How Long Does a Prior Authorization Take: Timeline Explained
Most standard prior authorization requests are decided within 1 to 3 business days once the complete paperwork reaches the insurance company. Urgent requests can be decided within 24 to 72 hours. Why does one request clear in a day while another drags on for weeks?
Prior authorization is a coverage decision that the insurance company makes, not the prescriber. The treating doctor, or prescriber, sends the information that explains why the treatment is needed. Utilization management is the insurer's review process that decides whether a treatment is medically necessary and cost-effective before it is covered.
Patients with health insurance often meet this step before a scan, a surgery or a new medicine.
A simple medication request often clears in a few days, while complex or specialty requests can take a few weeks. A plan's own rules and the request's complexity decide the rest. The timeline starts only when the insurer has every document it needs, so a missing form adds days before the clock even begins.
Key Takeaways
Standard prior authorization requests usually take 1 to 3 business days once the paperwork is complete.
Urgent requests can be decided within 24 to 72 hours.
The insurance company makes the coverage decision, and the prescriber sends the information.
Complex or specialty requests can take a few weeks.
Missing paperwork adds days before the clock starts.
How Long a Prior Authorization Takes for a Medication
A pre-authorization usually comes back in 1 to 3 business days, and some plans take 5 to 7 days. Pre-auth means the same thing as prior authorization: the insurer must approve a medication before the plan pays for it. A medication request is a coverage approval from the insurer, and the prescriber sends it.
Expect the prior authorization process for a medication to take 1 to 3 business days. A prior authorization for a medication is the insurer's approval that must come before the plan covers the drug. Each plan sets its own requirements, so the same drug can clear faster at one insurer than at another.
A drug the plan has not approved may go unpaid, even when the prescriber says it is needed.
Standard and urgent timelines
Standard medication requests usually take 1 to 3 business days, and urgent requests can be decided within 24 to 72 hours. Prescription medication reviews usually run 24 to 72 hours, which is often quicker than a review for a medical service. The reviewer still needs a complete request before the clock can count down.
Why medication requests can take longer
Step therapy is a common reason for delay. Step therapy means the insurer wants the patient to try a lower-cost drug first, and a brand-name drug may not be covered until that trial is done. A prescription paid fully out of pocket needs no prior authorization, so no review happens at all.
Ask the pharmacy whether the request has reached the insurer, since a request still sitting in the prescriber's office cannot move at all.
What the Prior Authorization Process Involves
The prescriber's office submits the request, and the insurer makes the decision. The insurer is responsible for the preauthorization decision, while the prescriber is responsible for the request. The prior authorization process has five basic steps, and each one has a clear owner.
Prior authorization works in a few steps: the office sends the request, the insurer reviews it, and then the insurer decides. Large clinics may have a prior authorization specialist who handles the forms and the calls. A pharmacy may also notify the prescriber when a medication needs prior authorization.
The office sends the request with chart notes and medical codes.
The insurer reviews the request against its coverage rules.
The insurer asks for records, lab results or chart notes if anything is missing, which pauses the review.
The insurer decides to approve, deny, or request changes.
If the request is denied, the prescriber can file an appeal.
Documentation is the part most likely to stall, so the office keeps copies of everything it sends. A complete file gives the insurer nothing to ask for later. Ask the office for the date the request was sent, because that date is the one the insurer's clock is measured from.
Federal Deadlines for Prior Authorization Decisions
For many Medicare Advantage and Medicaid requests for medical services, the insurer must decide a standard request within 7 calendar days and an expedited request within 72 hours. The new CMS rule on prior authorization, called CMS-0057-F, starts January 1, 2026 for covered federal plans. The rule sets a decision deadline that applies to Medicare Advantage, Medicaid, and CHIP, but not to prescription drugs.
Plan or request | Standard decision | Expedited decision |
Medicare Advantage | 7 calendar days | 72 hours |
Medicaid and CHIP (fee-for-service and managed care) | 7 calendar days | 72 hours |
ACA Marketplace plans from a federally facilitated exchange | No federal deadline | No federal deadline |
Prescription drugs | No federal deadline | No federal deadline |
Prior authorization for Medicaid medical care takes up to 7 calendar days for a standard request. The deadlines apply whether the request comes by API, portal, fax, phone or another channel. Commercial group plans and self-funded ERISA plans fall outside the rule, and Qualified Health Plan issuers on the federally facilitated exchanges are excluded too.
In 2025, median standard responses took about 1 day in Medicare Advantage, Medicaid managed care, and the ACA Marketplace. Median expedited responses took about half a day in Medicare Advantage and about 1 day in Medicaid managed care and the ACA Marketplace. The deadline is a maximum, so the insurer must still respond as quickly as the patient's condition requires.
In eligible cases, a payer may extend a request by up to 14 additional calendar days. Certain CMS-regulated plans must add prior authorization APIs, which are computer links between the office and the insurer, beginning January 1, 2027. Deadlines count calendar time, so a weekend does not stop the clock: a request received at 1:00 AM on Sunday with a 72-hour deadline must be answered by 1:00 AM on Wednesday.
State Laws and Plan Types That Change the Clock
Whether a state deadline applies depends on who funds the plan. Prior authorization rules by state set their own limits, and state law can set a shorter decision deadline than the federal rule. State laws generally apply to state-regulated, fully insured commercial plans, but they do not reach every employer plan.
Fully insured state-regulated plans
A fully insured plan buys its coverage from an insurance company, and the insurer answers to the state. Many fully insured employer plans follow the state's prior authorization rules, including its decision deadlines. The federal CMS-0057-F timelines do not change decision timelines for prescription drugs, so a drug request may fall under state rules alone.
The insurance card and the plan documents show whether the plan is fully insured. Look for the name of the insurance company, since a fully insured plan carries the insurer's own name on the card.
Self-funded employer plans
A self-funded employer plan pays its own medical claims, and it often hires an insurer only to run the paperwork. A self-funded ERISA plan falls outside state insurance authority, so a state deadline may not apply to it. The plan's own written policy still sets a timeline, and that policy can be the only clock the patient has.
Ask the employer's benefits office whether the plan is fully insured or self-funded before assuming any state deadline applies.
Why Some Requests Stall
The most common delay is a request the insurer cannot act on because a document is missing. In a 2024 American Medical Association survey, 93% of physicians reported care delays linked to prior authorization. Many of those delays start with paperwork that never reached the insurer in complete form.
Missing paperwork and extra records
Incomplete clinical notes or incorrect medical codes slow a request, and the insurer must then ask for the missing parts. To get a prior authorization, the prescriber sends complete chart notes and the right medical codes the first time. Many offices still use fax or phone workflows, which lose time at each handoff.
An open records request stops the review until someone answers it. The survey also found that 82% of physicians said prior authorization sometimes causes patients to abandon a recommended treatment.
Peer-to-peer reviews and volume
A peer-to-peer review is a call between the prescriber and a medical director at the insurer. The medical director schedules that call, which can add days to the wait. The reviews happen only after the first decision is questioned, so they rarely speed up a stalled file.
Volume adds to the pressure. The average U.S. doctor completed 45 prior authorization requests each week, and the work often falls on staff who also handle patient calls. As many as one-third of patients caught in the process never pick up their medications.
Approval and Denial Rates Patients Should Know
Prior authorizations usually get approved, and insurers denied 12% to 18% of standard requests in 2025. A pre-authorization can be declined, and if a doctor does not get prior authorization, the patient may pay the cost. Most denials are not final, and the denial letter states the reason for the decision.
Plan type | Denial rate in 2025 | Denials overturned on appeal in 2025 |
Medicare Advantage | 12% | 67% |
Medicaid managed care | 14% | 47% |
ACA federally facilitated Marketplace | 18% | 43% |
Medicare Advantage and Medicaid denial rates
The gap between plan types is wide, and it has shifted over time. In 2023, Medicaid managed care had a 12.5% denial rate, compared with 5.7% for Medicare Advantage. A denial rate tells you how often insurers say no, not whether a specific request will be approved.
Patients should treat a denial as the start of a review, not the end of one. Insurers deny some requests because a record is missing, and that gap is often easy to fix.
Overturned denials
Many denials are reversed on appeal, and the reversal rate is high in every plan type shown above. A service given without approval may leave the patient paying the cost, so the timing of an appeal matters. Ask the office whether the denial can be reviewed before the service is scheduled.
A denial letter names the reason, so read it before asking for an appeal.
Steps to Speed Up a Prior Authorization
Ask the insurer directly what it is still waiting on. To speed up prior authorization for medication, a short call often shows where the request is stuck.
The urgent request label should be used only when a delay could seriously harm health. Ask the prescriber to mark the request urgent only in that case, because a marked request that does not qualify can lose credibility with the reviewer.
Requests for the prescriber
The prescriber can also ask whether a lower-cost option is available while the request is pending. A clinic that tracks each request by date usually moves faster than one that waits for a call. The prescriber's staff should send any records the insurer asks for on the same day.
Steps for the patient
Many patients never appeal: 89% of Medicaid enrollees whose requests were denied did not appeal to their managed care organization. An appeal can still succeed, so the next steps below are worth taking.
Confirm that the insurer has the request and the date it arrived.
Ask the prescriber whether a lower-cost alternative exists while the request is pending.
Check the plan's portal or call line each few days for a status update.
Keep copies of every letter and notice the insurer sends.
Write down the date of each call and the name of the person spoken to, since that record helps any appeal.
How Long an Approval Lasts and What to Do Next
The approval covers a set period, which can be weeks, months, or a number of visits. A preauthorization hold usually lasts a set period, and most do not run longer than 12 months. Once the period ends, the patient may need a renewal before the next dose or visit.
A renewal filed late can leave a patient without coverage for the medication.
A changed plan may cancel an approval, and the rules for that depend on state law. A denial moves into an appeal, and an appeal typically takes 30 days or more to finish. The decision on the appeal can change the coverage plan for the rest of the approval period.
Put the expiration date on a calendar when the approval arrives, so the renewal is filed before the medication lapses.
Conclusion
A standard request usually takes days, not weeks, when the paperwork is complete. The timeline depends on the type of request, the plan, and how complete the file is when it reaches the insurer.
Call the insurer for the status today, and ask for the decision date in writing.
FAQ
How long does a prior authorization take?
Most standard requests take 1 to 3 business days once the insurer has the complete paperwork, and urgent requests can be decided within 24 to 72 hours. The clock starts only after every needed document arrives, so a missing form can add days. Complex or specialty requests can take a few weeks, and a plan's own rules also set the pace.
What is the new CMS rule on prior authorization?
The new CMS rule, called CMS-0057-F, sets decision deadlines starting January 1, 2026. Covered federal plans must decide a standard medical request within 7 calendar days and an expedited request within 72 hours. The rule covers Medicare Advantage, Medicaid, and CHIP, but not prescription drugs or Qualified Health Plan issuers on the federally facilitated exchanges.
Who is responsible for preauthorization?
The insurer makes the preauthorization decision, not the prescriber. The prescriber's office gathers the chart notes and submits the request. Large clinics may have a prior authorization specialist who handles this work. The insurer can approve, deny, or ask for changes, and it may ask for more records first.
Do prior authorizations usually get approved?
Yes, most do, although insurers denied between 12% and 18% of standard requests in 2025. Medicare Advantage insurers denied 12%, Medicaid managed care insurers denied 14%, and ACA Marketplace insurers denied 18%. A denial does not end the matter, since many are reversed on appeal. Read the denial letter first, because it names the reason.
Can a pre-authorization be declined?
Yes, a pre-authorization can be declined, and the denial letter states the reason. Many denials do not last, because in 2025 between 43% and 67% of denials were overturned on appeal. Medicare Advantage denials were overturned 67% of the time, Medicaid managed care 47%, and ACA Marketplace 43%.
How long does a preauthorization hold take?
Most approvals last a set period and rarely run longer than 12 months. The approval may cover weeks, months, or a set number of visits, and the end date appears on the approval notice. A changed plan may cancel an approval, depending on state law. File the renewal before the end date so the medication does not lapse.
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