Prior Authorization: How Long Does It Take?

You drop off a prescription, and the pharmacist says it "needs prior authorization." Suddenly your medication is stuck in paperwork — and nobody can tell you exactly when you'll get it. What is this requirement, why does it exist, and how long does it actually take? Here's the plain-English version.

What prior authorization actually is

Prior authorization is a rule your insurer puts on certain drugs: before the plan will pay, your doctor must submit paperwork showing the prescription meets the plan's criteria. That usually means confirming the diagnosis, the dose, and sometimes proof that a cheaper alternative was tried first.

It doesn't apply to everything — mostly expensive brand-name drugs, specialty medications, drugs with safety concerns or strict dosing rules, and prescriptions written for quantities above the plan's normal limit. Your everyday generic antibiotic almost never needs it; a new biologic often does.

Why do insurers do it? Plans describe it as cost control plus safety checking — steering prescribing toward cost-effective options and catching potentially unsafe orders. Critics argue it delays needed care. Both things can be true at once; either way, it's a paperwork gate between the prescription pad and the pharmacy counter.

How long does it take? The official clocks

For Medicare Part D plans, the timelines are set by federal rules, and they're specific. Once your plan receives the request, it must issue a decision on a standard coverage determination within 72 hours. For an expedited request — when waiting the standard time could seriously jeopardize your health — the deadline is 24 hours. These are CMS's published processing timeframes for Part D coverage determinations.

There's an important wrinkle: for exception-type requests, the clock doesn't start until the plan receives your prescriber's supporting statement. So "72 hours" can really mean "72 hours after your doctor's office sends the paperwork" — which is why the total wait you experience is often longer than the official number.

For commercial (employer) plans, there's no single federal clock like Part D's. Timeframes vary by plan and by state — some states regulate them — but many plans follow similar standard-versus-expedited windows. Check your plan's evidence of coverage or call member services for the exact numbers on your plan.

What actually slows things down

The official clock only starts once the plan has everything it needs. In practice, most of the waiting happens before that:

• Missing clinical documentation. The most common delay. The request goes in without the diagnosis details, chart notes, or lab results the plan requires — so the plan asks for more information and the clock effectively restarts.
• The back-and-forth. The plan faxes a request for records; the doctor's office is busy; days pass. This ping-pong between offices accounts for more delay than the plan's actual review.
• Timing. A request submitted late Friday often sits untouched until Monday. The official timeframes are measured in hours, but offices run on business days.
• Wrong or incomplete details. A mismatched diagnosis code, no record of a required prior drug trial, or a quantity above the plan's limit without justification — each one sends the request back to the start.

The takeaway: a complete, well-documented submission is the single biggest lever on speed. If your doctor's office asks you to confirm details or sign a release, do it promptly — it genuinely moves things along.

How to check the status

Don't just wait and wonder. You have several ways to find out where your request stands:

• Your insurer's portal or app. Many plans show prior authorization status online, including whether it's pending, approved, or needs more information.
• Member services. Call the number on your insurance card and ask for the status of the prior authorization. Get a reference or case number — it makes every follow-up call faster.
• Your pharmacist. The pharmacy sees the claim rejection and often the authorization status in its system. Pharmacists are frequently the first to know a request was approved — and the first to spot that one is stuck.
• Your doctor's office. They submitted the request. Ask whether the plan asked for additional information and whether it was sent — that's the question that uncovers most stalls.

What "expedited" means and when it applies

If applying the standard timeframe could seriously jeopardize your life, health, or ability to regain function, you or your doctor can request an expedited review — 24 hours under Part D rules. Your doctor typically needs to support the urgency; if the plan agrees that the situation qualifies, the faster clock applies. If the plan decides your situation doesn't qualify for expedited review, it will typically process the request under the standard timeframe instead — ask the plan to confirm the timeline in writing so you know what to expect.

If it's denied

A denial isn't the end of the road. The plan must send you a written notice explaining the reasons for the denial and describing your appeal rights — the first step is a redetermination, which is a fresh look at the request by the plan. Denials often come down to missing documentation, so a complete re-submission sometimes resolves it. That's a conversation for your doctor's office, which handles exceptions and appeals as part of its normal workflow. The federal appeals process for Medicare prescription drug decisions is described step by step on Medicare.gov.

While you're waiting: a practical checklist

• Ask your doctor or pharmacist what short-term options exist. In some situations a limited emergency supply or samples can bridge the gap while paperwork moves — ask, don't assume.
• Don't assume silence means denial. Check the status using the steps above before concluding anything.
• Confirm the plan has your current contact info. Decision notices go to the address and phone number on file — an old address means a missed letter.
• Flag urgency honestly. If you're running out of an ongoing medication, tell the doctor's office. Urgency changes how they prioritize the paperwork — and may qualify the request for expedited review.

Prior authorization is one of several utilization-management tools insurers use. A closely related one is step therapy — the "try this drug first" rule that often shows up in the same paperwork.