GLP-1 medications are transformative — and expensive. Brand-name Wegovy costs over $1,100/month without coverage. Mounjaro runs $1,000+. For most people, whether insurance covers their GLP-1 drug isn't a minor question. It determines whether treatment is financially possible at all.
Here's the honest breakdown of how coverage works in 2026 — across commercial insurance, Medicare, and Medicaid — and what you can actually do if your plan says no.
Commercial Insurance (Employer-Sponsored Plans)
This is where you're most likely to get coverage, but it's not guaranteed.
Many large employers now include Wegovy (semaglutide) and Zepbound (tirzepatide) on their drug formularies for obesity treatment. Requirements typically include:
- BMI ≥30, or BMI ≥27 with at least one weight-related comorbidity (hypertension, sleep apnea, type 2 diabetes, high cholesterol)
- Prior authorization from your physician documenting medical necessity
- Documentation that lifestyle modifications (diet, exercise) have been attempted
Ozempic and Mounjaro — the diabetes-labeled versions of the same drugs — have broader commercial formulary coverage but are officially approved for type 2 diabetes, not obesity. Some plans cover them off-label for weight loss; most don't, and off-label coverage is increasingly scrutinized.
Medicare
This is the current gap that affects millions of older Americans. Medicare Part D covers Ozempic for type 2 diabetes but does not yet cover anti-obesity medications like Wegovy for weight loss alone. The Treat and Reduce Obesity Act has been introduced in Congress repeatedly — if it passes, it would require Medicare to cover GLP-1 drugs for obesity. As of 2026, it has not passed.
If you're on Medicare and want GLP-1 treatment for weight loss, your options are compounded semaglutide (cash-pay), patient assistance programs from Novo Nordisk or Eli Lilly, or a manufacturer coupon if you have any supplemental coverage.
Medicaid
Coverage varies dramatically by state. Some state Medicaid programs — including California Medi-Cal, Illinois Medicaid, and several others — now cover Wegovy for obesity treatment. Many do not. Ozempic for type 2 diabetes is more broadly covered across state Medicaid plans.
Your best path: call your state Medicaid plan's pharmacy benefits line and ask specifically about "semaglutide for obesity" or "tirzepatide for obesity." Have your BMI and diagnosis code handy.
How to Get Prior Authorization Approved
Most commercial plans require prior authorization (PA) for GLP-1 weight loss drugs. The clinic you work with typically handles this process, but you should know what it involves:
- Step 1: Your physician documents your BMI, diagnosis (obesity, E66.01), and any comorbidities
- Step 2: PA submitted to your insurer with a letter of medical necessity
- Step 3: Insurer may require "step therapy" — proving you've tried a cheaper weight loss drug first (usually phentermine or orlistat)
- Step 4: Approval or denial. Denials can be appealed — approximately 40-60% of denied GLP-1 PAs are approved on appeal
When choosing a clinic, ask specifically: "Do you handle prior authorizations in-house, and do you have experience getting GLP-1 PAs approved with [your insurer]?" This is one of the most valuable things a physician-supervised program offers that telehealth-only services often can't.
What If Your Insurance Won't Cover It?
You have real options beyond just paying full price:
- Manufacturer savings programs: Novo Nordisk's Wegovy WeightLoss.com savings card and Eli Lilly's savings card can bring monthly cost to $25–$0 for commercially insured patients who qualify
- Compounded semaglutide: $150–$350/month through licensed 503B compounding pharmacies — the same active ingredient, significantly lower cost. Availability depends on FDA shortage status
- Patient assistance programs: Both Novo Nordisk and Eli Lilly have programs for uninsured or underinsured patients who meet income requirements
- Appeal your denial: Ask your physician to write a strong letter of medical necessity citing relevant comorbidities. First-level appeals succeed more often than people expect