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A step-by-step guide to getting prior authorization approved for Wegovy or Zepbound — what your insurer needs, typical timelines, and what to do if denied.
Getting prior authorization for Wegovy or Zepbound is one of the most frustrating parts of the GLP-1 journey. Your doctor has recommended it. You've looked up the research. And now you're stuck waiting on an insurance bureaucracy to decide whether you qualify. This guide walks through exactly what insurers want, how the process works, and what to do if they say no.
For the broader picture on whether your plan covers GLP-1s at all, see our GLP-1 insurance coverage guide. This article focuses on the prior auth process specifically — once you know your plan may cover it, here's how to move forward.
Prior authorization (sometimes called PA, pre-authorization, or pre-approval) is a requirement that your insurer approve a medication before your pharmacy will fill it at the covered price. The insurer reviews your medical history and confirms you meet their coverage criteria — only then does the medication become billable to your benefits.
It exists because insurers want evidence that a treatment is medically necessary for your specific situation, not just that it's FDA-approved in general. For GLP-1 medications, which can cost well over $1,000 per month at retail pharmacy prices without coverage (wegovy.com), insurers almost universally require it.
Both Wegovy (semaglutide) and Zepbound (tirzepatide) are branded, high-cost medications. Insurers use prior authorization to control utilization — and for GLP-1s specifically, to verify that the patient meets clinical thresholds before approving coverage.
The FDA approved Wegovy for adults with a BMI of 30 or higher, or a BMI of 27 or higher with at least one weight-related condition such as high blood pressure, type 2 diabetes, or high cholesterol (DailyMed, Wegovy prescribing information). Zepbound received similar indications (DailyMed, Zepbound prescribing information). Insurers generally mirror these FDA criteria — but many add their own requirements on top.
Even plans that technically cover GLP-1s for weight management may require PA on every refill, not just the initial fill. Some also require step therapy, meaning you may need to show you tried a different treatment first.
Every plan is different, but most prior authorization requests for Wegovy or Zepbound require some combination of the following:
Clinical documentation your prescriber will gather:
Plan-specific requirements that vary:
The best source for your plan's exact criteria is the drug's coverage policy document, which your insurer must provide on request. Search your insurer's website for "prior authorization criteria" plus the drug name, or ask your prescriber's office — they often have the list on file.
1. Confirm your plan actually covers the drug. Call the member services number on the back of your insurance card and ask: "Does my plan cover Wegovy or Zepbound for weight management, and is prior authorization required?" Get the answer in writing if you can — ask them to send a summary to your member portal. You can also check your plan's formulary online. Our article does insurance cover Wegovy or Zepbound? walks through how to read a formulary.
2. Talk to your prescriber before they submit anything. Your prescriber's office initiates the PA request — but the strength of that request depends on what documentation they include. Ask your provider: "Can you document my BMI, the comorbidities I have, and any prior weight management attempts in your notes?" A thorough clinical note dramatically improves approval odds.
3. Your prescriber submits the request. The PA form goes from your provider's office (or the telehealth platform's care team) directly to your insurer or pharmacy benefit manager. You generally don't submit this yourself. At this stage, the request enters a review queue.
4. The insurer reviews and decides. The insurer's medical reviewers evaluate whether your documented history meets their criteria. They may approve it, deny it, or request additional information (peer-to-peer review, where the reviewing doctor speaks directly with your prescriber).
5. You receive a determination. Approvals typically come with an authorization number valid for 6–12 months. If denied, you receive a denial letter — this triggers your appeal rights, covered below.
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Take the free quiz →Prior authorization for GLP-1 medications typically takes between one and three weeks from submission to decision, though this varies by insurer and plan type.
PlushCare, which handles prior auth on behalf of its patients, notes that the process typically takes 7–14 business days, though decision times vary by insurer (PlushCare, April 2026). Ro's insurance concierge team estimates a similar window of 1–3 weeks to coordinate coverage (Ro, April 2026).
Urgent prior authorization requests — for situations where a delay would seriously harm the patient — are required to be processed faster under federal rules, but routine weight management cases rarely qualify as urgent.
A few things can extend the timeline:
If you haven't heard anything after two weeks, call your insurer directly, ask for the status by the reference number your provider gave you, and follow up with your prescriber's office to confirm they've responded to any outstanding requests.
A denial is not the end. Most people don't realize they have multiple layers of recourse.
Step 1: Read the denial letter carefully. The letter must specify the reason for denial — this is the foundation of your appeal. Common reasons include: not meeting BMI criteria, insufficient documentation of comorbidities, missing prior treatment history, or the drug not being on the plan's formulary.
Step 2: File an internal appeal. Under the Affordable Care Act, most private insurance plans are required to offer an internal appeal process (Healthcare.gov). Your insurer must review it and issue a decision. Timelines vary by state and plan type, but you generally have 180 days from the denial to file. Submit a written appeal with a letter of medical necessity from your prescriber — this is a detailed clinical argument for why the medication is appropriate for your specific case.
Step 3: Request a peer-to-peer review. Your prescriber can call the insurer's medical reviewer directly and make the clinical case. This step alone reverses many denials. Ask your provider's office if they're willing to do this — many telehealth platforms will arrange it on your behalf.
Step 4: File an external appeal. If the internal appeal is denied, you have the right to an independent external review in most states. An external reviewer (not employed by your insurer) evaluates whether the denial was appropriate. External appeals are especially useful when the insurer's decision contradicts established clinical guidelines.
Step 5: Explore alternatives while you wait. If you need medication now and the appeal process is stretching on, see our guide on GLP-1 options without insurance — compounded GLP-1 options through cash-pay telehealth platforms can bridge the gap, though it's worth noting that compounded semaglutide and tirzepatide are not FDA-approved as finished products and differ from Wegovy and Zepbound.
One of the most practical ways to improve your odds is to use a telehealth platform whose care team manages the prior auth process end to end. These providers have staff experienced in submitting PA requests, responding to insurer requests for information, and advocating through appeals.
Ro has a dedicated insurance concierge team that verifies your benefits, submits the PA request, and communicates with your insurer directly. The service is available for commercial insurance plans. Learn more about Ro.
Ro
Insurance or cash-pay
Insurance concierge team handles PA submission and insurer back-and-forth for you.
PlushCare is built around an insurance-first model. Board-certified physicians document your case specifically for PA submission, and the care team manages the authorization process through approval. PlushCare accepts most major insurance plans. Learn more about PlushCare.
PlushCare
Insurance-based pricing
In-network with most major insurers — care team submits and tracks your prior auth.
Found offers a free insurance check before you commit, and their team manages the PA process for patients using insurance. Found covers an unusually broad range of medications, which also gives them flexibility to request alternative drugs if a first choice is denied. Learn more about Found.
Mochi Health integrates with major insurance plans and includes prior auth support as part of its clinical program. Learn more about Mochi Health.
Pros
Cons
Get your BMI documented before anything else. The most common reason for denial is insufficient clinical documentation — not a hard ineligibility. If your prescriber's visit note doesn't explicitly state your BMI and link it to the clinical indication, the reviewer may deny it on a technicality. Make sure the note is specific.
List every qualifying comorbidity. If your BMI is 28 and you have hypertension, that comorbidity is your approval pathway. Make sure it's in the clinical note, with the specific diagnosis code. Don't assume the insurer will look it up — reviewers work from what's in the PA submission.
Document prior weight management efforts. Many plans require evidence you've tried other approaches. Even informal efforts count: a documented conversation with your doctor about diet and exercise, a referral to a dietitian, or enrollment in a structured program. The more you can show, the better.
Ask for a letter of medical necessity upfront. Don't wait for a denial. Ask your prescriber to write a detailed letter of medical necessity when submitting the initial request. A generic PA form alone often gets denied; a letter that explains your clinical history and why this medication is specifically indicated for you is significantly stronger.
Know which drug your plan prefers. Some plans cover Zepbound but not Wegovy, or vice versa. If you're flexible on which GLP-1 you receive, ask your prescriber to check formulary preference before submitting — requesting the preferred drug from the start avoids a denial and re-submission.
Follow up proactively. PA requests can sit in queues for days with no movement. Calling your insurer every 3–4 business days to check status keeps your request from being forgotten, and sometimes surfaces outstanding information requests before they expire.
Prior authorization is a process, not a verdict. Patients who pursue appeals — particularly with a strong letter of medical necessity and a peer-to-peer review — have meaningful recourse even after an initial denial. If insurance isn't working for you at all, our GLP-1 without insurance guide covers cash-pay and compounded alternatives.
GLP-1 medications require a prescription. This article is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider to discuss whether Wegovy, Zepbound, or any GLP-1 medication is appropriate for your situation.