Check coverage for the medicine and its purpose
Part D is Medicare’s benefit for prescription medicines.
The medicines a plan covers appear on its list, called a formulary. With prior authorization, the insurer must review and agree to pay before you fill the prescription.
Ask the insurer about the exact product, the condition being treated, any approval step, and your share of the bill. Keep the response with the care estimate.
Medicare’s usual Part D plan cannot pay for a drug used only for weight loss, under the law checked September 26, 2026.
Part D may pay for that same medicine for a different accepted medical purpose, with diabetes as one example. The plan’s own rules still apply.
Another Medicare route is temporary
As of September 26, 2026, eligible Part D members can obtain certain weight medicines via the Medicare GLP-1 Bridge; their monthly share, or copayment, is $50.
The body makes GLP-1, a substance that helps manage blood sugar and hunger. That action is copied by semaglutide (sold as Ozempic and Wegovy) and by tirzepatide (sold as Mounjaro and Zepbound). The Bridge covers only certain products and forms from this group.
July 1, 2026 marks the Bridge’s start; December 31, 2027 marks its end. Bridge approval and payments to pharmacies use a process apart from your usual Part D drug plan.
Ask the prescriber how to request Bridge approval and ask the pharmacy whether it can process that request separately from your usual drug coverage.
People aged 18 or older meet the age rule; older adults are not excluded just because of age. Your weight for your height and health conditions must also meet the program’s rules.
For example, if you have type 2 diabetes, your treatment uses ordinary Part D because you are excluded from the Bridge. A Part D payment made earlier in 2026 toward your GLP-1 medicine also excludes you from the Bridge in 2026.
Ordinary Part D coverage still depends on your plan’s rules and approval of the prescription.
Your payments for medicines covered by Part D face an annual limit, also called a spending cap. The Bridge’s $50 monthly payment does not count toward that limit. Reaching the Part D limit does not remove the Bridge payment. Coupons cannot reduce a Bridge bill.
Ask the prescriber to check your weight and health history against the Bridge rules. Then ask the plan which payment route fits the proposed care.
Read Medicare’s Bridge explanation