GLP-1 prior authorization: how to prepare and avoid delays

Call your insurance plan or check your plan portal and ask if the drug needs prior authorization (PA), step therapy, or a quantity limit. Ask which exact product and form is covered (for example, Wegovy injection vs Wegovy pill, or Zepbound KwikPen vs another form). Request the PA criteria document or a link to it so you can read the requirements yourself. If you have Medicare Part D and you are using the temporary Medicare GLP-1 Bridge (July 1, 2026 through Dec 31, 2027), confirm that your plan is processing it under that demonstration and what documentation they want.

Most PAs for weight management focus on age, current BMI, and whether you have certain related conditions. Ask your prescribing clinic what they need from you, then collect recent weight/height, a dated BMI calculation, and a recent problem list or visit summary that documents relevant diagnoses. For the Medicare GLP-1 Bridge, eligibility generally includes age 18+ and BMI thresholds (BMI 35+, or 30+ with certain heart, kidney, or blood-pressure conditions, or 27+ with prediabetes, prior stroke/heart attack, or symptomatic PAD), plus plan prior authorization. Do not guess or “round” numbers—use the most recent measured values in your medical record.

Ask the clinic whether they submit PAs through an electronic portal, by fax, or by phone, and what their turnaround time is. Provide a one-page note you can message to the clinic with: the exact drug name, dose form (pen, vial, or pill), your pharmacy, and the plan’s PA phone/fax if available. If you are switching products because of supply, tolerability, or coverage changes, ask the clinic to document the reason in the chart so it can be used in the PA narrative. Avoid adding drug interaction questions to the PA request—send those to your pharmacist or prescriber separately so the PA does not stall.

Many plans require a new PA after a set time, even if the medication is working for you. Put a reminder on your calendar to start checking PA status 3–4 weeks before you run out, since pharmacies may not be able to fill until the authorization is active. If your plan asks for “continuation of therapy” documentation, your clinic may need updated weight, BMI, and a brief progress note. Never change how you take your medication to stretch doses without your prescriber’s direction—focus on getting the paperwork moving early.

Write down the date, time, and reference number for every insurer call, plus the name of the person you spoke with. Ask two specific questions each time: “What is the current status?” and “What exact item is missing?” If the plan says they did not receive the PA, ask whether they accept resubmission electronically and confirm the correct fax number if fax is used. If you get a denial, request the denial letter and the reason code so your prescribing clinic can decide whether an appeal or a new submission makes sense.

If you are stuck in PA delays, ask your pharmacist and prescriber what legitimate options exist for your situation, such as checking coverage for a different covered form (for example, Wegovy pill vs injection, or Zepbound KwikPen vs other options) or using the manufacturer’s channel if you are paying cash. At the time of writing, some people price-check through TrumpRx.gov, which routes to the manufacturer’s program (it is not insurance), and prices and eligibility can change often—confirm details directly with the manufacturer, your plan, or your pharmacist. If you see “retatrutide” for sale online, know that it is not FDA approved as of this date and is not legally prescribable outside clinical trials. If you use compounded products, treat them as a separate conversation with your prescriber and pharmacist, because insurance rules and documentation needs may differ.