How Long Does Prior Authorization Take? Timelines by Payer and How to Speed Them Up

Your patient needs an MRI, a specialty drug or a procedure. Before anything happens, the insurer has to say yes. Then the waiting starts, and so do the phone calls from the patient asking why nothing has been scheduled.

Prior authorization is now one of the biggest time sinks in a practice. In the American Medical Association's December 2024 survey of 1,000 physicians, the average physician handled 39 prior authorizations a week, and physicians and their staff spent about 13 hours a week on them. 93% said prior authorization delays patient care, and 82% said it sometimes leads patients to abandon treatment.

So how long does prior authorization actually take? It depends on the payer, the type of request and how complete your submission is. Here are the rules each payer type has to follow, why requests still stall, and seven ways to get approvals back faster.

The short answer

• Urgent (expedited) requests: usually 72 hours or less. Medicare Part D drug requests have 24 hours.

• Standard requests: 7 calendar days for Medicare Advantage and Medicaid plans as of January 1, 2026, and up to 15 days for many employer plans.

• Electronic requests: some are approved in real time, within minutes.

Those are the payer's clocks. In practice, the total wait also includes the time it takes your team to gather records, submit, answer follow-up questions and chase a decision. That part is the one you control.

Prior authorization timelines by payer

Medicare Advantage

Under the CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F), Medicare Advantage plans must decide urgent requests within 72 hours and standard requests within 7 calendar days, starting January 1, 2026. Before the rule, standard decisions could take up to 14 days.

Medicaid and CHIP

The same rule covers state Medicaid and CHIP fee-for-service programs and their managed care plans: 72 hours for urgent requests and 7 calendar days for standard ones, also from January 1, 2026. State law can set shorter limits.

Medicare Part D (prescription drugs)

Part D plans must make a coverage decision within 72 hours for a standard request and 24 hours for an expedited one. The clock usually starts when the plan receives the prescriber's supporting statement, so a missing statement means the clock hasn't started.

Employer and commercial plans

For most employer-sponsored plans, federal claims rules allow up to 72 hours for urgent requests and up to 15 days for standard pre-service requests, with one possible 15-day extension. Many states set shorter limits for fully insured plans, so check your top payers' contracts.

Traditional Medicare

Original Medicare requires prior authorization for only a short list of services, such as certain outpatient procedures and medical equipment. Most of your prior authorization volume will come from Medicare Advantage and commercial plans.

Why prior authorization takes longer than the rules say

1. Incomplete submissions

A request missing clinical notes, a diagnosis code or a prior treatment history gets pended. The payer asks for more information, and the clock often resets when you send it.

2. Fax and phone requests

Paper and phone requests wait in queues that electronic requests skip. They're also harder to track, so it's easy to lose a day finding out where one stands.

3. Nobody follows up

When prior authorization is everyone's side job, requests sit until the patient calls. A request that needed one extra document on day two can still be open on day ten.

4. Denials and peer-to-peer reviews

A denial adds an appeal or a peer-to-peer call with the payer's reviewer, which can add days or weeks. Many denials trace back to the same missing documentation as problem 1.

How to speed up prior authorization: 7 tactics

1. Check requirements when you schedule

Confirm whether a service needs prior authorization at the moment it's scheduled, not the day before the visit. Pairing this with insurance eligibility checks, often done by an insurance verification specialist, catches most surprises early.

2. Build a checklist for each top payer

List the documents each of your top five payers asks for by service: notes, imaging, labs, failed treatments. A complete first submission is the single biggest time saver.

3. Submit electronically whenever you can

Use payer portals and electronic prior authorization (ePA) tools instead of fax. Many electronic requests get faster decisions, and some are approved in real time.

4. Mark urgent requests correctly

If waiting could seriously harm the patient's health, ask for an expedited review and have the provider document why. That moves the payer clock from days to hours.

5. Follow up on a set schedule

Don't wait for the payer. Check status on day two and again before the deadline, and answer requests for more information the same day.

6. Track every request in one place

Keep a single log with the patient, service, payer, submission date, status and next follow-up date. It shows what's late at a glance and which payers slow you down most.

7. Give prior authorization one owner

The practices that move fastest have one person whose job is prior authorization. In the AMA's earlier 2023 survey, 35% of physicians already had staff working only on prior authorization. If you can't hire locally, prior authorization outsourcing gives you that owner without a long search.

How to speed up prior authorization for medication

Drug requests have their own fixes:

• Check the formulary first. If a covered alternative works for the patient, you may skip prior authorization entirely.

• Use ePA in your EHR. Most EHRs can send drug prior authorization requests electronically, which is usually faster than fax.

• Document step therapy. List the drugs the patient already tried, the dates and why they failed. Missing step therapy history is a common reason for pended requests.

• Ask for an expedited review when it's warranted. For Part D, that cuts the deadline from 72 hours to 24.

What's changing in 2026 and 2027

The rules are moving in practices' favor:

• Faster decisions (January 1, 2026): the 72-hour and 7-day limits for Medicare Advantage and Medicaid plans took effect.

• Public metrics (from March 31, 2026): these payers must post prior authorization data, like approval rates and average decision times, on their websites every year.

• Electronic prior authorization (January 1, 2027): payers must offer a Prior Authorization API that lets your EHR submit requests and get decisions directly.

• Insurer commitments: in June 2025, major health plans pledged to standardize electronic submissions and approve at least 80% of electronic requests in real time by 2027. In April 2026, AHIP and the Blue Cross Blue Shield Association said plans had cut 11% of prior authorization requirements.

The workload isn't gone yet, though. The American Hospital Association reported in September 2025 that 95% of hospitals saw staff time on prior authorization go up over the previous year. Faster payer rules only help if someone in your practice submits clean requests and follows up.

How Outsentia Health handles this: Outsentia Health places certified remote healthcare staff who work as part of your team, inside your systems, on your schedule. A dedicated remote prior authorization specialist owns every request from submission to decision, which is especially useful for high-volume specialties like cardiology practices.

Frequently asked questions

How long does prior authorization take for medication?

For Medicare Part D, plans have 72 hours for a standard request and 24 hours for an expedited one. Commercial plans vary, but electronic requests through your EHR are usually the fastest route.

How long does prior authorization take for an MRI or other imaging?

Medicare Advantage and Medicaid plans have 7 calendar days for a standard request, or 72 hours if it's urgent. Many commercial plans use outside imaging review companies, and a complete submission is often decided within a few business days.

Can I ask for a faster decision?

Yes. If waiting could seriously harm the patient's health, the provider can request an expedited review. The provider should document why the request is urgent.

Who should handle prior authorizations in a small practice?

Ideally one trained person who owns every request from start to finish. When prior authorization is split across the front desk, requests fall through the cracks.

Sources

• AJMC, "AMA survey highlights growing burden of prior authorization" (Feb 24, 2025): December 2024 survey of 1,000 physicians, 39 prior authorizations and about 13 hours a week, 93% report care delays, 82% report treatment abandonment.

• AMA press release (June 18, 2024): 35% of physicians employ staff who work only on prior authorization.

• CMS fact sheet, Interoperability and Prior Authorization Final Rule (CMS-0057-F): 72-hour and 7-day decision limits from January 1, 2026, public metrics from March 31, 2026, and the Prior Authorization API from January 1, 2027.

• Becker's Payer Issues, "Insurers' prior authorization commitments, 1 year in" (July 20, 2026): the June 2025 insurer pledge, the 11% cut in requirements, and the AHA's 95% finding.