A GLP-1 prior authorization is a form your prescriber submits showing you meet the plan’s written coverage criteria. It typically requires your measured BMI, a qualifying weight-related condition, documentation of previous weight loss attempts, and a statement of medical necessity. Missing documentation — not ineligibility — is the most common reason requests are pended or denied.
This is one part of getting a GLP-1 covered. For the full picture, see GLP-1 Insurance Coverage: The Complete Guide.
What a prior authorization actually is
It is a cost-control step. Before the plan pays for a drug on its PA list, it wants a prescriber to demonstrate the prescription meets pre-written criteria. Those criteria exist as a document — your plan’s clinical policy bulletin or coverage determination — and it is usually available publicly on the insurer’s website.
Find it and read it. This is the single most useful thing you can do, because it tells you exactly what the reviewer is checking. Search your insurer’s name plus “clinical policy” plus the drug name.
The four elements almost every request needs
Measured anthropometrics. Height, weight, and calculated BMI, recorded at a clinical visit. Self-reported weight from a phone call is weaker. Some plans want a baseline from a specific window, such as within the past six months.
Diagnosis codes. Obesity or overweight coded correctly, plus the qualifying comorbidity if your BMI falls in the 27–29.9 range. A condition your doctor knows you have but has never coded does not exist as far as the reviewer is concerned.
Prior weight management attempts. Usually a structured program with diet and physical activity, documented over a defined period. The plan may specify a duration and a recency window.
A statement of medical necessity. A short clinical narrative from the prescriber explaining why this drug, for this patient, now. Generic statements get pended. Specific ones referencing your comorbidities and failed attempts do better.
Some plans add more: attestation that you have been counseled on diet and exercise, confirmation that you are not pregnant, or a requirement that the prescription come from or be co-signed by a specialist.
Where requests actually fail
In practice, the failure points are mundane and fixable.
The weight loss attempt documentation is absent or too vague. “Patient has tried dieting” is not documentation. Dates, program names, and outcomes are.
The BMI is borderline and unmeasured. A BMI of 27.1 based on a self-reported weight invites scrutiny in a way that 34.2 measured in clinic does not.
The comorbidity is mentioned in the notes but not coded. Reviewers work from codes.
The form is incomplete and gets pended, then nobody in the practice follows up, and it quietly expires. This is more common than outright denial.
What you can do to help it succeed
Assemble the evidence yourself and hand it over. You know your own history better than your chart does.
Write a one-page weight history: starting weight, peak weight, current weight, with dates. List every structured attempt with what it was, when, how long, and what happened. Note any medications you have taken that cause weight gain. List your diagnoses.
Then ask the practice two questions: whether they submit electronically, and who to contact if the request is pended. Get a name. Call that person after a week if you have heard nothing — a large share of stalled requests move the moment somebody chases them. How Long Does GLP-1 Prior Authorization Take
If it comes back requiring you to try something cheaper first, that is step therapy and there is a formal exception process. If it is denied outright, go to the appeal. What Is Step Therapy and How to Get an Exception Wegovy Denied by Insurance? Use This Appeal Letter Template
Renewals are their own hurdle
Approval is time-limited. When it expires you need a fresh request, usually demonstrating the drug has worked — often a threshold like 5% weight loss from baseline. Plan for this from day one by making sure your weights are recorded at every visit. Continuation Criteria: Proving the Drug Is Working What to Do When Your GLP-1 Prior Auth Expires
Frequently asked questions
Can I submit a prior authorization myself?
No. It has to come from the prescriber. You can supply the supporting documentation, and doing so meaningfully improves the outcome.
What does “pended” mean?
The reviewer needs additional information before deciding. It is not a denial. It usually resolves quickly once the missing item is supplied — but only if someone in the practice notices and responds.
Does my plan have to tell me why it denied me?
Yes. You are entitled to a written explanation and to the criteria used. Request the clinical policy document if you have not seen it.
Can a telehealth provider file a prior authorization?
Many can, but capability varies a great deal between services. Ask before you sign up — some explicitly do not handle insurance at all. How to Evaluate a Telehealth GLP-1 Provider
Will a different drug be easier to approve?
Sometimes. If your plan’s criteria for one GLP-1 are stricter than another, that is worth knowing before you request. Zepbound vs. Wegovy: Full Comparison
Does starting at a lower dose help approval?
No. Approval is based on criteria, not dose. Dosing is a clinical decision. Wegovy Dosing Schedule: Complete Titration Chart
Sources
- FDA Prescribing Information, Wegovy and Zepbound — accessdata.fda.gov
- Department of Labor, ERISA claims procedure regulation, 29 CFR 2560.503-1 — dol.gov
- Centers for Medicare & Medicaid Services, coverage determination process — cms.gov
The two places these requests fail most often are the weight history and the coding, both covered in how to document failed attempts properly. If the request comes back demanding you try something cheaper first, that is step therapy, and it has its own exception process.