Medicaid: A Primer
Elicia J. Herz
Specialist in Health Care Financing
April 4, 2013
Congressional Research Service
7-5700
www.crs.gov
RL33202
CRS Report for Congress
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Medicaid: A Primer

Summary
In existence for 48 years, Medicaid is a means-tested entitlement program that financed the
delivery of primary and acute medical services as well as long-term care to more than 71 million
people in FY2012. The estimated annual cost to the federal and state governments was roughly
$432 billion in FY2011. In comparison, the Medicare program provided health care benefits to
nearly 49 million seniors and certain persons with disabilities in CY2011, and cost roughly $560
billion in FY2011. Because Medicaid represents a large component of federal mandatory
spending, Congress is likely to continue its oversight of Medicaid’s eligibility, benefits, and costs.
Understanding the complex statutory and regulatory rules that govern Medicaid is further
complicated by the fact that each state designs and administers its own version of the program
under broad federal rules. State variability is the rule rather than the exception in terms of
eligibility levels, covered services, and how those services are reimbursed and delivered. The
Patient Protection and Affordable Care Act (ACA; P.L. 111-148, as amended) makes both
mandatory and optional changes to Medicaid along some of these dimensions.
This report describes the basic elements of Medicaid, focusing on the federal rules governing who
is eligible, what services are covered, how the program is financed, how beneficiaries share in the
cost of care, how providers are paid, and the role of special waivers in expanding eligibility and
modifying benefits. Examples of both mandatory and optional eligibility groups and benefits as
defined in the federal statute are described. Basic program statistics are also provided. Finally,
selected legislative changes at the federal level via the ACA, and the Supreme Court decision in
National Federation of Independent Business v. Sebelius announced on June 28, 2012, that affect
Medicaid in significant ways are also described.

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Medicaid: A Primer

Contents
Who Is Eligible for Medicaid? ......................................................................................................... 1
What Benefits Does Medicaid Cover? ............................................................................................. 5
Traditional Medicaid Benefits ................................................................................................... 5
Benchmark Benefit Packages .................................................................................................... 8
How Is Medicaid Financed? ............................................................................................................ 9
Do Beneficiaries Pay for Medicaid Services? ............................................................................... 11
Service-Based Cost Sharing Under Traditional Medicaid ....................................................... 11
Participation-Related Cost Sharing Under Traditional Medicaid ............................................ 12
Beneficiary Cost Sharing Under DRA .................................................................................... 12
How Are Providers Paid Under Medicaid? .................................................................................... 13
How Do Medicaid Research and Demonstration Waivers Work? ................................................. 14
Some Medicaid Statistics ............................................................................................................... 15
Medicaid Resources ....................................................................................................................... 16

Tables
Table 1. Coverage of the New Medicaid Group for Non-Elderly, Non-Pregnant
Individuals with Income Up to 133% FPL ................................................................................... 4

Contacts
Author Contact Information........................................................................................................... 16
Key Policy Staff ............................................................................................................................. 16

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Medicaid: A Primer

edicaid was enacted in 1965 in the same legislation that created the Medicare program
(i.e., the Social Security Amendments of 1965; P.L. 89-97). Medicaid grew out of and
Mreplaced two earlier programs of federal grants to states that provided medical care to
welfare recipients and the elderly. It has expanded in additional directions since that time, most
recently with the enactment of the Patient Protection and Affordable Care Act (ACA; P.L. 111-
148, as amended).1
In the federal budget, Medicaid is an entitlement program that constitutes a large share of
mandatory spending. Two other federally supported health programs—Medicare and the State
Children’s Health Insurance Program (CHIP)—are also entitlements,2 and are also components of
mandatory spending in the federal budget. All three programs finance the delivery of certain
health care services to specific populations. While Medicare is financed by the federal
government and premiums paid by beneficiaries, both Medicaid and CHIP are jointly financed by
the federal and state governments. Federal Medicaid spending is open-ended, with total outlays
dependent on the generosity of state Medicaid programs. In contrast, CHIP is a capped federal
grant to states.
Even though Medicaid is an entitlement program in federal budget terms, states choose whether
to participate, and all 50 states do so. If they choose to participate, states must follow federal rules
in order to receive federal reimbursement that offsets at least half of their Medicaid costs.
Although this report describes federal Medicaid requirements, a number of these requirements
can be waived, with approval from the Secretary of Health and Human Services (HHS), as
discussed in the subsection on research and demonstration waivers.
Who Is Eligible for Medicaid?
The federal Medicaid statute (Title XIX of the Social Security Act) defines more than 50 distinct
population groups as being potentially eligible. Historically, Medicaid eligibility was subject to
categorical restrictions that generally limited coverage to the elderly, persons with disabilities (as
generally defined under the federal Supplemental Security Income Program, or SSI),3 members of
families with dependent children, certain other pregnant women and children, certain women with
breast or cervical cancer, and uninsured individuals with tuberculosis. Recent changes in law
(described below) provide eligibility for nonelderly, childless adults who do not fit into these
traditional categories.
In addition, to qualify for Medicaid coverage, applicants’ income (e.g., wages, Social Security
benefits) and sometimes their resources, or assets (e.g., value of a car, savings accounts), must

1 For more information on the Medicaid changes under ACA, see CRS Report R41210, Medicaid and the State
Children’s Health Insurance Program (CHIP) Provisions in ACA: Summary and Timeline.
2 The term “entitlement” has two meanings in this context. To receive federal matching funds, states must meet federal
minimum requirements with respect to beneficiary eligibility and benefits (among other requirements). Individuals who
meet state eligibility requirements are entitled to Medicaid. Similarly, individuals who meet federal eligibility
requirements are entitled to Medicare. In contrast, states that meet certain federal requirements are entitled, or have
access to, federal CHIP grants. All states have qualified for CHIP. There is no individual entitlement under CHIP.
3 SSI is a needs-based program that provides cash benefits to ensure a minimum income to aged, blind, or disabled
persons with limited income and assets. It is a means-tested program that does not have work or contribution
requirements, but restricts benefits to those who meet asset and resource limitations. For more information about SSI,
see CRS Report 94-486, Supplemental Security Income (SSI).
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Medicaid: A Primer

meet program financial requirements. Medicaid began with eligibility based on receipt of cash
assistance under other programs such as Aid to Families with Dependent Children (AFDC), or the
SSI program, as noted above. In recent years, Medicaid has shifted largely to eligibility based on
income, and most enrollees do not receive cash assistance. However, states are still required to
apply rules used by their former AFDC programs4 or the federal SSI program when determining
countable income for Medicaid. Generally, SSI rules are applicable to the elderly and those with
disabilities, while AFDC rules are applicable to other groups. These programs differ on what
counts as income and how much is disregarded (ignored) for determining financial eligibility for
Medicaid. States have the option to apply additional disregards in order to reduce countable
income.
Some eligibility groups are mandatory, meaning that all states with a Medicaid program must
cover them; others are optional. Examples of groups that states must provide Medicaid to include
• poor families that meet the financial requirements (based on family size) of the
former AFDC cash assistance program;5
• families losing Medicaid eligibility due to increased earnings from work who
receive up to 12 months of Medicaid coverage;6
• pregnant women and children through age 6 with family income at or below
133% of the federal poverty level (FPL);7
• children ages 6 through 18 with family income at or below 100% FPL, rising to
133% FPL beginning in 2014 (or sooner at state option);
• low-income individuals who are age 65 and older, or blind, or under age 65 and
disabled who qualify for cash assistance under the SSI program;8
• certain groups of legal permanent resident immigrants (e.g., refugees for the first
seven years after entry into the United States.; asylees for the first seven years
after asylum is granted; lawful permanent aliens with 40 quarters of creditable
coverage under Social Security; immigrants who are honorably discharged U.S.
military veterans) who meet all other financial and categorical Medicaid
eligibility requirements; and
• beginning in 2014, certain individuals who age out of foster care, up to age 26,
and do not qualify under one of the other mandatory groups noted above.
Additionally, the ACA expanded Medicaid to include a new mandatory eligibility group.
Beginning in 2014 (or sooner at state option) all non-elderly, non-pregnant adults with modified

4 Under the 1996 welfare reform law (The Personal Responsibility and Work Opportunity Reconciliation Act of 1996,
P.L. 104-193), AFDC was replaced with the Temporary Assistance for Needy Families (TANF) program.
5 AFDC income standards are well below the federal poverty level, but states can modify (liberalize or potentially
further restrict) these criteria. Although TANF recipients are not automatically eligible for Medicaid, some states have
aligned income rules for TANF and Medicaid, thus facilitating Medicaid coverage for some TANF recipients.
6 This provision has been extended by several federal laws over time. Most recently, the American Taxpayer Relief Act
of 2012 (P.L. 112-240) made this provision effective through December 31, 2013.
7 For example, in 2013, the FPL for a family of four is $23,550—133% of FPL for such a family would equal
$31,321.50. See http://www.gpo.gov/fdsys/pkg/FR-2013-01-24/pdf/2013-01422.pdf.
8 Some states use income, resource and disability standards that differ from current SSI standards.
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Medicaid: A Primer

adjusted gross income (MAGI)9 at or below 133% FPL who do not qualify under one of the other
mandatory groups noted above will be eligible for Medicaid.10 As shown in Table 1, some states
have elected to cover this group prior to 2014.
However, on June 28, 2012, the United States Supreme Court issued a decision in National
Federation of Independent Business v. Sebelius. The Court held that the federal government
cannot terminate current Medicaid federal matching funds if a state refuses to expand its
Medicaid program to include non-elderly, non-pregnant adults with income under 133% of the
federal poverty level. If a state accepts the new ACA Medicaid expansion funds, it must abide by
the new expansion coverage rules, but, based on the Court’s opinion, it appears that a state can
refuse to participate in the expansion without losing any of its current federal Medicaid matching
funds.11 The Congressional Budget Office (CBO) and the Joint Committee on Taxation (JCT)
estimated that coverage expansion provisions in the ACA would increase enrollment by about 7
million in FY2014, rising to 11 million by FY2022 in both the Medicaid and the State Children’s
Health Insurance Programs (Congressional Budget Office, Estimates for the Insurance Coverage
Provisions of the Affordable Care Act Updated for the Recent Supreme Court Decision, July
2012). Many of these new enrollees will get Medicaid benchmark benefits, described further
below.

9 MAGI is defined as the Internal Revenue Code’s Adjusted Gross Income (AGI, which reflects a number of
deductions, including trade and business deductions, losses from sale of property, and alimony payments) increased (if
applicable) by tax-exempt interest and income earned by U.S. citizens or residents living abroad. While the Internal
Revenue Service’s definition of MAGI excludes non-taxable social security benefits, P.L. 112-56, enacted on
November 21, 2011, changed the definition of income for Medicaid eligibility to include such non-taxable social
security benefits. For more information, see CRS Report R41997, Definition of Income for Certain Medicaid
Provisions and Premium Credits in ACA, coordinated by Janemarie Mulvey.
10 On March 29, 2013, the Centers for Medicare and Medicaid Services (CMS) issued a final rule implementing the
ACA’s increased federal matching rate applicable to this new ACA eligibility group, beginning on January 1, 2014. For
additional information, see http://www.cms.gov/apps/media/press/factsheet.asp?Counter=4567&intNumPerPage=10&
checkDate=&checkKey=&srchType=1&numDays=3500&srchOpt=0&srchData=&keywordType=All&
chkNewsType=6&intPage=&showAll=&pYear=&year=&desc=&cboOrder=date.
11 There are a number of additional questions associated with the Supreme Court decision. For a more detailed
discussion, see the CRS Congressional Distribution Memo, Selected Issues Related to the Effect of NFIB v. Sebelius on
the Medicaid Expansion Requirements in Section 2001 of the Affordable Care Act by Kathleen S. Swendiman and
Evelyne P. Baumrucker. Also, see http://www.crs.gov/analysis/legalsidebar/pages/details.aspx?ProdId=117, and
http://www.crs.gov/analysis/legalsidebar/pages/details.aspx?ProdId=121.
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Medicaid: A Primer

Table 1. Coverage of the New Medicaid Group for Non-Elderly, Non-Pregnant
Individuals with Income Up to 133% FPL
Upper Income Level
States
(% FPL)
Method of Adoptiona Effective
Month
California 200%
(varies
by
Section 1115 waiver
November 2010
county)
Colorado
10% (with limited
Section 1115 waiver
March 2012
enrol ment)
Connecticut
56%
State plan amendment
April 2010
District of Columbia



Action 1
133%
State plan amendment
May 2010
Action 2
133%-200%
Section 1115 waiver
November 2010
Illinois (Cook
133%
Section 1115 waiver
October 2012
County/Greater Chicago
Area)
Minnesota


Action 1
75%
State plan amendment
March 2011
Action 2
75%-250%
Section 1115 waiver
August 2011
New Jersey
24%
Section 1115 waiver
April 2011
Ohio (Cuyahoga
133%
Section 1115 waiver
February 2013
County/Greater Cleveland
Area)
Washington State
133%
Section 1115 waiver
January 2011
Source: Centers for Medicare & Medicaid Services, Office of Legislation, personal communication, February, 6
2013.
Notes: In addition to these states, Guam was approved to cover such individuals up to 100% FPL effective
January 2012, and Puerto Rico was approved to cover such individuals with income up to 43% FPL effective July
2011. There may be additional states not represented in this table that extended Medicaid eligibility to low-
income childless adults via Section 1115 waiver authority prior to enactment of the ACA. FPL = federal poverty
level.
a. Section 1115 of the Social Security Act provides authority for research and demonstration waivers. Under
such authority, the Secretary can waive certain elements of a Medicaid state plan.
Examples of groups that states may choose to cover under Medicaid include
• parents with income above AFDC financial levels;
• pregnant women and infants with family income exceeding 133% FPL up to and
including 185% FPL;
• individuals who are ages 65 and over, or blind, or under age 65 and disabled
whose income exceeds the SSI level (about 75% FPL nationwide) up to and
including 100% FPL;
• certain children with disabilities who live at home but need the level of care
provided in an institution; in these cases, children whose income meets the SSI
level may qualify for Medicaid, and parental income and assets are ignored for
the purposes of determining eligibility;
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Medicaid: A Primer

• individuals who are living in institutions (e.g., nursing facilities or other medical
institutions) with income up to and including 300% of the maximum SSI benefit
(about 220% FPL);
• the “medically needy” who are individuals in categories selected by the state
(e.g., age 65 and above, the disabled, families with dependent children) whose
income is too high to qualify as categorically needy. For states that elect the
medically needy option, coverage must be provided to certain pregnant women
and children under age 18. Medically needy coverage is particularly important
for the elderly and persons with disabilities, since this pathway allows deductions
for medical expenses that lower the amount of income counted in the
determination of financial eligibility for Medicaid.12
• legal immigrants after their first five years (or earlier for children and pregnant
women) in this country; and
• beginning in 2014, all non-elderly, non-pregnant individuals with MAGI above
133% FPL.13
As of January 1, 2014, modified adjusted gross income (MAGI) rules14 will apply to most
Medicaid enrollees (beyond the expansion group that was a focus of the Supreme Court decision).
Also, no asset test will apply. In addition, for certain eligibility groups, states must disregard
dollar amounts equal to 5% FPL, and states are prohibited from applying additional income
disregards. MAGI will not apply for specific exempted populations (e.g., those eligible for
Medicaid based on their eligibility through another federal or state program such as SSI or foster
care, the elderly, certain disabled individuals, and medically needy populations). For such
exempted populations, AFDC and SSI income counting rules will continue to apply.
What Benefits Does Medicaid Cover?
Prior to 2006, in general, states provided mandatory and state-selected optional benefits to their
Medicaid beneficiaries. In this report, these are referred to as “traditional” benefits. Beginning in
2006, as an alterative to traditional benefits, states were given the option to provide what are
called “benchmark” benefit packages to certain Medicaid subpopulations. These plans can also be
limited to substate areas. When certain conditions are met, states can also offer premium
assistance for health insurance offered through employer-based plans for Medicaid children and
their parents.
Traditional Medicaid Benefits
Like eligibility, federal rules require states with Medicaid programs to cover certain benefits
under the traditional Medicaid program. Certain other services may also be offered at state option.
States define the specific features of each covered benefit within four broad federal guidelines:

12 For additional information about medically needy coverage, see http://www.medicaid.gov/Medicaid-CHIP-Program-
Information/By-Population/Adults/Non-Disabled-Adults.html.
13 It is unclear how many states will elect this option given that, beginning in 2014, these individuals will be eligible for
coverage through state-based exchanges.
14 The recent Supreme Court decision on the ACA did not affect the new MAGI rules.
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Medicaid: A Primer

• Each service must be sufficient in “amount, duration, and scope” to reasonably
achieve its purpose. States may place appropriate limits on a service based on
such criteria as medical necessity.
• Within a state, services available to the various categorically needy groups15 must
be equal in amount, duration, and scope. These requirements are called the
“comparability” rule.
• With certain exceptions, the amount, duration, and scope of benefits must be the
same statewide, referred to as the “statewideness” rule.
• With certain exceptions, beneficiaries must have “freedom of choice” among
health care providers or managed care entities participating in Medicaid.
Standard benefits identified in the federal statute and regulations include a wide range of medical
care and services. Some benefits are specific items, such as eyeglasses and prosthetic devices.
Other benefits are defined in terms of specific types of providers (e.g., physicians, hospitals)
whose array of services are designated as coverable under Medicaid. Still other benefits define
specific types of service (e.g., family planning services and supplies, pregnancy-related services)
that may be delivered by any qualified medical provider that participates in Medicaid.
Examples of benefits that are mandatory for most Medicaid groups include
• inpatient hospital services (excluding services for mental disease);
• services provided by federally qualified health centers;
• services provided by free-standing birthing centers;
• laboratory and x-ray services;
• physician services;
• pregnancy-related services;
• smoking cessation services for pregnant women (i.e., counseling and
pharmacotherapy) with no beneficiary cost-sharing;
• nursing facility services for individuals age 21 and over; and
• home health care for those entitled to nursing home care.
Examples of optional benefits for most Medicaid groups include
• prescribed drugs (covered by all states);
• routine dental care;
• physician-directed clinic services;
• services of other licensed practitioners (e.g., optometrists, podiatrists,
psychologists);

15 Categorically needy groups include families with children, the elderly, persons with disabilities, and certain other
pregnant women and children who meet former AFDC- and SSI-related financial standards, or have income below
specified percentages of the FPL. Beginning in 2014, or earlier at state option, this group will also include non-elderly,
non-pregnant adults.
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Medicaid: A Primer

• beginning in 2013, certain preventive care services recommended by the U.S.
Preventive Services Task Force and adult immunizations recommended by the
Advisory Committee on Immunization Practices;
• inpatient psychiatric care for the elderly and for individuals under age 21;16
• nursing facility services for individuals under age 21;
• consumer-directed personal care attendant services for persons with income up to
150% FPL, or higher when certain conditions are met;
• physical therapy; and
• prosthetic devices.
The optional traditional benefits offered vary across states. In addition, the breadth of coverage
for a given benefit can and does vary from state to state, even for mandatory services. For
example, states may place different limits on the amount of inpatient hospital services a
beneficiary can receive in a year (e.g., up to 15 inpatient days per year in one state versus
unlimited inpatient days in another state)—again, as long as applicable requirements are met
regarding comparability, statewideness and sufficiency of amount, duration and scope within the
state. Exceptions to stated limits may be permitted under circumstances defined by the state.
The federal Medicaid statute also specifies special benefits or special rules regarding certain
benefits for targeted populations. For example:
• Most Medicaid children under age 21 are entitled to Early and Periodic
Screening, Diagnostic and Treatment (EPSDT) services. Under EPSDT, children
receive well-child visits, immunizations, laboratory tests, and other screening
services at regular intervals. In addition, medical care that is necessary to correct
or ameliorate identified defects, physical and mental illness, and other conditions
must be provided, including optional services that states do not otherwise cover
in their Medicaid programs.
• Unauthorized aliens (i.e., illegal aliens, foreign nationals who are not lawfully
present in the United States) are ineligible for Medicaid. Such individuals who
meet the eligibility requirements for Medicaid, but are ineligible due to
immigration status, may receive Medicaid coverage for emergency conditions
(i.e., emergency Medicaid) only, which includes costs associated with emergency
labor and delivery for pregnant women and excludes costs for organ transplants.
• Special benefit rules apply to optional medically needy populations. States may
offer a more restrictive benefit package than is provided to categorically needy
populations, but at a minimum, must offer (1) prenatal, delivery, and postpartum
services for pregnant women; (2) ambulatory services as defined in the state
Medicaid plan for individuals under 18 and those entitled to institutional

16 The ACA established a three-year, $75 million Medicaid emergency psychiatric demonstration project. Eligible
states will reimburse certain private institutions for mental disease (IMDs) for services rendered to adults (ages 21 to
64) to stabilize a psychiatric emergency medical condition. For more information about this demonstration, see CRS
Report R41210, Medicaid and the State Children’s Health Insurance Program (CHIP) Provisions in ACA: Summary
and Timeline, and the following link to the CMS website at http://innovations.cms.gov/initiatives/medicaid-emergency-
psychiatric-demo/index.html.
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GOVERNMENT SERIES
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A Description of the Federal and
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Medicaid: A Primer

services; and (3) home health services for individuals entitled to nursing facility
care.17
• State Medicaid programs must pay Medicare cost-sharing expenses (e.g.,
Medicare premiums and, in some cases, deductibles and co-insurance) for certain
low-income individuals eligible for both programs, often called “dual eligibles.”
• Under Section 1915(c) of Medicaid law, the Secretary may waive certain
statutory requirements to allow states to offer comprehensive long-term services
and supports (LTSS) to people living in home and community-based (HCB)
settings who would otherwise require an institutional level of care. Medicaid law
also gives states the authority, under Section 1915(i), to offer LTC services to
persons residing in HCB settings with a lower level-of-care need. Further, a
variety of other state plan benefit options are available to states to cover personal
care attendant services (e.g., §1915(j) and 1915(k)). Such benefits are designed to
help maximize independence, avoid unnecessary hospitalizations, and delay or
even prevent the need for institutional care.
Benchmark Benefit Packages
As an alternative to providing all of the mandatory and selected optional benefits under traditional
Medicaid, the Deficit Reduction Act of 2005 (DRA; P.L. 109-171) gave states the option to enroll
state-specified groups in new benchmark and benchmark-equivalent benefit packages. The new
eligibility group for non-elderly, non-pregnant adults with income up to and including 133% FPL
will be enrolled in these plans instead of traditional Medicaid, but certain subpopulations will be
exempt from mandatory enrollment in benchmark plans (e.g., those with special health care
needs).
In general, benchmark benefit packages may cover fewer benefits than traditional Medicaid, but
there are some requirements, such as coverage of EPSDT services and both emergency and non-
emergency transportation to and from medical providers (as per a 2010 regulation),18 that might
make them more generous than private insurance. The benchmark options include
• the standard Blue Cross/Blue Shield preferred provider plan under the Federal
Employees Health Benefits Program (FEHBP),
• a plan offered to state employees,
• the largest commercial HMO in the state, and
• other Secretary-approved coverage appropriate for the targeted population.
Benchmark-equivalent coverage must have at least the same actuarial value as one of the
benchmark plans identified above. Such coverage must include (1) inpatient and outpatient
hospital services; (2) physician services; (3) lab and x-ray services; (4) emergency care; (5) well-
child care, including immunizations; (6) prescribed drugs; (7) mental health services; and (8)
other appropriate preventive care (designated by the Secretary). Such coverage must also include

17 Broader requirements apply if a state has chosen to provide coverage for medically needy persons in institutions for
mental disease and intermediate care facilities for the mentally retarded.
18 Department of Health and Human Services, Centers for Medicare & Medicaid Services, Medicaid Program: States
Flexibility for Medicaid Benefit Packages, Final Rule, 75 Federal Register 23068 (April 30, 2010).
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Medicaid: A Primer

at least 75% of the actuarial value of coverage under the benchmark plan for vision care and
hearing services (if any).
For any child under age 21 in one of the major mandatory and optional Medicaid eligibility
groups, benchmark and benchmark-equivalent coverage must include EPSDT. Also, Medicaid
beneficiaries enrolled in such coverage must have access to services provided by rural health
clinics and federally qualified health centers.
As of July 2012, 12 states (and one territory, Guam) had approved benchmark plans. Most of
these plans were classified as Secretary-approved, which generally means the benefit package
was tailored to the target population(s) to be enrolled.19
Starting in 2014, both benchmark and benchmark-equivalent packages must cover at least
essential health benefits that will also apply to plans in the private individual and small group
markets. There are 10 such essential health benefits: (1) ambulatory patient services, (2)
emergency services, (3) hospitalization, (4) maternity and newborn care, (5) mental health and
substance use disorder services including behavioral health treatment, (6) prescription drugs, (7)
rehabilitative and habilitative services and devices, (8) laboratory services, (9) preventive and
wellness services and chronic disease management, and (10) pediatric services, including oral and
vision care.20 Many of these essential health benefits are already coverable under benchmark
packages. All benchmark packages must also cover family planning services.
Mental health parity, as defined in the Public Health Service Act, generally means that, under a
given insurance plan, coverage of mental health services (if offered) should be on par with
coverage of medical and surgical services in terms of the treatment limitations (e.g., amount,
duration and scope of benefits), financial requirements (e.g., beneficiary co-payments), in- and
out-of-network covered benefits, and annual and lifetime dollar limits. Managed care plans21
under both traditional Medicaid and benchmark packages must comply with all federal mental
health parity requirements. Benchmark packages that are not managed care plans are only
required to comply with federal requirements for parity in treatment limitations and financial
requirements. However, these plans are deemed to comply with federal mental health parity
requirements if they offer EPSDT, which they are statutorily required to cover.22
How Is Medicaid Financed?
The federal and state governments share the cost of Medicaid. States are reimbursed by the
federal government for a portion (the “federal share”) of a state’s Medicaid program costs.

19 For more information about both traditional and benchmark benefits, see CRS Report R42478, Traditional Versus
Benchmark Benefits Under Medicaid, by Elicia J. Herz.
20 Department of Health and Human Services, “Patient Protection and Affordable Care Act; Standards Related to
Essential Health Benefits, Actuarial Value, and Accredition,” Final Rule, February 25, 2013, at http://www.gpo.gov/
fdsys/pkg/FR-2013-02-25/pdf/2013-04084.pdf. For additional guidance specific to Medicaid, see the State Medicaid
Directors Letter #12-003 at http://www.medicaid.gov/Federal-Policy-Guidance/downloads/SMD-12-003.pdf.
21 Under managed care delivery systems, payments to managed care plans are typically made on a predetermined, per-
person-per-month basis. In contrast, under the traditional fee-for-service delivery system, health care providers are paid
for each unit of service delivered.
22 For more detailed information on mental health parity under Medicaid, see CRS Report R41249, Mental Health
Parity and the Patient Protection and Affordable Care Act of 2010, by Amanda K. Sarata.
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Medicaid: A Primer

Because Medicaid is an open-ended entitlement, there is no upper limit or cap on the amount of
federal funds a state may receive. Medicaid costs in a given state and year are primarily
determined by the expansiveness of eligibility rules and beneficiary participation, the breadth of
benefits offered, the generosity of provider reimbursement rates, and other supplemental
payments.
The state-specific federal share for benefit costs is determined by a formula set in law that
establishes higher federal shares for states with per capita personal income levels lower than the
national average (and vice versa for states with per capita personal income levels that are higher
than the national average). The federal share, called the federal medical assistance percentage
(FMAP), is at least 50% and can be as high as 83% (statutory maximum). 23 For FY2012, the
federal share for benefit costs ranges from 50% (in 14 states) up to 74.18% (in one state,
Mississippi).24 In addition, the FMAP is 55% for each of five territories (American Samoa, Guam,
Northern Mariana Islands, Puerto Rico, and the Virgin Islands).25
The federal match for administrative expenditures does not vary by state and is generally 50%,
but certain administrative functions have a higher federal matching rate. Functions with a 75%
federal match include, for example, survey and certification of nursing facilities, operation of a
state Medicaid fraud control unit (MFCU), and operation of an approved Medicaid management
information system (MMIS) for claims and information processing. Overall, administrative costs
represent about 5% of total Medicaid spending in a given year.
The ACA included provisions that changed certain payments to states under Medicaid. One such
provision affects disproportionate share hospital (DSH) payments. States make DSH payments to
hospitals that treat large numbers of low-income and Medicaid patients. The main purpose of
these payments is to compensate hospitals for otherwise low Medicaid payments and
uncompensated care. For FY2009 forward, state DSH allotments equal the prior year amount
increased by the change in the consumer price index for all urban consumers. For FY2012,
preliminary allotments were estimated to total about $11 billion.26 That overall amount will
increase over time under the current formula until FY2014, when there should be fewer uninsured
individuals as a result of a number of changes in insurance coverage via ACA. Thus, there may be
less need for Medicaid DSH payments going forward. Under the ACA, there will be specific

23 There are a number of exceptions to the FMAP. For example, for family planning services and supplies, the federal
share is 90% for all states. In addition, the federal share is 100% for Medicaid services provided by an Indian Health
Service or IHS facility (whether operated by the IHS or certain Indian tribes or tribal organizations) to Medicaid
beneficiaries. For additional information on FMAP, see CRS Report RL32950, Medicaid’s Federal Medical Assistance
Percentage (FMAP), FY2013.
24 Department of Health and Human Services, Federal Financial Participation in State Assistance Expenditures; Federal
Matching Shares for Medicaid, the Children’s Health Insurance Program, and Aid to Needy Aged, Blind, or Disabled
Persons for October 1, 2012 through September 30, 2013, Federal Register, Vol. 76, No. 230, pp. 74061-74063,
November 30, 2011.
25 The Medicaid programs in the territories are subject to annual federal spending caps. In the past, all five territories
typically exhausted these federal funds prior to the end of the fiscal year. Once the cap is reached, the territories assume
the full cost of Medicaid services, or in some instances, may suspend services or cease payments to providers until the
next fiscal year. The ACA provided the territories with $6.3 billion in additional federal Medicaid payments for the
period between July 1, 2011, and September 30, 2019, more funding than they have received in the past. These funds
are to be distributed among the territories in an amount that is proportional to the capped amounts that were previously
available to them.
26 Department of Health and Human Services, “Medicaid Program: Disproportionate Share Hospital Allotments and
Institutions for Mental Diseases Disproportionate Share Hospital Limits for FYs 2010, 2011, and Preliminary FY2012
Disproportionate Share Hospital Allotments and Limits,” 77 Federal Register 43301, July 24, 2012.
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Medicaid: A Primer

reductions in overall DSH allotments by fiscal year that must be implemented by the Secretary.
These reductions will be $500 million in FY2014, $600 million for each of FY2015 and FY2016,
$1.8 billion for FY2017, $5.0 billion for FY2018, $5.6 billion for FY2019, and $4.0 billion for
FY2020.27
The ACA did not specify a formula for achieving these overall reductions in federal DSH
allotments to states. Instead, the Secretary must use certain general parameters to develop a
methodology to achieve these dollar reductions.28
Do Beneficiaries Pay for Medicaid Services?
Under traditional Medicaid, states are allowed to require certain beneficiaries to share in the cost
of Medicaid services, although there are limits on (1) the amounts that states can impose, (2) the
beneficiary groups that can be required to pay, and (3) the services for which cost-sharing can be
charged. The rules for service-based cost-sharing (e.g., copayments paid to a provider at the time
of service delivery) are different from those for participation-related cost-sharing (e.g., premiums
paid by beneficiaries typically on a monthly basis independent of any services rendered).
Service-Based Cost Sharing Under Traditional Medicaid
For some groups of beneficiaries, all service-related cost sharing is prohibited unless the
prohibitions are lifted under a special waiver (see the subsection on waivers below). All service-
related cost sharing is prohibited for children under 18 years of age. Service-related cost sharing
is prohibited for pregnant women for any services that relate to the pregnancy or to any other
medical condition that may complicate pregnancy, and for counseling and pharmacotherapy for
cessation of tobacco use. Other examples of prohibitions on cost-sharing include
• services furnished to individuals who are inpatients in a hospital, or are residing
in a long term care facility or in another medical institution if the individual is
required to spend most of their income for medical care;
• services provided to Indians by an Indian health care provider or through referral
under contract health services;
• emergency services; and
• family planning services and supplies.
For most other beneficiaries and services, Medicaid programs are allowed to establish “nominal”
service-related cost sharing requirements. For example, for FY2009, the maximum permissible
nominal amounts defined in regulations for copayments ranged from $0.60 to $3.40,29 depending

27 The Middle Class Tax Relief and Job Creation Act of 2012 (P.L. 112-96) and the American Taxpayer Relief Act of
2012 (P.L. 112-240) extended the DSH reductions to FY2021 and FY2022.
28 These parameters are described in more detail in CRS Report R42865, Medicaid Disproportionate Share Hospital
Payments, by Alison Mitchell.
29 The effective date of the 2008 final rule for the DRA premium and cost-sharing provisions (73 Federal Register
71828; described in the next subsection) is July 1, 2010. This rule includes a medical inflation adjustment for nominal
service-related cost-sharing maximums. These copayment amounts may be updated each October 1, by the percentage
change in the medical care component of the CPI-U for the period September to September ending in the preceding
(continued...)
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Medicaid: A Primer

on the cost of the service provided. For working individuals with disabilities who qualify for
Medicaid under eligibility pathways established by the Balanced Budget Act of 1997 (BBA97)
and the Ticket to Work and Work Incentives Improvement Act of 1999 (TWWIIA), service-
related cost sharing charges may be required that exceed nominal amounts as long as they are set
on a sliding scale based on income.
Under traditional Medicaid, providers cannot deny care or services based on an individual’s
ability to pay Medicaid cost-sharing amounts. In the past, some states allowed providers to refuse
to provide services to Medicaid beneficiaries who failed to make copayments, but most states did
not have specific policies on this issue.30
Participation-Related Cost Sharing Under Traditional Medicaid
Premiums and enrollment fees are generally prohibited under traditional Medicaid. Examples of
permitted exceptions include the following:
• For certain families losing eligibility due to increased earnings from work, states
may charge premiums but only for the final six months of transitional Medicaid
coverage.
• For pregnant women and infants with family income that exceeds 150% FPL,
states are allowed to implement nominal premiums or enrollment fees between
$1 and $19 per month, depending on family income.
• For individuals who qualify for Medicaid through the medically needy pathway,
states may implement a monthly fee as an alternative to meeting the financial
eligibility thresholds by deducting medical expenses from income (i.e., the
“spend down” method).
• For individuals who qualify under pathways for working individuals with
disabilities, states may charge premiums or enrollment fees. Fees for individuals
with a disability who qualify under the provisions of BBA97 and whose family
income does not exceed 250% FPL are charged on a sliding scale based on
income (determined by the state). Premiums charged to those who qualify under
TWWIIA, whose income is between 250% and 450% FPL, cannot exceed 7.5%
of income. (When a state covers both groups, the same cost-sharing rules must
apply.)
Beneficiary Cost Sharing Under DRA
DRA (as modified by the Tax Relief and Health Care Act of 2006, P.L. 109-432) provided states
with an alternative for Medicaid premiums and service-related cost sharing. Under this option,
states may impose premiums and cost sharing through Medicaid state plan amendments rather
than through waiver authority, subject to specific restrictions.

(...continued)
calendar year and then rounded to the next higher 5-cent increment.
30 U.S. Department of Health and Human Services, Office of Inspector General, Medicaid Cost Sharing, OEI-03-91-
01800 (July 1993), available at http://oig.hhs.gov/oei/reports/oei-03-91-01800.pdf.
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In general, for individuals with income under 100% FPL:
• no premiums may be imposed,
• service-related cost sharing cannot exceed nominal amounts, and
• the total aggregate amount of all cost sharing cannot exceed 5% of monthly or
quarterly family income.
For individuals in families with income between 100% and 150% FPL:
• no premiums may be imposed,
• service-related cost sharing cannot exceed 10% of the cost of the item or service
rendered, and
• the total aggregate amount of all cost-sharing cannot exceed 5% of monthly or
quarterly family income.
For individuals in families with income above 150% FPL:
• service-related cost sharing cannot exceed 20% of the cost of the item or service
rendered, and
• the total aggregate amount of all cost-sharing (including any applicable
premiums) cannot exceed 5% of monthly or quarterly family income.
There are exemptions to DRA cost sharing for certain subgroups and services, which generally
mirror those applicable under traditional Medicaid. For example, certain groups (e.g., some
children, pregnant women, certain individuals with special needs) are exempt from paying
premiums regardless of their income. Also, certain groups and services (e.g., preventive care for
children, emergency care, family planning services) are exempt from the service-related cost
sharing.
Under the DRA option, special rules apply to cost sharing for non-preferred prescription drugs
and for emergency room copayments for non-emergency care, and as with traditional Medicaid,
such cost sharing will also be adjusted for medical inflation over time. DRA also allowed states to
condition continuing Medicaid eligibility on the payment of premiums. Providers may also deny
care for failure to pay service-related cost sharing.
How Are Providers Paid Under Medicaid?
For the most part, states establish their own payment rates for Medicaid providers. Federal statute
requires that these rates be sufficient to enlist enough providers so that covered benefits will be
available to Medicaid beneficiaries at least to the same extent they are available to the general
population in the same geographic area. For CY2013 and CY2014 only, the ACA requires that
Medicaid payment rates for certain primary care services be raised to what Medicare pays for
these services. Also, for those two years only, the federal government will pick up the entire cost
of that increase in payments (i.e., the difference between Medicare payment rates and the existing
Medicaid payment rates as of July 1, 2009).
Medicaid regulations place restrictions on how Medicaid cost-sharing may be used in determining
provider reimbursement. States are prohibited from increasing the payments they make to
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Medicaid: A Primer

providers to offset uncollected amounts for deductibles, co-insurance, co-payments, or similar
charges that the provider has waived or that are uncollectable (with the exception of providers
reimbursed by the state under Medicare reasonable cost reimbursement principles).31 In addition,
if a state contracts with certain managed care organizations that do not impose the state’s
Medicaid cost-sharing requirements on their Medicaid members, the state must calculate
payments to such organizations as if those cost-sharing amounts were collected.32
How Do Medicaid Research and Demonstration
Waivers Work?
Section 1115 of the Social Security Act provides the Secretary of HHS with broad authority to
conduct research and demonstration projects that further the goals of the Medicaid program (as
well as other programs, such as CHIP). Some policymakers at both the federal and state level
view Section 1115 authority as a means to restructure Medicaid coverage, control costs, and
increase state flexibility in a variety of ways. To obtain such a waiver, a state must submit
proposals outlining the terms and conditions of its waiver for approval by the federal agency that
oversees and administers the Medicaid program, the Centers for Medicare & Medicaid Services
(CMS).
Under this authority, the Secretary may waive any Medicaid requirements contained in Section
1902 of the federal Medicaid statute, including but not limited to, freedom of choice of provider,
and comparability and statewideness of benefits (as described above in the benefits section). For
example, states may obtain waivers that allow them to provide services to individuals who would
not otherwise meet Medicaid eligibility rules, cover non-Medicaid services, limit benefit
packages for certain groups, adapt programs to the special needs of particular geographic areas or
groups of recipients, or accomplish a policy goal such as to temporarily extend Medicaid in the
aftermath of a disaster (as was done in New York City after the September 11 terrorist attacks and
in Gulf Coast states after Hurricane Katrina).
Approved waivers are deemed to be part of a state’s Medicaid plan, and thus, the federal share of
the costs for such waivers is determined by the FMAP formula (described earlier). Unlike
traditional Medicaid, waiver guidance33 specifies that the costs of 1115 waivers must be budget
neutral over the life of the program. To meet this requirement, estimated spending under the
waiver cannot exceed the estimated cost of the state’s existing Medicaid program under current
law requirements (either on a per capita or aggregate basis). For example, states may move
certain existing Medicaid populations into managed care arrangements and use the savings
accrued from that action to finance coverage of otherwise ineligible individuals under an
approved waiver.
There are specific limits and restrictions on how a state may operate a waiver program. For
example, such waivers must not limit mandatory services for the mandatory pregnant women and

31 For providers reimbursed under such principles, the state may increase its payment to offset uncollected Medicaid
cost-sharing amounts that are bad debts for such providers. See 42 CFR 447.57.
32 For more information, see 42 CFR 447.58.
33 Medicaid Program; Demonstration Proposals Pursuant to Section 1115(a) of the Social Security Act; Policies and
Procedures, 59 Federal Register 49249 (September 27, 1994).
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Medicaid: A Primer

children eligibility groups. Another provision specifies restrictions on cost-sharing that may be
imposed under waivers. The ACA included transparency requirements to facilitate public notice
and input for such waivers.
Some Medicaid Statistics
In FY2012, a total of 70.7 million people were estimated to be enrolled in Medicaid at some time
during the year (excluding the territories). One-half of these beneficiaries (35.0 million) were
children, and 18.9 million were adults in families with dependent children. There were also 10.9
million individuals with disabilities and 5.9 million people over the age of 65 enrolled in
Medicaid that year.34 Total Medicaid spending, including the costs of benefits and program
administration for the federal and state governments combined, was $432.2 billion for FY2011.35
Across the nation, traditional Medicaid covers a very diverse population and, compared to both
Medicare and employer-sponsored health care plans, offers the broadest array of medical care and
related services available in the United States today. Different groups under Medicaid have very
different service utilization patterns. These patterns result in large differences in the proportion of
total benefit expenditures by group.36 For example, for FY2010:
• While the majority of enrollees were children without disabilities (roughly half),
such children accounted for only about 19% of Medicaid’s total expenditures on
benefits. Most of the expenditures for such children are typically for primary and
acute care in the fee-for-service setting, as well as for managed care premiums.
• The next-largest beneficiary group—adults in families with dependent children—
accounted for about 26% of all enrollees, but only about 13% of benefit
expenditures. Like children, primary and acute fee-for-service care and managed
care premiums account for the majority of these costs.
• In contrast, individuals with disabilities represented about 15% of Medicaid
enrollees, but this group accounted for the largest share of Medicaid expenditures
for benefits (about 42%) of all groups. Most of the costs for persons with
disabilities are typically for institutional and non-institutional long-term care
services and supports, primary and acute fee-for-service care, and outpatient
prescription drugs.
• Finally, the elderly represented about 8% of Medicaid enrollees, but about 19%
of all expenditures for benefits. For the aged, the majority of costs are usually for
long-term care and outpatient prescription drugs.37

34 Beneficiary statistics for FY2012 were taken from Table 1.16, 2012 CMS Statistics, U.S. Department of Health and
Human Services.
35 Total Medicaid spending for FY2011 was taken from Table III.2, 2012 CMS Statistics, U.S. Department of Health
and Human Services.
36 Medicaid payments by eligibility group for FY2010 were taken from Table III.10, 2012 CMS Statistics, U.S.
Department of Health and Human Services.
37 Since 2006, Medicaid beneficiaries who are also eligible for Medicare (i.e., the elderly and certain individuals with
disabilities) receive their outpatient prescription drugs through the Medicare prescription drug benefit (known as
Medicare Part D) instead of through Medicaid. As a result, Medicaid’s drug costs for these populations have been
considerably reduced.
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Medicaid: A Primer

While these statistics vary somewhat from year to year and state to state, the patterns described
above generally hold true.
Medicaid Resources
For more information on Medicaid, below is a selection of CRS reports that may be of interest.
CRS Report R41210, Medicaid and the State Children’s Health Insurance Program (CHIP)
Provisions in ACA: Summary and Timeline
CRS Report R42640, Medicaid Financing and Expenditures
CRS Report R42478, Traditional Versus Benchmark Benefits Under Medicaid
CRS Report R42893, Proposals to Reduce Federal Medicaid Expenditures
CRS Report R42978, Comparing Medicaid and Exchanges: Benefits and Costs for Individuals
and Families
CRS Report RS22843, Medicaid Provider Taxes

Author Contact Information

Elicia J. Herz

Specialist in Health Care Financing
eherz@crs.loc.gov, 7-1377

Key Policy Staff
Area of Expertise
Name
Phone
E-mail
Eligibility, waiver authorities,
Evelyne Baumrucker
7-8913
ebaumrucker@crs.loc.gov
interaction with state exchanges
Dual eligibles, prescription drugs,
Cliff Binder
7-7965
cbinder@crs.loc.gov
administration and program integrity
Long-term services and supports
Kirsten Colel o
7-7839
kcolello@crs.loc.gov
(LTSS) in general
Benefits and cost-sharing
Elicia Herz
7-1377
eherz@crs.loc.gov
Financing, FMAP and territories
Alison Mitchell
7-0152
amitchell@crs.loc.gov


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