Glossary
Dual Eligible (Medicare & Medicaid)
People enrolled in both Medicare and Medicaid — Medicaid pays Medicare premiums and cost-sharing, and may cover services Medicare does not.
Also known as: dual eligibility, Medicare-Medicaid, duals
Quick answer
Dual-eligible beneficiaries have both Medicare (because of age or disability) and Medicaid (because of income/asset limits set by the state). Medicaid generally pays the Part B premium, deductibles, and coinsurance.
Why it matters
For low-income retirees, dual eligibility eliminates almost all out-of-pocket costs and qualifies them for Extra Help with Part D.
Why this matters at age 65
Some military retirees on disability pensions or with limited income qualify but never apply. TFL does not replace Medicaid — Medicaid can layer on as a third payer.
When you'll encounter it
When household income/assets are low enough to qualify under your state's Medicaid thresholds.
Impact on Medicare
No change to Medicare benefits — but cost-sharing is largely paid by Medicaid.
Impact on TRICARE For Life
TFL remains active; payment order is Medicare → Medicaid (for Medicare-covered services) → TFL, with TFL typically paying little because the first two clear most balances.
Impact on Medicare Advantage
Special Needs Plans (D-SNPs) are designed for dual eligibles and may be a good fit — but rarely needed when TFL is already in place.
VA Healthcare considerations
VA care is separate; using VA does not affect Medicaid eligibility, though VA income counts toward Medicaid limits.
Common misconceptions
- "TFL means I can't also have Medicaid." — You can have both; they coordinate.
Common mistakes to avoid
- Not applying because the retiree assumes TFL disqualifies them.
- Enrolling in a D-SNP without realizing TFL already covers most cost-sharing.
What should I do?
- 1Check your state's Medicaid income/asset thresholds (varies widely).
- 2Apply via your state Medicaid office or your local SHIP counselor.
- 3Apply for Extra Help (LIS) — dual eligibles qualify automatically.
Continue learning
— suggested by the knowledge graph- Frequently asked questions about Medicare and TRICARE For LifeA quick-reference summary of the questions retired service members and spouses ask most often — with citations to the official source.
- Common mistakes retired military make at 65 — and how to avoid themThe most expensive errors retired service members and spouses make during the Medicare and TFL transition, and the simple fixes for each.
- Enrolling in Medicare: timing, methods, and the military-specific rulesWhen and how to sign up for Medicare Parts A and B — and the timing that protects your TRICARE For Life activation.
- Understanding Original Medicare (Parts A & B) for veteransExactly what Part A and Part B cover, what they cost in 2026, and why both are required to keep TRICARE For Life.
- Durable Medical Equipment (DME)Medically necessary, reusable equipment for home use — covered by Part B at 80% after the deductible.
- Qualified Disabled and Working Individual (QDWI)An MSP that pays the Part A premium for working disabled individuals under 65 who lost premium-free Part A due to returning to work.
- Qualifying Individual (QI) ProgramAn MSP that pays the Part B premium for beneficiaries with income slightly above the SLMB threshold — funded on a first-come, first-served basis.
- Specified Low-Income Medicare Beneficiary (SLMB)An MSP that pays the Part B premium for beneficiaries with income slightly above the QMB threshold.
- Balance BillingThe practice of a provider billing you for the difference between their charge and what insurance approved.
- Benefit Period (Part A)The Part A timeframe used to measure hospital deductibles and coinsurance — it resets after 60 days out of the hospital.
- Billing ErrorsMistakes — accidental or intentional — on Medicare or TFL claims, ranging from duplicate charges to outright fraud.
- Brand-Name DrugsFDA-approved drugs sold under a manufacturer's proprietary name — middle copay tier on the TRICARE formulary.
- How much does Medicare Part B cost?Most people pay the standard Part B premium (roughly $185/month in 2026). Higher-income retirees pay IRMAA on top. Lower-income retirees may qualify for help paying it.
- Does TRICARE For Life work overseas?Yes. Overseas, TFL acts as your primary payer because Medicare generally doesn't pay outside the U.S. You'll usually pay the provider up front and file a paper claim with TFL overseas.
- What are the biggest mistakes retired military make at 65?Declining Part B, missing the IEP, ignoring DEERS, enrolling in Part D unnecessarily, and assuming MTF access continues. Each can cost thousands or end TFL.
- Can my state help pay my Part B premium?If your income is low enough, yes. Medicare Savings Programs (QMB, SLMB, QI) pay the Part B premium for qualifying beneficiaries. Apply through your state Medicaid office.
- Why did one extra dollar of income raise my Part B premium hundreds of dollars?IRMAA uses cliff thresholds, not gradual tiers. Crossing a bracket by even $1 jumps you to the next premium amount for the entire year.
Related glossary terms
Related Official Resources
Continue learning straight from the source. Every link below goes to an official government or DoD resource.
Last reviewed January 2026 against the 2026 Medicare & You and TRICARE For Life handbooks.