What Mounjaro is used for
Mounjaro is a once-weekly injection that acts on two hormone receptors (GIP and GLP-1). Its FDA label covers improving blood sugar control in adults with type 2 diabetes, along with diet and exercise.
This page explains Medicare coverage only. Questions about whether Mounjaro is right for you belong with your prescriber.
Which part of Medicare covers Mounjaro
Mounjaro is a pen you use at home, so it's a Part D drug. Because federal law keeps weight-loss drugs out of Part D, plans may attach prior authorization to GLP-1-type drugs to confirm a diabetes diagnosis. Your prescriber can usually handle that with the plan directly.
Is Mounjaro on Medicare's negotiated-price list?
No. Mounjaro is not among the drugs CMS has selected for the Medicare Drug Price Negotiation Program so far: the 10 drugs with negotiated prices for 2026, the 15 for 2027 and the 15 selected in January 2026 for 2028.
Mounjaro vs. Zepbound under Medicare
Both contain tirzepatide, but Medicare treats them as different products:
- Mounjaro: covered by Part D plans that list it, for type 2 diabetes.
- Zepbound for sleep apnea: Zepbound is FDA-approved for moderate to severe obstructive sleep apnea in adults with obesity, a use that isn't weight loss alone, so a Part D plan can cover it for that if it's on the formulary.
- Zepbound for weight management: not covered by Part D plans, but the Zepbound KwikPen is one of the drugs in the Medicare GLP-1 Bridge (July 1, 2026, to December 31, 2027) for eligible people. People with type 2 diabetes or moderate to severe sleep apnea aren't eligible for the Bridge.
More in Zepbound.
What you pay for Mounjaro in 2027: the out-of-pocket cap
Your cost for Mounjaro depends on your plan: its deductible, the tier it puts the drug on, and whether you use a preferred pharmacy. This site doesn't list plan costs; your plan's formulary and Evidence of Coverage do. What Medicare sets for everyone with Part D is the limit:
- 2027 out-of-pocket cap: $2,400 (it was $2,100 in 2026). Once what you pay for covered Part D drugs (deductible, copays and coinsurance) reaches the cap, you pay nothing more for covered Part D drugs for the rest of 2027.
- The maximum Part D deductible for 2027 is $700. No plan can set a higher deductible, and some have none.
- Only covered drugs count. If your plan doesn't cover Mounjaro and you pay cash, or you use a discount card instead of your plan, that spending doesn't count toward the cap.
Spreading the cost: the Medicare Prescription Payment Plan
Every Part D plan and Medicare Advantage plan with drug coverage offers the Medicare Prescription Payment Plan. Instead of paying the pharmacy, you get a monthly bill from your plan that spreads your costs across the calendar year. Medicare.gov says there's no cost to participate and no interest, but it doesn't lower your drug costs; it only changes when you pay. It helps most when costs are high early in the year. To join, call your plan or use its website. More in What is the Medicare Prescription Payment Plan?
Extra Help with Mounjaro
Extra Help (the Low-Income Subsidy) is a federal program that lowers Part D premiums, deductibles and copays. For 2027, CMS caps Extra Help copays for covered drugs at $5.80 for a generic and $14.40 for a brand-name drug, and some people with full Medicaid pay less. You get Extra Help automatically if you have full Florida Medicaid, SSI or a Medicare Savings Program (QMB, SLMB or QI-1, which you apply for through ACCESS Florida). Otherwise, apply through Social Security at ssa.gov/extrahelp or 1-800-772-1213 (TTY 1-800-325-0778). See Extra Help in Florida and Medicare Savings Programs in Florida.
Getting Mounjaro covered in Florida
Florida is its own Part D region (PDP Region 11), so each standalone Part D plan sold here is offered in all 67 counties. For 2027, CMS lists 11 standalone Part D plans from 6 companies in Florida. Medicare Advantage choices depend on your county, from 7 plans in Monroe County to 52 in Hillsborough County, and most include drug coverage. Each plan has its own formulary, so one plan's coverage of Mounjaro tells you nothing about another's. Your county's numbers are on Florida counties.
- Full Florida Medicaid and Medicare: your prescriptions are paid by your Medicare drug coverage, not by Florida Medicaid, and Extra Help is automatic. Most people with full Medicaid, including those who also have Medicare, get their Medicaid services through a Statewide Medicaid Managed Care (SMMC) plan; that plan doesn't replace your Medicare drug coverage. See Florida Medicaid and Medicare.
- Florida state retirees: if you keep a State Group Insurance health plan as secondary coverage to Medicare, it includes prescription drug coverage that the State says Medicare approves as creditable, so you don't need a separate Part D plan. In one of the State's group Medicare Advantage (MA-PD) plans, your Mounjaro coverage comes from that plan's formulary. Ask People First before you join any outside Medicare plan. See Florida state retirees and Medicare.
- Snowbirds: a Florida Part D plan's service area is Florida. Ask your plan whether its pharmacy network includes pharmacies where you spend the rest of the year, or whether it offers mail order. A Part D plan must disenroll you if you're away from its service area for more than 12 months in a row. See prescriptions for snowbirds.
- Hurricanes: Florida law (s. 252.358) requires state-licensed insurers and HMOs to allow early refills when your county is under a hurricane warning or a state of emergency. Medicare drug plans follow federal rules: CMS expects them to allow early refills after a federal disaster declaration, and Medicare.gov says to contact your plan to replace drugs lost or damaged in a disaster, or to fill at an out-of-network pharmacy when you can't reach an in-network one. Mounjaro has storage-temperature limits on its label, so a long power outage can ruin your supply; keep your plan's and pharmacy's phone numbers with your hurricane supplies. See early prescription refills before a hurricane.
- If your Medicare Advantage plan ends in 2027: your plan sends a non-renewal letter, and you have a special enrollment period through February 28, 2027. To keep Mounjaro covered without a gap, choose new drug coverage by December 31, 2026. See plans ending in 2027.
Florida doesn't have a state drug-assistance program for seniors; Extra Help is the main help with Part D costs. See Does Florida have a state drug assistance program for seniors?
How to check whether a plan covers Mounjaro
- Write down the exact drug. Name, strength and how often you take it. A plan can cover one form or strength of Mounjaro and not another.
- Look it up in each plan's formulary. Enter your drugs and ZIP code on PlanMatch or Medicare.gov's Plan Finder to see which plans list Mounjaro and any rules.
- Read the rules next to the drug. Prior authorization, step therapy or quantity limits mean your prescriber may need to send the plan information before it pays.
- Check your 2027 notice. Your plan's Annual Notice of Change says whether Mounjaro stays on the formulary next year. Open Enrollment runs October 15 to December 7, 2026, for coverage starting January 1, 2027.
- Get help if you want it. You can request a call from a licensed insurance agent, who can compare plans from the companies they work with, or call 1-800-MEDICARE (1-800-633-4227, TTY 1-877-486-2048) for information on all of your options.
If your plan doesn't cover Mounjaro, you or your prescriber can ask for a coverage determination or a formulary exception. Once the plan has your prescriber's supporting statement, it generally must decide within 72 hours, or 24 hours if your prescriber says waiting could seriously harm your health. New members can usually get a one-time transition supply of a drug they were already taking while they ask for an exception or switch. See How do I appeal a Medicare denial in Florida?
Sources
- National Library of Medicine — DailyMed: Mounjaro prescribing information (FDA label)
- Medicare.gov — Drug coverage (Part D)
- Medicare.gov — Weight loss drugs (Medicare GLP-1 Bridge)
- CMS — Medicare GLP-1 Bridge (July 1, 2026, to December 31, 2027)
- CMS — Selected drugs and negotiated prices (Medicare Drug Price Negotiation Program)
- CMS — Selected drugs for initial price applicability year 2028 (fact sheet, January 2026)
- CMS — CY 2027 Rate Announcement (2027 Part D out-of-pocket threshold and Extra Help copays)
- Medicare.gov — Medicare Prescription Payment Plan
- Social Security — Extra Help with Medicare prescription drug plan costs
- CMS — Medicare Advantage and Part D Landscape files, 2027 (PDP Region 11: Florida)
- CMS — Replacing Durable Medical Equipment and Prescription Drugs after a Disaster
- Medicare.gov — Getting drugs in a disaster or emergency
- CMS — Pharmacy access during a federal disaster declaration: questions and answers for Part D plan sponsors
- Florida Statutes — s. 252.358, emergency prescription refills
- Florida Agency for Health Care Administration — Statewide Medicaid Managed Care
- Florida Division of State Group Insurance — Frequently asked questions for retirees (Part D and creditable coverage)
- eCFR — 42 CFR 423.44 (Part D disenrollment after 12 months out of the service area)
Frequently asked questions
Does Medicare cover Mounjaro for weight loss?
No. Part D can't cover drugs used for weight loss alone. Mounjaro is covered for type 2 diabetes; the Zepbound KwikPen for weight management is in the Medicare GLP-1 Bridge for eligible people through 2027.
Is Mounjaro on Medicare's negotiated-price list?
No. Tirzepatide isn't among the drugs CMS selected for negotiated prices in 2026, 2027 or 2028.
Does the 2027 Part D out-of-pocket cap apply to Mounjaro?
Yes, when your Part D plan covers Mounjaro. In 2027, once you've paid $2,400 for covered Part D drugs, you pay nothing more for covered Part D drugs for the rest of the year.
What if my plan doesn't cover Mounjaro?
Ask the plan for a coverage determination or formulary exception, with a supporting statement from your prescriber, or compare plans during Open Enrollment, October 15 to December 7. New members can usually get a transition fill while they ask.
Can I refill Mounjaro early when a hurricane is coming to Florida?
Call your plan. CMS expects Medicare drug plans to allow early refills after a federal disaster declaration. Florida's early-refill law covers state-licensed insurers and HMOs during a hurricane warning or state of emergency, but Medicare drug plans follow federal rules.
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