Checking coverage
Medicare has different routes for different uses.
Medicare’s benefit for prescription drugs is called Part D. The reason a medicine is prescribed can change which route applies.
To begin
Ordinary Part D and weight loss
Under ordinary Part D, medicines prescribed for weight loss or weight gain are excluded, as of September 2026.
For another accepted medical use, Part D may cover that same medicine; the plan’s coverage rules still apply, as of September 2026.
Look a little closer
The temporary Bridge program
The copay is the medicine payment you make under the Bridge.
For eligible Medicare Part D members using the GLP-1 Bridge, the copay as of September 2026 is $50 for a one-month supply of certain weight-loss medicines.
GLP-1 medicines mimic a hormone: a chemical signal the body makes to help regulate blood sugar and hunger.
As of September 2026, the Bridge runs from July 1, 2026, through its end date of December 31, 2027.
The Bridge handles approval and pharmacy payments separately from your usual Part D plan, as of September 2026. It does not change the rule excluding weight-loss use from ordinary Part D.
As of September 2026, paying the Bridge’s $50 leaves both your Part D deductible and your yearly spending limit unchanged. A deductible is what you pay before certain plan benefits start; the spending limit caps your own covered drug costs.
Look a little closer
Who can use the Bridge?
As of September 2026, you need a prescription and a qualifying Medicare drug plan. The person prescribing it must ask the Bridge to approve payment first; this is called prior authorization. The prescription must go with an ongoing plan for eating and physical activity.
The age rule is 18 or older, so being 80 does not fail that rule. The weight and health rules below apply when you first began this kind of medicine. BMI uses height and weight to produce a number; ask your doctor for yours.
A BMI of at least 35.
BMI of 30 or more with a qualifying kind of heart failure or kidney disease, or high blood pressure despite two blood-pressure medicines.
BMI of 27 or more with pre-diabetes, a past stroke or heart attack, or limb symptoms from artery disease.
For the middle group, the heart diagnosis is called heart failure with preserved ejection fraction. The kidney disease must be at stage 3a or later. The blood-pressure rule is met when, despite two medicines, either the top number is above 140 or the bottom number is above 90. Your doctor can match your records to these rules.
As of September 2026, having type 2 diabetes excludes you from the Bridge, even if you want the medicine for weight loss. Ask your Part D plan about coverage for treating diabetes instead. Certain sleep-breathing and liver conditions also exclude people; the official eligibility page below lists them.
As of September 2026, a prescription meant to lower the chance of a stroke or heart attack also goes to your usual Part D plan.
If Part D paid for any GLP-1 prescription you received earlier in 2026, you cannot use the Bridge for the rest of 2026. This applies to any medicine in that group, not just the one you now want.
Ask the person prescribing it and your plan which payment route fits your health problem. Check the official list for the exact medicine and form, such as a tablet or an injection pen.
Chapter recap
Keep this in mind.
Ask about ordinary Part D and the Bridge separately. The price, eligibility, and payment rules are different.