Glossary
Step Therapy
A TRICARE Pharmacy rule that requires you to try a cheaper or first-line drug before a more expensive alternative is covered.
Also known as: fail first, step edit
Quick answer
Step therapy is a coverage-control rule requiring a beneficiary to first try a designated first-line drug (or drugs) before TRICARE Pharmacy will cover a more expensive second-line option. Documentation of failed first-line therapy is required to advance the 'step.'
Why it matters
Step therapy can delay access to the drug your prescriber actually wants you on. Understanding the rule lets you plan: either complete the step-therapy trial or ask the prescriber to document a clinical exception immediately.
When you'll encounter it
Common in classes like GLP-1 agonists, biologics, PPIs, statins, and migraine preventives.
Impact on Medicare
None.
Impact on TRICARE For Life
Same step-therapy rules apply at every TRICARE Pharmacy access point.
Impact on Medicare Advantage
MA-PD plans use step therapy heavily. TFL's step rules and the MA-PD plan's step rules are independent.
Military-specific context
Step-therapy criteria are published in the Express Scripts PA criteria library. Many requests are approved on first submission if the prescriber documents prior therapy in another insurer's records.
Common misconceptions
- "Step therapy means I have to suffer through a bad drug." — If the first-line drug is clinically inappropriate or contraindicated, your prescriber can request an immediate step-therapy override.
Common mistakes to avoid
- Refusing the first-line drug without documenting clinical reasons — then being denied the second-line.
Real-world scenario: A retiree's GI specialist prescribes a brand PPI.
TRICARE step therapy requires a trial of generic omeprazole first. The specialist documents prior omeprazole failure from another insurer's records; the brand is approved without delay.
What should I do?
- 1Ask the prescriber to document any prior failed therapies in the chart.
- 2If a first-line trial isn't clinically appropriate, request a step-therapy override.
Continue learning
— suggested by the knowledge graph- Prescription drug coverage under TRICARE For LifeWhy TFL beneficiaries use TRICARE Pharmacy (Express Scripts), not Medicare Part D — and how the four pharmacy options compare.
- 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.
- Brand-Name DrugsFDA-approved drugs sold under a manufacturer's proprietary name — middle copay tier on the TRICARE formulary.
- Creditable Drug CoveragePrescription drug coverage that CMS certifies is at least as good as standard Medicare Part D — including TRICARE Pharmacy and VA Pharmacy.
- Express ScriptsThe pharmacy benefit manager that administers the TRICARE Pharmacy Program, including TFL home-delivery and retail-network prescriptions.
- Generic DrugsChemically identical, FDA-approved equivalents of brand-name drugs — the lowest copay tier under TRICARE 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.
- Non-Formulary DrugsDrugs not on the TRICARE preferred list — highest copay tier, often requires Medical Necessity approval.
- 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 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.
- Does TFL cover preventive care like flu shots and screenings?Yes. Medicare covers most preventive services at $0 when provided by a Medicare-participating provider, and TFL adds no additional cost.
- What does TRICARE For Life actually cover?TFL is a wraparound. For services Medicare and TFL both cover, TFL pays nearly all remaining cost-shares. For Medicare-only services, TFL still acts as secondary. For TFL-only services (very few), TFL pays as primary.
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.