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Mounjaro Part D plan comparison and spending tracker

Compare Part D plans for Mounjaro during open enrollment, record the tier and prior authorization rules of the plan you pick, and track each fill against the yearly cap. Facts from CMS and Medicare.gov give the standard amounts and the rules for the payment option and the GLP-1 Bridge.

Companion to “Mounjaro Medicare Part D Coverage: What You Actually Pay in 2026” · healthrx.com/access-mounjaro/medicare-part-d · Facts checked 2026-10-18

Plan Finder comparison (enter Mounjaro and your dose)

PlanMounjaro tierPrior authorization or step therapyDeductiblePreferred pharmacyEstimated yearly cost

The plan you chose

Plan name and member ID
Mounjaro tier and cost per fill
Prior authorization approved on, and valid until
Diagnosis on the requesttype 2 diabetes
Payment plan joined?date, if yes

Fills counted toward the yearly cap

Fill dateAmount you owedRunning totalPlan statement checked?

Standard amounts and rules

  • 2026: the standard deductible is $615 and covered drug costs are capped at $2,100.[1]
  • 2027: CMS set the standard deductible at $700 and the cap at $2,400.[2]
  • The Medicare Prescription Payment Plan has no cost to join; it spreads payments but does not lower them.[3]
  • People with type 2 diabetes are not eligible for the Medicare GLP-1 Bridge; their Part D plan might cover the GLP-1.[4]
  • From July 1, 2026 the Bridge covers Zepbound KwikPen, not Mounjaro, for eligible weight-only use, at $50 for a one-month supply.[4]

Ask the plan

  1. Which tier is Mounjaro on, and what does a fill cost before and after the deductible?
  2. What does the prior authorization ask for, and does it include step therapy?
  3. Which pharmacies are preferred for this drug, including mail order?
  4. How do I join the Medicare Prescription Payment Plan, and when does the first bill come?
  5. If Mounjaro is off the formulary next year, how do I request an exception?
Sources for the facts on this sheet
  1. Centers for Medicare & Medicaid Services. Announcement of Calendar Year (CY) 2026 Medicare Advantage (MA) Capitation Rates and Part C and Part D Payment Policies. Accessed 2026-10-18. https://www.cms.gov/files/document/2026-announcement.pdf
  2. Centers for Medicare & Medicaid Services. Announcement of Calendar Year (CY) 2027 Medicare Advantage (MA) Capitation Rates and Part C and Part D Payment Policies. Accessed 2026-10-18. https://www.cms.gov/files/document/2027-announcement.pdf
  3. Centers for Medicare & Medicaid Services, Medicare.gov. What's the Medicare Prescription Payment Plan? | Medicare. Accessed 2026-10-18. https://www.medicare.gov/prescription-payment-plan
  4. Centers for Medicare & Medicaid Services, Medicare.gov. Weight loss drugs | Medicare. Accessed 2026-10-18. https://www.medicare.gov/coverage/weight-loss-drugs

This sheet records information for a conversation with your prescriber or pharmacist. It does not replace their instructions or the medication's prescribing information.