How long does prior authorization take?

Standard requests typically return in 5 to 15 business days; expedited or urgent requests are usually decided within 72 hours. Electronic submission through a payer portal is consistently faster than fax.

Can I get a retroactive authorization?

Some payers allow it within a short window — often 24 to 72 hours after an urgent service — but most do not. Where retro authorization is unavailable, the route is an appeal citing medical necessity and the urgency of the presentation.

What is a peer-to-peer review?

A call between the treating provider and the payer's medical director to argue medical necessity before or after a denial. It is often the fastest way to overturn an authorization denial, and many payers only offer a narrow window to request it.

Why was a claim denied when I had an authorization?

Usually a mismatch: a different CPT code, more units than approved, a date of service outside the approved range, a different rendering provider or facility, or an authorization tied to the wrong plan.

What is gold-carding?

A payer program that exempts practices with consistently high approval rates from authorization requirements for specific services. Where offered, it is worth applying for — it removes work rather than speeding it up.

Prior Authorization

Prior Authorization: Requirements, Timelines and Appeals

The pre-service requirement that generates more denials than any coding error.

Prior authorization is the payer's permission slip, and in 2026 it is the single largest administrative burden in most practices. A study-worthy share of authorization denials are not clinical disagreements at all — they are process failures: the request went to the wrong plan, the code on the authorization did not match the code on the claim, or the authorization expired before the service was performed.

The mechanics matter more than the policy debate. Which services on your schedule require authorization by payer. Who submits the request and how they track it. What turnaround the plan is contractually obliged to meet, and what the escalation path is when it does not. Whether the authorization number, the CPT code, the units, and the date range on the approval match what the claim will actually carry.

CMS interoperability rules have pushed payers toward electronic prior authorization and shorter decision windows, and several large carriers have trimmed their authorization lists or introduced gold-carding for high-performing practices. Both changes help, but neither removes the need for a tracking system.

These pages cover payer-by-payer requirements, how to write a request that gets approved on first pass, peer-to-peer review, retroactive authorization, and the appeal route when a service was medically necessary but performed without an approval on file.

Frequently asked questions

How long does prior authorization take?: Standard requests typically return in 5 to 15 business days; expedited or urgent requests are usually decided within 72 hours. Electronic submission through a payer portal is consistently faster than fax.
Can I get a retroactive authorization?: Some payers allow it within a short window — often 24 to 72 hours after an urgent service — but most do not. Where retro authorization is unavailable, the route is an appeal citing medical necessity and the urgency of the presentation.
What is a peer-to-peer review?: A call between the treating provider and the payer's medical director to argue medical necessity before or after a denial. It is often the fastest way to overturn an authorization denial, and many payers only offer a narrow window to request it.
Why was a claim denied when I had an authorization?: Usually a mismatch: a different CPT code, more units than approved, a date of service outside the approved range, a different rendering provider or facility, or an authorization tied to the wrong plan.
What is gold-carding?: A payer program that exempts practices with consistently high approval rates from authorization requirements for specific services. Where offered, it is worth applying for — it removes work rather than speeding it up.

More on prior authorization

Payer-by-payer requirements, turnaround rules and appeal paths when an authorization is denied.

Read the guides