Does Medicare cover Mounjaro in Oregon?

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?

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 Does Medicare cover weight-loss drugs?

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.
• 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

The Medicare Prescription Payment Plan lets you pay your Part D drug costs in monthly bills from your plan across the calendar year instead of all at once at the pharmacy. Medicare.gov says there's no cost to participate, 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 OHP (Medicaid), a Medicare Savings Program or SSI; otherwise apply through Social Security at 1-800-772-1213 or ssa.gov/extrahelp. See Extra Help in Oregon.

Getting Mounjaro covered in Oregon

If you have both Medicare and OHP, OHP doesn't pay for drugs that Part D covers. The Oregon Health Authority calls this "OHP with Limited Drug": you need a Part D plan (or a Medicare Advantage plan with drug coverage) for Mounjaro, and you qualify for Extra Help automatically. See OHP and Medicare.

Oregon and Washington share Part D region 30, so standalone Part D plans are offered region-wide. For 2027, Oregon has 8 standalone Part D plans from 4 companies, plus Medicare Advantage plans with drug coverage in most counties (61 open to everyone statewide). Each plan has its own formulary, so one plan's coverage of Mounjaro tells you nothing about another's.

Where you live in Oregon changes your choices. CMS data show no Medicare Advantage plan open to everyone in Grant, Harney, Lake, Umatilla or Union counties for 2027 (only employer group plans), and only a special needs plan in Curry County. If you live there, coverage for Mounjaro usually comes from a standalone Part D plan alongside Original Medicare, unless you have employer or other drug coverage. Check your county's numbers on Oregon counties.

How to check whether a plan covers Mounjaro

1. Write down the exact drug. Name, strength and how often you take it. A plan can cover one form of Mounjaro and not another.
2. 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.
3. 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.
4. 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.
5. 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 Oregon?

Sources

• National Library of Medicine — DailyMed: Mounjaro prescribing information (FDA label)
• Medicare.gov — Drug coverage (Part D)
• Medicare.gov — Medicare GLP-1 Bridge
• CMS — Medicare GLP-1 Bridge (July 1, 2026 – 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 — Part D plan files record layout (PDP Region 30: Oregon, Washington)
• Oregon Health Authority — OHP and Medicare

Frequently asked questions

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