Ozempic, Wegovy and Medicare: What Is Covered and What Is Not

The exclusion is about purpose, not product

Part D is prohibited by law from covering drugs used for weight loss or appetite suppression. That exclusion is old, written when the drugs in question were far less effective, and it has not been repealed. Part D also cannot cover drugs excluded under Part B, or barbiturates outside certain conditions.

The consequence is a distinction that feels arbitrary to patients. Semaglutide prescribed for type 2 diabetes is a covered drug. Semaglutide prescribed for obesity alone is an excluded one, even though the injection is identical.

When the same drug becomes coverable

Coverage turns on whether the plan's formulary lists the drug for a medically accepted indication other than weight loss. A drug carrying an approved cardiovascular risk reduction indication, or one used for sleep apnea in a specific population, sits in a different category than a drug approved only for weight management.

The plan still decides. Even where the indication exists, Part D sponsors apply prior authorization, step therapy, and quantity limits, and a formulary can change every January. Two people on the same plan can have different answers because their diagnoses differ.

What Original Medicare and supplements do here

Part A and Part B do not cover outpatient prescription drugs at all, so a Medigap policy is irrelevant to this question. It pays cost sharing on covered medical services, and a prescription is not one of them.

Intensive behavioral therapy for obesity is covered when delivered in a primary care setting, and bariatric surgery is covered when medically necessary and criteria are met. Both are surgical or behavioral routes rather than pharmacological ones, and both remain available when a drug is not.

Questions to ask before assuming an answer

Ask the plan three things: is this specific drug on the formulary, what indication is required, and what prior authorization criteria apply. Ask the prescriber to document the diagnosis that supports coverage rather than the goal. And ask whether the manufacturer's patient assistance program could apply, since income-qualified assistance has become a common workaround where a plan will not pay.