How to read a guide
A coverage guide is a question list, not an answer. Medicare does not decide once, nationally, whether a GLP-1 medicine is covered for you. The answer comes out of four things: the medicine, the reason your prescriber wrote it, the rules of your particular drug plan, and whether the pharmacy can fill it today. A guide names those four things so you can ask about them in order.
- Find the guide for your medicine, or the general guide if yours is not listed.
- Note the reason your prescriber gave. The reason, not the brand name, is what your plan reads.
- Write down the questions in the guide that apply to you, and leave space for the answers.
- Call your plan first, using the number on your plan card rather than a number from a search result.
- Call the free counselor for your state if a plan answer does not make sense. They do not sell plans.
What to have in front of you
These calls go faster when you are not hunting for numbers. Have your Medicare card, your plan card, a list of the medicines you take, and the name of the medicine and dose being asked about. If a prior authorization has already started, have the plan letter with it, because the letter carries the request number and the date the plan answered.
If English is not your first language, ask the plan for an interpreter when you call. If you use a hearing device or need large print, ask the plan to send its decision in the format you can read. These are plan obligations, not favors, and asking for them early avoids a second call.
What changes, and what does not
Medicare’s drug plan rules are national. What a plan may require before it approves a drug does not change because of your state. What changes is which plans are sold where you live, what each plan puts on its drug list, what it charges for a tier, and which pharmacies are in its network.
Two people living on the same street with different plans can get different answers about the same medicine, and both answers can be correct. That is why a guide cannot tell you whether you are covered, and why this site never says a medicine is covered.
Who can answer which question
Part of what makes these calls frustrating is asking the wrong party. Each of the four people you can reach holds a different piece of the answer, and none of them holds all of it.
- Your prescriber answers what the medicine was prescribed for, and can send the documentation a plan asks for. The diagnosis is theirs to state, and it is usually what a plan reads.
- Your drug plan answers whether the medicine is on its list, what tier it sits in, what it requires before approving it, and what your share is. Use the number on your plan card.
- Your pharmacy answers whether it can fill the prescription, whether it is in your plan’s network, and whether the dose is on hand. It cannot answer whether the plan will approve it.
- Your state’s free Medicare counselor answers what the paperwork means. They read plan documents with you, and they do not sell plans.
If two of them disagree, the written plan document is what settles it, which is why the next section starts with asking for the decision in writing.
If the plan says no
A denial is a decision with a reason attached, and it is not the end of the process. Ask the plan to send the decision in writing, ask what the reason was, and ask for the deadline to challenge it. Then ask your prescriber whether the documentation they sent matches the reason the plan gave, because a denial often turns on which diagnosis was submitted rather than on the medicine itself.
Keep everything: plan letters, authorization forms, pharmacy messages, and notes from the prescriber’s office. A free Medicare counselor can read those documents with you and explain what the plan is asking for before you call back.
Where the coverage rules come from
These are the pages the guides are written from. They are public, and you can read them without an account.
Medicare: drug plan rules
The plan rules a Part D drug plan may apply, including prior authorization and step therapy.
Medicare: appeals for drug plans
What to do when a drug plan says no, and the steps that follow.
CMS: Medicare GLP-1 Bridge
The program page for the Bridge, including information written for beneficiaries and for providers.
FDA: Wegovy cardiovascular-risk approval
The approval notice behind the heart-disease indication.
FDA: Zepbound approvals
The chronic weight management approval; the sleep apnea approval is linked from that guide.