Your doctor’s office handles most of the prior authorization process, but understanding each step helps you avoid delays and push things forward when they stall. A standard prior authorization decision can take up to 7 calendar days for non-urgent requests, though urgent requests must be resolved within 72 hours. Knowing what’s happening behind the scenes, and where you can step in, makes a real difference in how quickly you get your medication.
What Triggers a Prior Authorization
A prior authorization is your insurance company’s way of deciding whether it will cover a specific medication before you fill it. You’ll typically find out one is needed when your pharmacy runs the prescription and gets a rejection message, or when your doctor’s office flags it in advance. Insurers require prior authorizations for medications that are expensive, have cheaper alternatives, carry safety risks at certain doses, or fall outside the plan’s preferred drug list (formulary).
Sometimes what looks like a prior authorization is actually “step therapy,” a related requirement where your insurer wants you to try a less expensive medication first. If that drug doesn’t work or causes side effects, your doctor can then request the originally prescribed medication. You or your doctor can also request an exception to skip step therapy if there’s a clinical reason you need direct access to the prescribed drug. Those exception requests are generally resolved within 72 hours.
How the Process Works, Step by Step
Your doctor’s office is responsible for submitting the prior authorization request to your insurance company. Here’s the typical sequence:
- Prescription triggers a PA flag. Either the pharmacy or your doctor’s office identifies that the medication requires prior authorization.
- Your doctor’s office gathers documentation. They compile the clinical evidence your insurer needs, including your diagnosis, relevant lab results, imaging, chart notes, and a record of any medications you’ve already tried.
- The request is submitted. Your doctor’s office sends the prior authorization form and supporting documents to your insurer, usually by fax, phone, or an electronic portal.
- Your insurer reviews the request. They may approve it, deny it, or ask for additional information.
- Both you and your doctor receive a written decision. If approved, you can fill the prescription. If denied, the letter will explain why and outline your appeal options.
The specific information your insurer needs includes your insurance ID number, the prescriber’s license and identification numbers, the exact drug name, strength, formulation, quantity, dosing directions, and your diagnosis with the corresponding medical code. Beyond those basics, the insurer expects clinical documentation proving the medication is medically necessary for you specifically. Chart notes, lab results, and diagnostic imaging are all common supporting evidence. Everything submitted must be verifiable in your medical record.
How Long It Takes
As of January 2026, federal rules require Medicare Advantage, Medicaid, CHIP, and Marketplace plans to respond to standard prior authorization requests within 7 calendar days and urgent requests within 72 hours. Before these rules took effect, some decisions dragged on for up to 30 days.
If your doctor believes waiting could harm your health, they can submit an expedited (urgent) request, which compresses the timeline significantly. Whether a request qualifies as urgent depends on your clinical situation, not on convenience, so your doctor needs to document why the delay poses a medical risk.
Getting Medication While You Wait
If your medication is denied at the pharmacy because a prior authorization is pending, many insurance plans allow pharmacies to dispense a 72-hour emergency supply while the decision is being made. This is especially important for medications you can’t safely stop taking, like seizure drugs, blood thinners, or psychiatric medications. Ask your pharmacist directly whether an emergency supply is available under your plan. Not every state or insurer mandates this, but it’s a common provision.
What You Can Do to Speed Things Up
Even though your doctor’s office drives the process, you’re not powerless. A few practical steps can shave days off the timeline.
First, call your doctor’s office within a day or two of learning a PA is needed and confirm they’ve submitted the request. Prior authorizations sometimes sit in a queue, especially at busy practices. A polite follow-up call can move yours to the top of the pile. Ask the staff member handling it for a reference number or confirmation that it’s been sent.
Second, check your insurer’s member portal. Some plans now offer online tracking tools that let you monitor the status of a prior authorization in real time. If your pharmacy benefits are managed by a company like Prime Therapeutics, for example, you can sign in to their member site and see whether there’s an open coverage request, along with any decision letters. Even if your plan doesn’t have a dedicated tracker, calling the number on the back of your insurance card and asking about the status works.
Third, make sure your doctor’s office has everything it needs from you. If you tried and failed a similar medication with a previous doctor, those records may not be in your current chart. Providing that history proactively gives your doctor stronger documentation to submit.
What to Do if Your Request Is Denied
A denial isn’t the end of the road. There are two levels of appeal available to you: an internal appeal and an external review.
An internal appeal asks your insurance company to reconsider its own decision. Your doctor can submit additional clinical evidence that wasn’t included in the original request, or make a stronger case for why the medication is necessary. Many denials are overturned at this stage, particularly when the initial submission was missing documentation. Pay attention to the deadline listed in your denial letter, as you typically have a limited window (often 30 to 60 days) to file.
If the internal appeal fails, you have the right to request an external review. This sends your case to an Independent Review Organization, a neutral third party that is not affiliated with your insurance company. The IRO evaluates the medical evidence independently and makes a binding decision. That means if they rule in your favor, your insurer must cover the medication. If they rule against you, that decision is also final.
Your denial letter will include instructions for both levels of appeal. Your doctor’s office can help with the clinical side, but you’re the one who needs to initiate the process and stay on top of deadlines.
Common Reasons for Denials
Understanding why prior authorizations get denied helps you avoid the most fixable problems. The most frequent reasons include incomplete documentation (missing lab results, no record of previous medications tried), requesting a brand-name drug when a generic equivalent exists on the formulary, not meeting step therapy requirements, or a diagnosis that doesn’t match the insurer’s approved uses for that medication.
Some of these are straightforward to resolve. If the denial is based on missing information, your doctor simply resubmits with the missing pieces. If it’s a step therapy issue, your doctor can document why the preferred alternatives aren’t appropriate for you, whether due to side effects, drug interactions, or a prior failed trial. The key is reading the denial letter carefully. It will specify exactly what criteria weren’t met, which tells your doctor precisely what to address in the appeal.