Few things in GLP-1 treatment produce more frustration than the moment a prescription exists, a pharmacy has stock, and the plan says not yet. Prior authorization is a process most people meet without warning, learn about in fragments, and then have to navigate again a few months later when the approval quietly expires.
This article explains what the process involves, what plans commonly ask for, and the narrow but genuine role your own records play. It does not promise an outcome, because nobody honestly can.
What a prior authorization actually is
A prior authorization is a requirement that the insurance plan approve a medication before agreeing to cover it. It is a coverage decision, not a clinical one: your prescriber has already decided the medication is appropriate, and the plan is deciding whether it will pay.
The request is submitted by the prescriber's office, on the plan's forms, using documentation from your chart. This is worth stating plainly because a lot of people arrive at this process believing it is their paperwork to complete. It is not. Your job is narrower and more valuable: making sure the history the office is working from is accurate and complete, so that what gets submitted reflects what actually happened.
Turnaround varies widely by plan and by how the request is submitted. So do outcomes. Two people with similar histories and different employers can get different answers, which is a feature of how coverage works rather than an error anyone made.
The criteria plans commonly list
Criteria differ from plan to plan, and the only authoritative version is your own plan's policy document. That said, some requirements appear often enough to be worth knowing about before you meet them.
- Body mass index thresholds. A BMI of 30 or above is a common threshold, or 27 or above when paired with a weight-related condition such as hypertension, high cholesterol, sleep apnea or prediabetes.
- Documentation of lifestyle efforts. Many plans want evidence of dietary changes, physical activity, or participation in a structured program, sometimes over a defined period.
- Step therapy. Some plans require that a preferred or less expensive medication be tried first, and that its outcome be documented, before covering the one that was prescribed.
Reading that list, the pattern becomes clear: nearly every criterion is a request for documented history. That is the thread running through this whole topic, and it is where a person who has been keeping records has a real advantage over a person reconstructing three years from memory.
What the office is usually asked to supply
The documentation commonly requested for a GLP-1 prior authorization includes the insurer's own forms, frequently a letter of medical necessity written by the prescriber, chart notes covering BMI and weight history, relevant labs such as A1c and cholesterol, records of participation in lifestyle or medically supervised programs, and a medication history with outcomes.
Every item on that list is assembled by the clinic from the clinical record. None of it is something you file. But two of them, weight history and medication history with outcomes, are the parts most likely to be thin in a chart, simply because charts only contain what got recorded during visits. A weight measured every three months in an office is a coarse record of a year. A medication history that says "patient reports taking as directed" is thinner still.
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Re-authorization: the part that surprises people
Coverage that starts is not coverage that continues, and this is where the process catches most people off guard.
Approvals are often time-limited, commonly for 6 to 12 months. Renewal frequently requires documented weight loss on the medication, meaning the plan wants to see that the treatment is working before it agrees to keep paying for it. Someone whose approval runs out in month nine may discover it at a pharmacy counter, with a refill they cannot collect and no time to assemble anything.
The practical response is unglamorous. Find out the end date of your current approval. Note it somewhere you will see it. Raise renewal with the prescriber's office a few weeks before, not on the day. And make sure that during those months the weight record exists in a form the clinic can actually use, because "I have definitely lost weight" is not documentation and a plan will not treat it as such.
This is also a reason to keep tracking through periods when tracking feels pointless. A stretch where the scale barely moves still produces a record, and a record with a gap in the middle is harder to submit than one that runs continuously.
If the answer is no
Denials happen, including on requests that look straightforward. Reported figures on what happens next are striking: an analysis found that fewer than 1 percent of denials are appealed, and that of those appealed, insurers reversed roughly a third on internal review alone.
Hold both halves of that carefully. Those are reported numbers about denials generally, not a prediction about any particular case, and a reversal rate on appealed cases is not a promise about yours. What the figures do suggest is that the appeal step is very often skipped entirely, and that skipping it forecloses an option that is sometimes available.
Appeals are described as strongest when they are a joint effort: the patient files within the plan's stated deadlines, and the prescriber supplies clinical documentation and requests a peer-to-peer review, in which the prescriber discusses the case directly with a reviewing clinician at the plan. Both halves matter, and the clinical half is the one only your prescriber can provide.
Beyond that, we are not going to advise you on how to handle an insurance dispute. That is legal and insurance territory, plan-specific, and outside what a tracking app's website can responsibly offer. Your plan documents set out your appeal rights and deadlines, and your prescriber's office has usually done this before.
Where a tracking app honestly fits
Here is the whole of it, stated narrowly on purpose.
A dose log is an adherence record with dates. It shows a medication, an amount, and the actual day each dose was taken, across months, without depending on anyone's memory. A weight history logged over the same period is a far denser record than quarterly office measurements. On Premium, both can be exported as CSV or JSON and handed to the prescriber's office, which can use them alongside the clinical record when assembling a submission. Our guide to bringing data to an appointment covers how to hand something over in a way that actually gets used.
If your weight already flows into Apple Health from a smart scale, the app can read it, which means the history builds itself. Our article on GLP-1 tracking and Apple Health explains what that import covers and how permissions work.
Now the limits, which matter more than the capability. The app submits nothing. It does not communicate with insurers, it has no connection to any plan or pharmacy system, and it has no idea what your policy says. It cannot influence a decision and it guarantees nothing. It supports what your clinician submits, and that is the entire claim. Everything it holds stays on your phone unless you export it deliberately, which is how we think health data should work in general, as we argued in why your GLP-1 data should stay on your phone.
The takeaway
Prior authorization is a coverage process run between your prescriber's office and your plan, built almost entirely on documented history. Criteria commonly involve BMI thresholds, weight-related conditions, evidence of lifestyle efforts, and sometimes step therapy. Approvals are frequently time-limited and renewals often depend on documented progress. Denials can be appealed, and reported figures suggest most people never do.
None of this is under your control, and pretending otherwise would be unkind. What is under your control is the quality of the history behind the request: real dates, a continuous weight record, and an accurate account of what you have taken and how it went. Plans differ, nothing here guarantees coverage, and a good record is still worth having for a dozen reasons that have nothing to do with insurance. For the rest of what a tracker should do, see our take on what actually matters in a GLP-1 tracker.
Frequently asked questions
What is a prior authorization for a GLP-1?
It is a requirement that the insurance plan approve the medication before it will cover it. The prescriber's office submits the request using the plan's own forms and supporting documentation from your chart. You are not the one filing it. Your part is making sure the history the office is working from is accurate and complete, which is a smaller job than it sounds and a more useful one than it sounds.
What criteria do insurers commonly use for GLP-1 coverage?
Commonly listed criteria include a BMI of 30 or above, or 27 or above alongside a weight-related condition such as hypertension, high cholesterol, sleep apnea or prediabetes. Plans often ask for documentation of lifestyle efforts, and some apply step therapy, meaning a preferred or less expensive medication must be tried first. Plans differ significantly, and no set of criteria described here guarantees coverage under yours.
What documents does a GLP-1 prior authorization usually need?
Typically the insurer's own forms, often a letter of medical necessity, chart notes covering BMI and weight history, relevant labs such as A1c and cholesterol, records of participation in lifestyle or medically supervised programs, and a medication history with outcomes. All of it is assembled and submitted by the prescriber's office from the clinical record, not by you.
Why did my GLP-1 coverage stop after it was approved?
Approvals are often time-limited, commonly for 6 to 12 months, and renewal frequently requires documented weight loss on the medication. Coverage that starts is not coverage that continues. Knowing your approval's end date and asking the office about renewal a few weeks ahead is the practical response, because a lapse discovered at the pharmacy counter is much harder to fix than one anticipated.
Is it worth appealing a denied GLP-1 prior authorization?
An analysis found that fewer than 1 percent of denials are appealed, and that of those appealed, insurers reversed roughly a third on internal review alone. Those are reported figures about denials generally rather than a prediction about any specific case. Appeals tend to be strongest when the patient files and the prescriber supplies clinical documentation and requests a peer-to-peer review. Nothing here is legal or insurance advice.