What is the difference between Medicare and Medicaid?
Medicare and Medicaid are separate programs that differ by who they serve and how they are run, and many people qualify for both.
Covers: This page explains how Medicare and Medicaid differ in eligibility, funding, administration, and covered services, and who each program serves. It does not cover private insurance, Medicare Advantage plan comparisons, or state-by-state Medicaid enrollment steps.
Also answers: How is Medicare different from Medicaid? · Medicare and Medicaid difference · Medicare versus Medicaid explained
- One page for this question6 other ways of asking lead here
- 4 independent sourcesEvery claim links to what supports it
- 4 connected pages4 changed this week
- Clean discussionScreened before anything appears
Before you read, make a guess
Fill in the blank: ?% of everyone in Medicaid and/or Medicare who were dually eligible
Drag the slider to fill in the blank
The short answer
Evidence-backed AI-prepared starting mapMedicare and Medicaid are two separate U.S. public health insurance programs that differ mainly in who they serve and how they are run. Medicare is a federal program for people age 65 or older and for younger people with disabilities, including end stage renal disease and ALS; it began in 1965 and is now administered by the Centers for Medicare and Medicaid Services (CMS). It is divided into Parts A (hospital, skilled nursing, hospice), B (outpatient), C (private-plan alternative providing the same services as A and B, usually with extras), and D (self-administered prescription drugs). In 2022 Medicare covered 65.0 million people—more than 57 million aged 65 and older and about 8 million younger people—and covers roughly half of enrollees' healthcare expenses. Medicaid, by contrast, is the income-based program; many people qualify for both, and these "dually eligible" beneficiaries make up 8.7% of everyone enrolled in Medicaid and/or Medicare.12
- Evidence 19
- Interpretation 3
Did this answer your question?
Be the first to voteIn brief
Medicare has four parts—A (hospital, skilled nursing, hospice), B (outpatient), C (private-plan alternative), and D (prescription drugs)—and covered 65.0 million people in 2022.1
Evidence-backedMedicare pays for only about half of enrollees' healthcare expenses, leaving a gap that Medicaid fills for those who also qualify by income.1
Evidence-backedDual-eligible beneficiaries are 8.7% of everyone in the two programs and have the highest rates of behavioral health diagnoses and service use.2
Evidence-backedDual-eligible beneficiaries had about one fewer year of cardiovascular-disease-free survival than non-dual-eligible beneficiaries (4.89 vs. 5.95 years) and higher mortality, though these are associations, not proven effects of coverage.3
Evidence-backed
At a glance
The picture in numbers
Live · updated just now
65 million people
8.7%
9 in every 100
- Medicaid-only55.8%
- Medicare-only35.5%
- Dually eligible8.7%
- Dual eligible4.89 years
- Non-dual eligible5.95 years
The evidence behind it
4 sources- Other studies and data3
- Background1
Published in 2026
| Source | Kind | Year |
|---|---|---|
| Medicare (United States) (Wikipedia) | Background | Unknown |
| A comparison of behavioral health service use among dually eligible, Medicaid-only, and Medicare-only beneficiaries. | Other studies and data | 2026 |
| Cardiovascular Multimorbidity and Associated Mortality Among Medicare Beneficiaries Dually Eligible for Medicaid. | Other studies and data | 2026 |
| Enrollment in Integrated Special Needs Plans Among Dually Eligible Beneficiaries With Serious Mental Illness. | Other studies and data | 2026 |
The community around it
No one has added to this page yet. Firsthand experience, a newer study or a different reading of the numbers would show up here, credited to you.
What it means for you
Which fits you?
Pick the situation closest to yours. Each answer says what it rests on.
If you are approaching 65 or have a qualifying disability
Medicare is the program defined by your age or disability status, not your income, so eligibility does not depend on how much you earn.1
Evidence-backedIf your income is low and you are also eligible for Medicare
you may qualify for both programs at once; dual-eligible beneficiaries are 8.7% of everyone enrolled in Medicaid and/or Medicare.2
Evidence-backedIf you are budgeting for Medicare alone
plan for Medicare to cover roughly half of your healthcare expenses, based on Medicare Trustees reports and MedPAC research.1
Evidence-backedIf you want to know what Medicare's parts cover
Part A covers hospital, skilled nursing, and hospice; Part B covers outpatient care; Part C offers private plans providing the same services as A and B, usually with extras; Part D covers self-administered prescription drugs.1
Evidence-backedIf you are dually eligible and have a serious mental illness
integrated special needs plans are an increasingly used option—enrollment rose from 2.4% in 2019 to 17.2% in 2022—but more than half of states had no integrated D-SNP offerings, so availability depends on where you live.4
Evidence-backedIf you are dually eligible and weighing an integrated plan against standard Medicare Advantage
disenrollment by 2022 was lower from integrated plans (10.3% for HIDE-SNPs, 6.1% for FIDE-SNPs) than from standard Medicare Advantage (20.9%), which the study authors suggest may indicate enrollee satisfaction.4
Evidence-backedThe full story · 3 chapters
01
Who each program serves
AI summary:Medicare eligibility is based on age or disability, Medicaid on income, so many people qualify for both.
Evidence-backed: Medicare's eligibility is defined by age and disability status rather than income: it covers people 65 and older and younger people with disabilities, including those with end stage renal disease and ALS. In 2022 it insured 65.0 million people—more than 57 million aged 65 and older and about 8 million younger people.1
Evidence-backed: Medicaid's eligibility is tied to income and need rather than age, which is why the two programs overlap: among 147,426,385 people enrolled in Medicaid and/or Medicare, 8.7% were dually eligible for both, 55.8% were Medicaid-only, and 35.5% were Medicare-only. That means most enrollees in this population were in Medicaid alone, and a substantial minority in Medicare alone.2
Interpretation: The practical consequence of the split is that a person can qualify for Medicare by age or disability and separately qualify for Medicaid by income, ending up in both. The dual-eligible group is not a small edge case: it is roughly one in twelve of everyone in these two programs combined.2
02
How Medicare is structured and what it covers
AI summary:Medicare has four parts covering hospital, outpatient, private-plan, and prescription drug services, but pays only about half of enrollees' costs.
Evidence-backed: Medicare is divided into four parts. Part A covers hospital, skilled nursing, and hospice services. Part B covers outpatient services. Part C is an alternative that lets patients choose private plans with different benefit structures that provide the same services as Parts A and B, usually with additional benefits. Part D covers self-administered prescription drugs.1
Evidence-backed: Medicare is not full coverage of costs: according to annual Medicare Trustees reports and research by Congress' MedPAC group, it covers about half of healthcare expenses for those enrolled. The rest falls to supplemental coverage, Medicaid (for dual-eligible people), or out-of-pocket spending.1
03
What dual eligibility looks like in practice
AI summary:People in both programs have more diagnoses and higher service use than those in either program alone.
Evidence-backed: Dually eligible beneficiaries had the highest prevalence of behavioral health diagnoses and the highest rates of behavioral health service utilization among the three coverage groups. Medicare-only beneficiaries had the lowest utilization rates, and Medicaid-only beneficiaries showed intermediate levels of use. Within the dual-eligible group, adults 18–54, males (for substance use disorder), White beneficiaries, and urban residents had the highest utilization rates.2
Evidence-backed: In a study of 2,189,382 patients (12.9% dual eligible), non-dual-eligible beneficiaries had about one more year of survival free from cardiovascular disease than dual-eligible beneficiaries (4.89 versus 5.95 years) over a median five years of follow-up. Dual-eligible beneficiaries were more likely to develop cardiovascular disease and multimorbidity and had higher mortality rates, both before and after adjustment for demographics and medical comorbidity burden.3
Evidence-backed: Among dually eligible beneficiaries with serious mental illness, enrollment in integrated special needs plans (HIDE-SNPs or FIDE-SNPs) rose from 2.4% in 2019 to 17.2% in 2022, while traditional Medicare enrollment fell from 58.6% to 42.6%. Cardiovascular disease was prevalent in this group: 32.1% had three CVD risk factors. More than half of states had no integrated D-SNP offerings, including some states ranked highest for prevalence of comorbid CVD among these beneficiaries. Disenrollment by 2022 was 10.3% for HIDE-SNPs and 6.1% for FIDE-SNPs, versus 20.9% from standard Medicare Advantage.4
Interpretation: The consistent pattern across these studies is that people in both programs carry more diagnoses and use more services than people in either program alone. That is best read as a marker of greater need and of the two programs stacking rather than duplicating: Medicare supplies age- or disability-based coverage, and Medicaid adds income-based coverage on top.234
Your turn
Have your say
See where others stand. Join free to add your perspective. One answer per account.
How do you feel about this?
No votes yetQuick questions from connected pages
Before you go
What to remember
Try to recall each hidden figure before you reveal it. Remembering, not rereading, is what makes it stick.
Medicare has four parts—A (hospital, skilled nursing, hospice), B (outpatient), C (private-plan alternative), and D (prescription drugs)—and covered million people in 2022.
Dual-eligible beneficiaries are of everyone in the two programs and have the highest rates of behavioral health diagnoses and service use.
Medicare is age- and disability-based and federally run; Medicaid is income-based, which is why the two overlap for people who qualify for both.
Your reading
0 of 3 chaptersThis answer keeps changing
When new evidence or a better source comes in, this page is updated (it's on version 2, last changed 51 minutes ago). Follow it to be told when that happens.
Up nextWhat is the difference between weather and climate?Ask this Sylo
Still wondering about something?
Answers come only from this page's reviewed material, with citations, and say plainly when the page doesn't cover it yet.
Behind this page
Who's adding to it, where it comes from, how it changed and what would make it better. Always open to everyone.
Discussion
Sources
Numbers match the citations in the article. A working link isn't proof that a page supports a claim; check the quoted passage and date.
- 1Medicare (United States) (Wikipedia)WikipediaPublished Oct 10, 2026Checked Oct 11, 2026
“Medicare is a federal health insurance program in the United States for people age 65 or older and younger people with disabilities, including those with end stage renal disease and amyotrophic lateral sclerosis (ALS or Lou Gehrig's disease). It started in 1965 under the Social Security Administration and is now administered by the Centers for Medicare and Medicaid Services (CMS). Medicare is divided into four parts: A, B, C, and D. Part A covers hospital, skilled nursing, and hospice services. Part B covers outpatient services. Part C is an alternative that allows patients to choose private plans with different benefit structures that provide the same services as Parts A and B, usually with additional benefits. Part D is for self-administered prescription drugs. In 2022, Medicare provided health insurance for 65.0 million individuals—more than 57 million people aged 65 and older and about 8 million younger people. According to annual Medicare Trustees reports and research by Congress' MedPAC group, Medicare covers about half of healthcare expenses of those enrolled.”
- 2A comparison of behavioral health service use among dually eligible, Medicaid-only, and Medicare-only beneficiaries.BMC health services research (Karakus et al.)Published Jul 9, 2026Checked Oct 11, 2026
“Individuals with a BH diagnosis were classified into mutually exclusive coverage cohorts: Medicaid-only, Medicare-only, and dually eligible. Cohorts were further stratified into diagnostic groups: mental health (MH)-only, substance use disorder (SUD)-only, co-occurring MH/SUD.ResultsWe identified 147,426,385 individuals enrolled in Medicaid and/or Medicare. 8.7% were dually eligible, 55.8% were Medicaid-only, and 35.5% were Medicare-only. Dually eligible beneficiaries had the highest prevalence of BH diagnoses. Dually eligible individuals had the highest rates of service utilization. Medicare-only beneficiaries had the lowest utilization rates. Medicaid-only beneficiaries showed intermediate levels of use. Within the dually eligible group, adults 18-54, males (for SUD), White beneficiaries, and urban residents had the highest utilization rates.ConclusionsDually eligible individuals exhibit higher BH service utilization, as compared to Medicaid-only and Medicare -only beneficiaries, suggesting elevated treatment needs.”
- 3Cardiovascular Multimorbidity and Associated Mortality Among Medicare Beneficiaries Dually Eligible for Medicaid.Journal of the American Heart Association (Kalapura et al.)Published Jul 31, 2026Checked Oct 11, 2026
“Our primary exposure was Medicaid dual eligibility. The primary outcomes were the development of incident CVD or cardiovascular multimorbidity (defined as ≥2 of the following conditions: stroke/transient ischemic attack, myocardial infarction, atrial fibrillation, heart failure, and chronic ischemic heart disease). The secondary outcome was death. Multistate survival models were used to estimate hazards of progression from no CVD comorbidity to incident CVD, CVD multimorbidity, and death before and after adjustment for demographics and medical comorbidity burden.ResultsIn total, 2 189 382 patients (12.9% of whom were dual eligible for Medicaid) were included. Over a median 5 years of follow-up, non-dual-eligible beneficiaries had 1 more year of survival free from CVD than dual-eligible beneficiaries (4.89 versus 5.95 years).ConclusionsDual-eligible beneficiaries were more likely to develop CVD and multimorbidity and had higher mortality rates before and after adjustment.”
- 4Enrollment in Integrated Special Needs Plans Among Dually Eligible Beneficiaries With Serious Mental Illness.JAMA network open (McGinty et al.)Published Jun 1, 2026Checked Oct 11, 2026
“The proportion of dually eligible beneficiaries with SMI enrolled in integrated HIDE-SNPs or FIDE-SNPs increased from 2.4% in 2019 to 17.2% in 2022, with a corresponding decrease in traditional Medicare enrollment from 58.6% to 42.6% in the same period. Cardiovascular disease (CVD), which is associated with excess mortality in SMI, was prevalent: 32.1% of beneficiaries had 3 CVD risk factors. More than half of states had no integrated D-SNP offerings, including states ranked highest for prevalence of comorbid CVD among dually eligible beneficiaries with SMI. A total of 10.3% of dually eligible beneficiaries with SMI enrolled in HIDE-SNPs and 6.1% of beneficiaries enrolled in FIDE-SNPs in 2021 disenrolled by 2022, relative to 20.9% disenrollment from standard MA.Conclusions and relevanceThis retrospective cohort study of dually eligible beneficiaries with SMI found increases in integrated D-SNP enrollment and limited disenrollment, which may suggest a high level of enrollee satisfaction. More research is needed to assess the association of integrated D-SNP enrollment with health outcomes among dually eligible beneficiaries with SMI.”
How it changed
Published 1 time since Oct 11, 2026.
- Version 2Oct 11, 2026Live now
AI-prepared Starting Map from live research.
- First published version.
Help improve it
The brief is open about what's uncertain. These are the specific gaps that new material would fill.
Open questions
What are Medicaid's specific eligibility thresholds, federal-state funding split, and mandatory covered benefits, and how do they vary by state?
No answers yet
Do the worse cardiovascular and mortality outcomes among dual-eligible beneficiaries reflect the coverage arrangement itself, or the underlying health and social circumstances that make people eligible for both?
No answers yet
Does enrollment in integrated special needs plans improve health outcomes for dually eligible beneficiaries with serious mental illness, as the authors of that study say remains unassessed?
No answers yet
Around this topic
Sylos connect: narrower topics report up to broader ones, so what's learned in one place shows up where it matters.