How Long Does Prior Authorization Take in 2026?

Prior authorization timelines depend on the payer, the type of service, and whether the request is standard or urgent. For payers affected by the CMS prior authorization rule, standard requests must be decided within 7 calendar days, while expedited requests must be decided within 72 hours.

Commercial insurance plans may follow different timelines, so practices should always confirm the specific payer’s requirements. The actual turnaround can also depend on whether the request is complete, requires additional clinical review, or needs more information before a decision can be made.

How Long Does Prior Authorization Usually Take?

Prior authorization timelines vary by payer, urgency, and the type of review required. Some requests can be approved quickly when all requirements are met, while others take longer because they need clinical review or additional documentation.

The 7-calendar-day and 72-hour standards should not be treated as universal timelines for every authorization. They apply to specific payers covered by the CMS rule, while commercial plans, drug authorizations, retroactive requests, and other specialized reviews may follow different requirements.

Also, the clock alone does not determine how quickly authorization is obtained. A complete request that clearly meets payer criteria may move much faster, while missing documentation or additional clinical review can add significant time.

Prior Authorization Timelines Under the 2026 CMS Rule

Beginning January 1, 2026, CMS requires certain impacted payers to make prior authorization decisions within specific timeframes for covered medical items and services:

• Standard requests: within 7 calendar days
• Expedited or urgent requests: within 72 hours

These requirements apply to Medicare Advantage organizations, state Medicaid and CHIP fee-for-service programs, Medicaid managed care plans, and CHIP managed care entities. Qualified Health Plan issuers on the Federally Facilitated Exchanges are included in other parts of the CMS rule, but they are excluded from the 7-day and 72-hour decision-timeframe requirement.

CMS also requires impacted payers to provide a specific reason when a prior authorization request is denied, which is intended to make it easier for providers to understand what needs to be corrected or resubmitted. These operational requirements took effect beginning in 2026.

One important exception is drug prior authorization. The 7-calendar-day and 72-hour requirements under CMS-0057-F do not apply to prior authorization decisions for drugs, so medication requests may follow separate Medicare, Medicaid, pharmacy benefit, or commercial payer rules.

For practices, the 2026 CMS rule creates a clearer maximum decision window for many medical prior authorization requests, but it does not mean every authorization will take exactly 7 days or 72 hours. Complete documentation and payer-specific requirements still affect how quickly a request is reviewed. Some payers also use the terms precertification and preauthorization differently, so it is worth checking the payer’s requirements before submitting the request to make sure you are following the right approval process.

What Can Make Prior Authorization Take Longer?

Prior authorization often takes longer when the payer cannot make a decision from the initial submission and needs additional review or information.

• Missing clinical documentation, such as progress notes, test results, treatment history, or supporting records
• Incorrect or incomplete request information, including diagnosis codes, procedure details, member information, or provider data
• Medical necessity review when the service does not clearly meet the payer’s criteria at the first level of review
• Requests for additional information from the payer, which can pause the process until the missing records are submitted
• Peer-to-peer review when the treating provider needs to discuss the case with the payer’s clinical reviewer
• Manual or fax submission, which can take longer to receive, enter, and track than an electronic request

The more complete and accurate the initial submission is, the less likely the request is to be delayed by avoidable follow-up.

How Long Do Different Types of Prior Authorization Take?

Prior authorization timelines can vary by the type of service being reviewed. Some requests move faster when the documentation clearly meets payer criteria, while others may need additional clinical review.

• Imaging: MRI, CT, and PET scan authorizations may be processed faster when the diagnosis, previous testing, and clinical notes clearly support the request.
• Procedures and surgery: These requests may take longer because payers often review medical necessity, prior treatment, procedure details, and site of service.
• DME: Timelines depend on the equipment, physician order, and medical necessity documentation required by the payer.
• Specialty medications: These often require formulary review, step therapy, previous treatment history, and supporting clinical records.
• Behavioral health: Authorization time can vary by level of care, especially for inpatient, residential, and intensive outpatient treatment.
• Cardiology: Advanced imaging, cardiac procedures, stress testing, and certain interventions may require additional clinical review.
• Orthopedics: Joint replacement, spine procedures, injections, and advanced imaging may require proof of conservative treatment or supporting imaging.
• Oncology: Chemotherapy, radiation, imaging, and other specialty treatments may involve detailed clinical review and payer-specific treatment criteria.
• Infusion therapy: Timelines can vary depending on whether the drug is reviewed under the medical or pharmacy benefit, as well as diagnosis and dosing requirements.
• Home health: Authorization may depend on eligibility, physician documentation, plan-of-care requirements, and the specific services requested.

There is no single timeline that applies to every specialty. The payer, plan, urgency of the request, and completeness of the documentation all affect how quickly a decision is made. Different types of authorization in medical billing can also follow different requirements and review paths.

What to Do When Prior Authorization Is Delayed

If a prior authorization is taking longer than expected, the goal is to find out where the request is stuck and what the payer needs to move it forward.

• Check the payer portal or call the payer to confirm the current authorization status.
• Make sure all clinical notes, test results, and supporting documents were received.
• Ask whether the request is pending additional information, clinical review, or a peer-to-peer discussion.
• Confirm whether the case meets the payer’s criteria for expedited review.
• Record reference numbers, call dates, and follow-up instructions for every payer contact.
• If the payer’s stated decision timeframe has passed, escalate the request through the appropriate provider-services or utilization-management channel.

If the service has already been provided before approval was obtained, the request may need to be handled differently. Some payers allow retro authorization in limited situations, while others have stricter rules and filing deadlines.

Conclusion

Prior authorization timelines are more predictable in 2026, but the actual turnaround still depends on the payer, request type, urgency, and how complete the submission is. Standard requests for impacted CMS payers must be decided within 7 calendar days, while expedited requests must be decided within 72 hours.

For practices, the bigger challenge is making sure requests are submitted correctly, tracked closely, and followed up before delays affect scheduled care. A missed document, unclear medical necessity, or slow payer response can still hold up treatment even when a formal decision window is in place.

If your team is handling a high volume of requests across multiple payers, our prior authorization services can help manage submissions, documentation, status tracking, payer follow-up, and unresolved requests so your staff has a clearer view of what is pending and what needs attention.