Glossary
TRICARE Formulary
The DoD's tiered list of prescription drugs covered by the TRICARE Pharmacy Program — what's covered, at what cost, and with what restrictions.
Also known as: TRICARE drug list, uniform formulary
Quick answer
The TRICARE formulary (also called the Uniform Formulary) is the official drug list maintained by the Defense Health Agency and administered by Express Scripts. Drugs are placed in tiers: generic, brand-name formulary, non-formulary, and excluded. The tier determines your copay and whether prior authorization or step therapy applies.
Why it matters
Your copay, your access points (MTF / Home Delivery / retail), and whether a drug requires extra paperwork are all dictated by the formulary. Knowing where your medications sit on the formulary is the single biggest cost-control move on TFL.
Why this matters at age 65
Most retirees discover at 65 that staying on the TRICARE formulary — rather than letting an MA-PD plan dictate drugs — produces dramatically lower out-of-pocket pharmacy spend. Check every maintenance drug on the formulary search tool before retirement.
When you'll encounter it
Every new prescription, every annual medication review, and any time a drug is denied or escalated to a higher copay.
Impact on Medicare
Independent of Medicare. The TRICARE formulary is not Medicare's formulary and is not Part D.
Impact on TRICARE For Life
Determines your copay tier and where you can fill (MTF, Home Delivery, retail network, non-network).
Impact on Medicare Advantage
If you enroll in MA-PD, that plan's formulary is separate. You can choose per-drug to use whichever benefit is cheaper.
VA Healthcare considerations
VA maintains its own National Formulary. Service-connected meds are usually cheapest at VA; non-service-connected meds typically cheapest through TRICARE Home Delivery.
Military-specific context
Tier and PA changes are published quarterly on militaryrx.express-scripts.com. Use the Formulary Search Tool to confirm tier, cost, and any restrictions before a doctor writes the prescription.
Common misconceptions
- "If my doctor prescribes it, TRICARE covers it." — Only if it's on the formulary or has approved Medical Necessity documentation.
- "Non-formulary means not covered." — Non-formulary drugs are usually covered at a higher tier copay, often with prior authorization.
Common mistakes to avoid
- Filling a non-formulary brand when a formulary generic equivalent exists.
- Not asking the prescriber for a Medical Necessity letter when a non-formulary drug is clinically required.
Real-world scenario: A retiree's cardiologist prescribes a brand-name non-formulary statin.
Express Scripts rejects the claim for prior authorization. The cardiologist faxes a Medical Necessity form documenting prior generic failures. The drug is approved at the brand-name formulary copay tier — saving the retiree about $200/month vs. paying cash.
What should I do?
- 1Search every maintenance drug on the TRICARE Formulary Search Tool before refilling.
- 2When a drug is non-formulary, ask the prescriber whether a formulary generic or therapeutic equivalent will work.
- 3If only the non-formulary drug is appropriate, request a Medical Necessity submission through Express Scripts.
- 4Review the quarterly formulary update notices Express Scripts sends — tier changes do happen.
Questions people commonly ask
- Is my drug on the TRICARE formulary?
- What's the difference between formulary and non-formulary?
- How do I appeal a non-formulary denial?
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.
- Creditable Drug CoveragePrescription drug coverage that CMS certifies is at least as good as standard Medicare Part D — including TRICARE Pharmacy and VA Pharmacy.
- 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.
- What if my drug isn't on the TRICARE formulary?Non-formulary drugs cost more. Your doctor can request a medical-necessity exception so it's covered at the formulary copay.
- 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.
- Who pays first, Medicare or TRICARE For Life?Medicare pays first for any service it covers. TFL pays second. The claim usually crosses over automatically — you should never pay out of pocket up front.
- Is there an enrollment fee for TRICARE For Life?No. TFL has no enrollment fee and no monthly premium. The only premium you pay is for Medicare Part B.
- 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.