Leqembi (lecanemab) Medicare coverage in 2026.
Leqembi treats Early Alzheimer's disease. Retail cost runs about $4900/month. How Medicare covers it depends on your Part D or Medicare Advantage plan — and the new $2,000 annual out-of-pocket cap makes a huge difference for high-cost drugs.
Leqembi on Medicare — the basics
The 2026 $2,000 Part D cap and you
For 2026, Medicare introduces a brand-new $2,000 annual out-of-pocket cap on covered prescription drugs. This is one of the most significant changes to Medicare in decades.
For a drug like Leqembi retailing at $4900/month ($58800/year), here's what your annual out-of-pocket looks like:
- Without Medicare: $58,800 per year (full retail).
- With Medicare Part D in 2026: Maximum $2,000 out-of-pocket. That is $56,800 per year less than retail.
- Your actual copay depends on your specific Part D plan's tier placement and benefit design.
Office-administered Part B drug (every-2-week IV infusion) — covered for confirmed amyloid-positive early Alzheimer's. Medigap covers the 20%. Coverage requires CMS-required care plan + cognitive assessment registry enrollment.
Common questions
Does Medicare cover Leqembi?
Yes — Leqembi is covered under Medicare Part D (or Part B for office-administered drugs) for FDA-approved indications including early alzheimer's disease. Plan formularies and tier placement vary, so the right Part D plan can dramatically lower your cost.
How do I find which Part D plan covers Leqembi cheapest?
Use our free plan finder or call (866) 534-1886 — a licensed advisor checks every plan in your ZIP, runs Leqembi through each formulary, and shows you the lowest-cost option in 14 minutes.
Will the $2,000 cap apply if I'm on multiple expensive drugs?
Yes — the $2,000 cap is a single annual ceiling across all your covered Part D drugs combined. Once you hit $2,000 in OOP, you pay $0 for any additional covered prescriptions for the rest of the year.
What if Leqembi isn't on my plan's formulary?
You can request a coverage exception (your doctor submits paperwork explaining why Leqembi is medically necessary). If denied, you can switch plans at the next AEP (Oct 15 – Dec 7) or during a Special Enrollment Period.
Get the lowest-cost Part D plan for Leqembi.
A licensed advisor runs Leqembi through every Part D plan in your ZIP. Free, 14 min.
Call (866) 534-1886