A dual-eligible patient is someone who qualifies for both Medicare and Medicaid at the same time. In 2021, about 13.1 million people in the United States, roughly 1 in 5 Medicare beneficiaries, fell into this category. These individuals typically have low incomes and are either 65 or older or living with a disability, which is why they meet the requirements for both programs simultaneously.
How Someone Qualifies for Both Programs
Medicare eligibility comes first for most dual-eligible individuals. You qualify for Medicare by turning 65 or by receiving Social Security disability benefits. That covers the Medicare side. The Medicaid side is where income and financial resources come into play.
There are two main pathways into Medicaid for someone already on Medicare. The first is through standard Medicaid eligibility for seniors and people with disabilities. This requires meeting your state’s income limits and, in most states, demonstrating that you have limited savings and other financial assets. The second pathway is through Medicare Savings Programs, which are specifically designed to help Medicare beneficiaries with lower incomes cover their Medicare costs. Federal law requires states to enroll eligible Medicare beneficiaries in these programs.
People who receive Supplemental Security Income (SSI) are automatically enrolled in Medicaid in most states, which makes them dual-eligible if they also have Medicare.
Full-Benefit vs. Partial-Benefit Dual Eligibility
Not all dual-eligible individuals receive the same level of coverage. The distinction between “full-benefit” and “partial-benefit” matters significantly in terms of what services you can access.
Full-benefit dual-eligible individuals are enrolled in a Medicaid eligibility pathway beyond just the Medicare Savings Programs. They receive the complete range of Medicaid services their state offers, including long-term nursing home care, prescription drugs, eyeglasses, hearing aids, and dental coverage. These benefits go well beyond what Medicare covers on its own. For example, Medicare only pays for up to 100 days in a skilled nursing facility, while Medicaid can cover nursing home care indefinitely for those who qualify.
Partial-benefit dual-eligible individuals receive help only with specific Medicare costs through one of the Medicare Savings Programs. They don’t get the full Medicaid benefit package.
The Four Medicare Savings Programs
These programs serve as the partial-benefit side of dual eligibility. Each covers a different slice of Medicare costs:
- Qualified Medicare Beneficiary (QMB): Covers Part A premiums (if you don’t have premium-free Part A), Part B premiums, deductibles, coinsurance, and copayments for Medicare-covered services. This is the most comprehensive of the four.
- Specified Low-Income Medicare Beneficiary (SLMB): Covers Part B premiums only. You need both Part A and Part B to qualify.
- Qualifying Individual (QI): Also covers Part B premiums, but is only available to people who don’t qualify for any other Medicaid coverage.
- Qualified Disabled and Working Individual (QDWI): Covers Part A premiums only, for people with disabilities who lost premium-free Part A because they returned to work.
How the Two Programs Split Costs
When someone has both Medicare and Medicaid, there’s a specific order for which program pays first. Medicare acts as the primary payer, covering costs up to its limits. Medicaid then steps in as the secondary payer, picking up remaining costs up to the state’s payment limit. This coordination of benefits means dual-eligible individuals often have little to no out-of-pocket costs for covered services.
Medicaid fills especially important gaps in Medicare coverage. Medicare doesn’t cover long-term custodial care in a nursing home, most dental work, routine eye exams and glasses, or hearing aids. For full-benefit dual-eligible individuals, Medicaid covers all of these.
Health and Demographics of This Population
Dual-eligible individuals tend to have significantly greater health needs than people on Medicare alone. Nearly half (47 percent) had at least one limitation in activities of daily living, things like bathing, dressing, or moving around independently. They were almost three times as likely to report being in poor health compared to Medicare-only beneficiaries (11 percent vs. 4 percent) and nearly four times as likely to live in a nursing facility or other institution (11 percent vs. 3 percent).
The population skews female (59 percent) and is more racially diverse than the broader Medicare population. Black beneficiaries made up 21 percent and Hispanic beneficiaries 18 percent of dual-eligible individuals, compared to 9 percent and 6 percent of Medicare-only beneficiaries. About one-third of all dual-eligible individuals did not graduate from high school, compared with 7 percent of non-dual Medicare beneficiaries. Most (79 percent) lived in urban areas.
Dual Special Needs Plans
Because managing two separate insurance programs can be confusing, a type of Medicare Advantage plan called a Dual Special Needs Plan (D-SNP) exists specifically for dual-eligible individuals. These plans coordinate benefits between Medicare and Medicaid in a single package, with care coordination services tailored to the specific health needs of this population. D-SNPs may also cover extra services beyond standard Medicare, such as additional hospital days for serious conditions like cancer or heart failure.
How to Apply
If you already have Medicare and think you might qualify for Medicaid based on your income and resources, you apply for Medicaid through your state’s Medical Assistance office. Each state sets its own income and asset thresholds, so the specific numbers vary depending on where you live. Some states have eliminated asset tests entirely, while others still require you to show limited savings.
If your income is slightly above your state’s Medicaid limit, some states allow a “spend down” process. This lets you subtract medical expenses you’ve already paid, like Medicare premiums and deductibles, from your countable income until it drops below the eligibility threshold. Your state Medicaid office can walk you through whether this option is available and how it works.