Does Medicaid Require Prior Authorization for Surgery?

Yes, Medicaid usually requires prior authorization for surgery when the procedure is non-emergency, but which specific surgeries need advance approval depends on your state and on whether you’re in a managed care plan or traditional fee-for-service Medicaid. Emergency surgery is the clear exception: federal law prohibits Medicaid managed care plans from requiring prior authorization for emergency care.¹ For everything else, plan on your surgeon’s office submitting a request and the plan issuing a decision within 7 calendar days under the federal standard that took effect in 2026.²

Which Surgeries Usually Need Prior Authorization

There is no single national list. Each state and each managed care plan sets its own rules, so the only way to be certain about your specific procedure is to check with your plan directly or ask your surgeon’s office to confirm before scheduling. That said, certain categories show up on prior authorization lists again and again. Expensive procedures, surgeries with nonsurgical alternatives, and anything raising a medical necessity question tend to require approval.

Bariatric surgery, including gastric bypass and sleeve gastrectomy, almost always with documentation of prior weight-loss attempts, comorbidities, and psychological evaluation.
Spinal procedures such as cervical and lumbar fusions, spinal neurostimulator implants, and facet joint procedures, where plans often want to see that physical therapy or other conservative treatment came first.
Elective joint replacement, particularly hip and knee, with confirmation that nonsurgical options have been exhausted.
Cosmetic and reconstructive procedures like rhinoplasty, eyelid surgery, and excess skin removal, where the plan wants proof the surgery is medically necessary rather than cosmetic.
Organ transplants, given cost, complexity, and ongoing care needs.
Inpatient surgeries generally. Many plans require authorization for any procedure that involves a hospital admission, regardless of what the surgery is.

Your surgeon’s office should handle the check, but you can also call the member services number on the back of your Medicaid card to confirm.

Emergency Surgery Is Different

If you need emergency surgery, prior authorization cannot stand in the way. Federal law requires Medicaid managed care plans to cover emergency services without prior authorization and regardless of whether the surgeon or hospital is in the plan’s network.¹ The test is the “prudent layperson” standard: if a reasonable person with average medical knowledge would believe the symptoms could seriously threaten their health without immediate treatment, it qualifies as an emergency.³

Plans cannot narrow that definition using lists of approved diagnoses, and they cannot refuse emergency coverage because the hospital didn’t notify them within a set number of days.³ Separately, under EMTALA, any hospital with an emergency department must screen and stabilize you regardless of insurance status or ability to pay.⁴ Never delay emergency surgery because authorization hasn’t come through. The billing gets sorted afterward.

How the Request Gets Submitted

For non-emergency surgery, your surgeon’s office starts the process. Staff send the plan clinical information supporting the procedure: medical records, diagnostic imaging, the specific procedure code, and documentation showing that less invasive treatments were tried or aren’t appropriate. Requests go through electronic portals, fax, or occasionally phone.

Completeness matters more than anything else here. Missing records, vague clinical notes, or an incorrect procedure code are the most common reasons a request gets delayed or denied. If you know the office has submitted a request, follow up within a few days to confirm the plan received everything it needs. This is where most avoidable denials happen. Not because the surgery isn’t necessary, but because the paperwork was thin.

Your provider should also verify your Medicaid eligibility before submitting. If coverage has lapsed or you’ve been reassigned to a different managed care plan, a request sent to the wrong entity wastes time and pushes your surgery further out.

How Long the Plan Has To Decide

For rating periods starting January 1, 2026, Medicaid managed care plans must issue standard prior authorization decisions within 7 calendar days of receiving a complete request, down from 14 days.² The same 7-day standard now applies to state fee-for-service Medicaid programs, which previously had no federal deadline at all.⁵

The plan can extend the 7-day window by up to 14 additional calendar days if you or your provider requests it, or if the plan can justify to the state that more information is needed and the delay serves your interest. In practice, this usually means the plan asked your doctor for additional records.²

When your condition requires a faster answer, your provider can request an expedited decision. Managed care plans must resolve expedited requests within 72 hours.² Your state may impose shorter timelines than these federal maximums.

If Your Surgery Is Denied

Denials are not rare. Reviewed Medicaid managed care plans denied prior authorization requests at an average rate of 12.5 percent, with individual plan rates ranging from 2 percent to 41 percent depending on the state and MCO.⁶ The denial notice must state a specific reason. The most common ones are:

Insufficient medical necessity, often because conservative treatments haven’t been tried.
Incomplete documentation, meaning the submission was missing records, test results, or clinical notes.
Coverage exclusion, where the procedure isn’t part of your Medicaid benefit package.
Eligibility issue, where your enrollment wasn’t active or you’re in a different plan.

Read the letter carefully. The reason tells you what to fix. A denial for incomplete documentation is an invitation to resubmit with better records. A denial for lack of medical necessity is worth appealing with a detailed letter from your surgeon explaining why alternatives won’t work. Many denials get reversed when the right information reaches the right reviewer.

Your Appeal Options

Internal Appeal Through Your Plan

The first step is an internal appeal with the plan that issued the denial. The denial notice must explain how to file and by when. You or your doctor can submit additional evidence such as specialist opinions, updated imaging, or documentation of failed conservative treatment. The appeal is reviewed by a different clinician than the one who made the original denial, and that clinician must have appropriate expertise in the relevant area.²

State Fair Hearing

Every Medicaid beneficiary has a federal right to request a state fair hearing when services are denied, reduced, or terminated. This right is rooted in the Social Security Act and exists independently of the internal plan appeal. An impartial state hearing officer reviews the decision, and the state must take final administrative action within 90 days of the hearing request in most cases.⁷

External Review

For denials involving medical judgment, you can request an external review by an independent third party unconnected to your plan. Written requests are due within four months of the final internal denial. Standard external reviews are decided within 45 days; expedited reviews for urgent medical situations must be resolved within 72 hours or less.⁸ The cost is either nothing or no more than $25, depending on the process your state uses.

Keeping Services During Appeal

If the denial reduces or terminates services that were previously authorized, you may be able to keep receiving them while your appeal is pending. To qualify, you must file the appeal and request continuation of benefits within 10 calendar days of the plan sending the denial notice.⁹ Services continue until the appeal or fair hearing is decided. If you lose the appeal, the plan may recover the cost of services provided during that period.

What You Can Do To Keep Things Moving

A survey found that 22 percent of Medicaid enrollees experienced problems with prior authorization in a single year.⁶ Many of those problems are preventable. Ask your surgeon’s office to confirm your Medicaid eligibility and plan enrollment before they submit the request. Request a copy of the submission so you can verify the procedure code matches what you and your surgeon discussed. If you haven’t heard back within five days, call your plan’s member services line and check the status yourself. Small nudges at the right moments are usually what turn a stalled request into a scheduled surgery.

1
Office of the Law Revision Counsel. 42 USC 1396u-2 – Provisions Relating to Managed Care
2
eCFR. 42 CFR 438.210 – Coverage and Authorization of Services
3
eCFR. 42 CFR 438.114 – Emergency and Poststabilization Services
4
Centers for Medicare and Medicaid Services. You Have Rights in an Emergency Room Under EMTALA
5
Centers for Medicare and Medicaid Services. CMS-0057-F Interoperability and Prior Authorization Final Rule
6
Medicaid and CHIP Payment and Access Commission. Prior Authorization in Medicaid
7
eCFR. 42 CFR Part 431 – State Organization and General Administration
8
HealthCare.gov. External Review
9
eCFR. 42 CFR 438.420 – Continuation of Benefits