How prior authorization works
- Your clinician orders care that your plan lists as needing approval, such as an imaging scan, a procedure, a specialty drug or equipment.
- The office sends the request to your plan with the diagnosis, the planned care and supporting notes. Usually the provider files it, not you.
- The plan decides to approve, deny, or ask for more information.
- You get care after approval. If a required approval is skipped, the plan may not pay. Emergencies are the exception.
To find out whether a service needs approval, check your plan's coverage documents or member website, or call the number on your insurance card. Ask for the approval reference number and the dates it covers, and keep them.
How long prior authorization takes
| Plan type | Standard request | Urgent request |
|---|---|---|
| Employer plans (federal claims rules) | Decision within 15 days; the plan can extend once by up to 15 days with notice | Within 72 hours |
| Medicare Advantage, Medicaid and CHIP fee-for-service, Medicaid and CHIP managed care (since January 1, 2026) | Within 7 calendar days | Within 72 hours |
If your health could be seriously harmed by waiting, ask your clinician to mark the request urgent (expedited).
The 2026 and 2027 CMS prior authorization rules
The CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F) applies to Medicare Advantage plans, Medicaid and CHIP fee-for-service programs, Medicaid managed care plans, CHIP managed care entities, and Qualified Health Plan issuers on the federal exchanges. Employer plans are not on that list.
- Since January 1, 2026: these plans must give a specific reason when they deny a request, and all of them except federal exchange Marketplace plans must decide urgent requests within 72 hours and standard requests within 7 calendar days. These rules don't apply to prescription drug prior authorizations.
- By March 31, 2026: affected plans had to start posting yearly prior authorization statistics on their websites.
- By January 1, 2027: affected plans must offer an electronic prior authorization connection for providers, and add prior authorization information to the app connection members use to see their records.
Does Medicare require prior authorization?
Original Medicare: in most cases you don't need prior authorization. One exception is the WISeR model, running January 1, 2026 through December 31, 2031 in New Jersey, Ohio, Oklahoma, Texas, Arizona and Washington. It adds prior authorization or pre-payment review for a short list of services, such as skin and tissue substitutes, electrical nerve stimulator implants and knee arthroscopy for knee osteoarthritis. CMS says it does not change what Medicare covers and excludes emergency services.
Medicare Advantage: plans may require approval before they cover certain services or supplies. WISeR does not apply to Medicare Advantage.
What to do if prior authorization is denied
- Read the denial notice. Plans must explain why they denied the request and how to dispute it.
- Ask your clinician to resubmit or add records if the plan says information was missing.
- File an internal appeal within 180 days of the denial notice. For care you haven't received yet, the plan must finish the appeal within 30 days. Urgent appeals are faster.
- Ask for an external review within 4 months of a final denial. An independent reviewer decides, and the plan must accept that decision.
See how to appeal a health insurance denial for the full steps and a letter outline. If your plan won't cover something you still want, Gabriel Plus has member prices close to cost on lab tests, supplements, prescriptions and bioregulators. Gabriel is a membership, not health insurance.
Common questions
Does prior authorization mean my plan will pay?
No. HealthCare.gov says preauthorization isn't a promise your plan will cover the cost. Your deductible, coinsurance and other plan rules still apply.
Who submits a prior authorization request?
Usually your doctor's office sends it to your plan. Call your plan to confirm it was received and ask for the reference number.
How long does prior authorization take?
Under federal claims rules, employer plans generally have up to 15 days for a standard request and 72 hours for an urgent one. Medicare Advantage and Medicaid plans have 7 calendar days for standard requests since January 2026.
Do I need prior authorization in an emergency?
No. Plans can require preauthorization for certain services, but not for emergency care.
What is the difference between prior authorization and a referral?
A referral is a written order from your primary care doctor to see a specialist, which some plans require. In many HMO plans you need one before seeing anyone other than your primary care doctor. Prior authorization is your plan's own approval that a specific service is medically necessary.
Sources
- Preauthorization (glossary) HealthCare.gov
- CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F) fact sheet Centers for Medicare & Medicaid Services
- WISeR (Wasteful and Inappropriate Service Reduction) Model Centers for Medicare & Medicaid Services
- Compare Original Medicare and Medicare Advantage Medicare.gov
- Filing a claim for your health benefits U.S. Department of Labor, EBSA
- External review HealthCare.gov
This guide is general information, not medical advice. It does not replace a visit with a licensed clinician. Gabriel membership is not health insurance.