Glossary
TRICARE Pharmacy Program
The DoD prescription drug benefit administered by Express Scripts — your drug coverage if you have TFL.
Also known as: TRICARE Pharmacy, TPharm
Quick answer
The TRICARE Pharmacy Program is the DoD's prescription drug benefit, administered by Express Scripts under contract with the Defense Health Agency. It provides prescriptions through four points of service: military pharmacies (MTF — $0 for formulary drugs), TRICARE Home Delivery (mail order — lowest retail-equivalent cost), TRICARE retail network pharmacies (in-network — low copay), and non-network pharmacies (highest cost, often requires manual claim filing).
Why it matters
TRICARE Pharmacy is certified by CMS as creditable coverage for Medicare Part D. That is why TFL beneficiaries do not need Part D and face no Part D late-enrollment penalty.
Why this matters at age 65
At 65, your TRICARE Pharmacy benefit continues unchanged — same Express Scripts ID, same formulary, same copays. Do not enroll in a standalone Part D plan and do not let a Medicare Advantage Part D plan replace TRICARE Pharmacy. Keep the annual Creditable Coverage Notice from Express Scripts in case you ever need to prove your status.
When you'll encounter it
Every prescription you fill after age 65.
Impact on Medicare
Independent of Medicare. Pharmacy claims do not crossover; they are processed entirely by Express Scripts.
Impact on TRICARE For Life
Bundled with TFL — same eligibility requirements (Medicare A and B plus current DEERS).
Impact on Medicare Advantage
If you join an MA-PD plan, you can use TRICARE Pharmacy and the MA-PD drug benefit in parallel. Compare per-drug pricing — TRICARE Home Delivery is usually cheaper for maintenance generics.
VA Healthcare considerations
VA pharmacy is also creditable for Part D. Many retirees fill service-connected medications at VA and everything else through Express Scripts Home Delivery.
Military-specific context
Express Scripts has been the TRICARE pharmacy contractor for years and uses the standard TRICARE formulary published by DHA. Formulary changes are announced quarterly on tricare.mil/Pharmacy and reflected in your home-delivery account.
Common misconceptions
- "TFL covers my drugs." — TFL covers medical claims. Prescription drugs go through the TRICARE Pharmacy Program — a parallel benefit.
- "I should enroll in Part D to be safe." — Enrolling in a standalone Part D plan can disrupt how pharmacies bill your TRICARE benefit and offers no added protection.
Common mistakes to avoid
- Letting a pharmacy bill a Part D plan instead of TRICARE because the plan card was on file first.
- Moving from network retail to a non-network pharmacy without realizing the copay difference.
- Filling 90-day maintenance medications at retail instead of using Home Delivery — Home Delivery is typically far cheaper.
Real-world scenario: A retired Marine on TFL fills a 90-day supply of atorvastatin.
Through TRICARE Home Delivery, the copay is $12. The same script at retail network would be ~$13 for 30 days ($39 for 90). She also receives the annual Express Scripts Creditable Coverage Notice each fall — proving she's protected from a Part D late penalty.
What should I do?
- 1Confirm DEERS and your Medicare A & B are active — both are required to use TRICARE Pharmacy on TFL.
- 2Move all 90-day maintenance medications to TRICARE Home Delivery for the lowest copay.
- 3Save the annual Creditable Coverage Notice Express Scripts mails each fall.
- 4Do NOT enroll in a standalone Medicare Part D plan; do not let an MA-PD plan replace TRICARE Pharmacy on the pharmacy's billing screen.
- 5If a drug is denied as non-formulary, ask the prescriber to file a Medical Necessity request through Express Scripts.
Questions people commonly ask
- Do I need a Part D drug plan if I have TRICARE?
- How do I switch my maintenance meds to Home Delivery?
- Will Medicare Advantage replace my TRICARE Pharmacy?
Continue learning
— suggested by the knowledge graph- What is TRICARE For Life? The complete guide for retired militaryThe Medicare-wraparound benefit you earned through service — what it covers, who qualifies, what it costs, and how it activates.
- How Medicare and TRICARE For Life work togetherThe exact mechanics of who pays first, who pays second, and what you owe — for every common care scenario.
- Using military hospitals and clinics (MTFs) after age 65What changes about Military Treatment Facility access once you become Medicare-eligible — and how to plan for the transition.
- Brand-Name DrugsFDA-approved drugs sold under a manufacturer's proprietary name — middle copay tier on the TRICARE formulary.
- Defense Health Agency (DHA)The DoD combat support agency that runs the Military Health System and administers TRICARE, including TRICARE For Life.
- Generic DrugsChemically identical, FDA-approved equivalents of brand-name drugs — the lowest copay tier under TRICARE Pharmacy.
- Medical NecessityA documented clinical justification that a non-formulary or restricted drug is required — allowing TRICARE to cover it at a lower tier.
- Medicare Part D and TFLWhy TFL beneficiaries do not need (and usually should not enroll in) a standalone Medicare Part D plan.
- Military Pharmacy (MTF Pharmacy)Pharmacies operated inside Military Treatment Facilities — fills formulary drugs at $0 copay for TFL beneficiaries.
- Should I enroll in Medicare Part D?No, for almost every TFL beneficiary. TRICARE Pharmacy (Express Scripts) is creditable coverage and cheaper than most Part D plans. Adding Part D usually costs more without adding benefit.
- Where can I fill prescriptions on TFL?MTF pharmacy (free), TRICARE Pharmacy Home Delivery (Express Scripts, lowest copays for 90-day supplies), or any in-network retail pharmacy.
- What is 'creditable coverage' for Part D?Drug coverage that's at least as good as standard Part D. TRICARE Pharmacy is creditable, so you can skip Part D without owing a late-enrollment penalty later.
- What are the TRICARE Pharmacy copays for retirees?MTF pharmacy: $0. Home Delivery (90-day): low. Retail network (30-day): higher. Non-network: highest and requires a paper claim. Exact amounts adjust annually.
- Should I enroll in a Medicare Advantage plan that includes Part D (MAPD)?Only if the MA plan otherwise makes sense for you. The Part D piece duplicates TRICARE Pharmacy — but you keep TRICARE Pharmacy as a fallback. Don't enroll just for the drug coverage.
Related lessons
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.