The short answer

If you're already taking a GLP-1, the BMI that matters for the $50 Medicare Bridge is the one you had when you started the medication — not your lower BMI today. Losing weight on the drug does not disqualify you.

This is one of the most common worries we hear from people already on Ozempic, Wegovy, or a compounded GLP-1: "I've lost 30 pounds — my BMI is under the cutoff now. Did I just lose my shot at the $50 price?" The reassuring answer, straight from the program's rules, is no. Here's exactly how it works.

Why your starting BMI is the one that counts

The Medicare GLP-1 Bridge uses clinical criteria — your BMI plus certain health conditions — but those criteria are assessed at the time you first started GLP-1 therapy, not on the day your doctor files the paperwork. Your prescriber attests on the prior-authorization form to your BMI and conditions at initiation.

CMS gives its own example: someone who started Wegovy in September 2024 with a BMI of 37, and who now has a BMI of 34 after losing weight, still qualifies under Tier 1 — because the prescriber documents the BMI of 37 from when therapy began (CMS Medicare GLP-1 Bridge).

In plain terms: the program rewards people for being on these medications — it doesn't penalize you for the weight loss that's the whole point.

It counts even if you started before Medicare — or before July 1

This is the second piece that surprises people. Eligibility includes beneficiaries who started GLP-1 therapy:

  • before they enrolled in Medicare Part D, and/or
  • before the Bridge launched on July 1, 2026.

So if you began a GLP-1 a year ago through private insurance, cash-pay, or a compounded version — and you're now on Medicare Part D — your earlier start date and starting BMI still count. You don't have to have begun under Medicare.

(Not sure which BMI tier you fell into when you started? Our 2-minute eligibility quiz walks through the tiers, and the full criteria are in who qualifies for the $50 Bridge.)

The three tiers — applied to your starting numbers

Your prescriber checks your situation at initiation against one of these:

  • Tier 1 — BMI 35 or higher, on its own.
  • Tier 2 — BMI 30 or higher with heart failure, hard-to-control high blood pressure, or chronic kidney disease.
  • Tier 3 — BMI 27 or higher with prediabetes, a prior heart attack or stroke, or symptomatic peripheral artery disease.

If your starting BMI and conditions met one of these, you're in — regardless of where your BMI sits today.

What you'll need to prove it

Because the form relies on your history, the key is documentation of where you started. Bring to your appointment:

  • Records showing your BMI (or height and weight) at the time you started the GLP-1 — old chart notes, a prior prescriber's records, or pharmacy history.
  • Documentation of any qualifying condition you had then.
  • Your Medicare card and Part D plan information.
  • The specific covered drug you want: Wegovy, the Zepbound KwikPen, or Foundayo (see which drugs the Bridge covers).

Our printable paperwork checklist covers the full list. The more clearly your doctor can document your starting point, the smoother the prior authorization goes.

A few important limits

  • This applies to the brand-name drugs in the Bridge. If you've been taking a compounded semaglutide or tirzepatide, you can switch to a covered brand-name drug under the Bridge — but the compounded version itself isn't covered.
  • Your doctor still submits the prior authorization to CMS's central processor (not your own Part D plan), and nothing can be filed before July 1, 2026.
  • Final eligibility is confirmed when CMS reviews the request. Always verify your specific situation with your doctor and your plan.

What to do now

If you're already on a GLP-1 and enrolled in Medicare Part D, you don't have to wait and worry:

  1. Dig up your starting records — when you began, and your BMI and conditions then.
  2. Book a visit and tell your doctor you want to be considered for the Medicare GLP-1 Bridge using your initiation BMI.
  3. Check your tier with the eligibility quiz, and read the Medicare & GLP-1 guide for the full picture.

The weight you've already lost is a good thing — and under the Bridge's rules, it doesn't cost you the $50 price.

Data note

Data as of June 2026, based on CMS's published Medicare GLP-1 Bridge eligibility rules (clinical criteria assessed at GLP-1 initiation). The Bridge launched July 1, 2026, and plans are still rolling out details. Confirm your eligibility with your doctor and your plan or at Medicare.gov; this is educational, not medical advice.