Does Medicaid Require Prior Authorization for Services?

Yes. Medicaid does require prior authorization for a range of non-emergency services, medications, and equipment, but the exact list depends on your state and whether you are in fee-for-service Medicaid or a managed care plan. Prior authorization is a green light from your Medicaid plan confirming that a requested service is medically necessary before you receive it. Approval doesn’t guarantee the final bill gets paid, since eligibility on the date of service still matters, but skipping prior authorization when it’s required almost always means a denied claim.

How the Approval Process Works

Your provider handles prior authorization, not you. The doctor, hospital, or supplier submits clinical records, a justification for the service, and any required forms to the Medicaid agency or your managed care plan.¹ Both fee-for-service programs and managed care organizations use the process to control costs and confirm that requested care is appropriate.

States and managed care plans have wide latitude to decide which services and drugs need approval.² Two people in different states, or even in different plans within the same state, can face different requirements for the same treatment, and lists change over time.

Services That Typically Need Prior Authorization

Requirements vary, but certain categories of care trigger prior authorization across most Medicaid programs. According to the Medicaid and CHIP Payment and Access Commission, these commonly include:¹

Prescription drugs not on the plan’s preferred drug list or formulary, and sometimes brand-name drugs when a generic exists. Plans can also cap how many prescriptions you fill without approval.
Durable medical equipment such as wheelchairs, hospital beds, and oxygen equipment.
Planned inpatient hospital admissions and extended stays beyond what was initially authorized.
Surgeries and procedures, both inpatient and outpatient.
Behavioral health services, including mental health treatment and substance use disorder services beyond an initial evaluation.
Rehabilitation services like physical therapy and occupational therapy.
Nursing facility placements and continued long-term care stays.
Non-emergency medical transportation.

For prescriptions, federal law requires Medicaid to respond to a drug prior authorization request within 24 hours and to dispense a 72-hour emergency supply while the decision is pending.¹

Emergency Care Is Never Blocked by Prior Authorization

You never need prior authorization for emergency care. Under the Emergency Medical Treatment and Labor Act, any hospital with an emergency department that accepts Medicare must screen and stabilize you regardless of insurance status or ability to pay.³ Medicaid managed care plans are also federally prohibited from requiring prior authorization for emergency services. The hospital can ask about coverage at check-in, but that question cannot delay your screening or treatment. Any plan that denies emergency coverage on prior-authorization grounds is violating federal law.

How Long the Plan Has to Decide

Federal regulations set maximum deadlines for Medicaid managed care plans, and those windows tightened starting in 2026:⁴

Standard requests must be decided within 7 calendar days of receipt. Before 2026, the window was 14 days.
Expedited requests, where a provider indicates that waiting could seriously harm your health, must be decided within 72 hours.
Either deadline can be extended by up to 14 additional calendar days, but only if you or your provider ask for the extension, or if the plan can justify to the state that more time is needed and the delay is in your interest.

These are ceilings, not defaults. Federal rules also require plans to act “as expeditiously as the enrollee’s condition requires,” so a plan that routinely runs the clock when a medical situation calls for faster action isn’t complying.⁴ Fee-for-service Medicaid follows state-established timelines, which generally mirror these deadlines.

If Your Request Is Denied

A denied prior authorization is not the end. Federal law guarantees Medicaid beneficiaries the right to challenge denials at multiple levels, and tight deadlines apply at every stage.

Appeal to Your Plan

If a managed care plan denies your request, file an appeal directly with the plan. You have 60 calendar days from the date on the denial notice.⁵ Your provider can help by submitting additional medical records or a more detailed clinical justification.

State Fair Hearing

If the internal appeal doesn’t go your way, you can request a state fair hearing, an independent review conducted by the state Medicaid agency rather than by your plan.⁶ Managed care enrollees have up to 120 days after the plan’s appeal decision to request a fair hearing.⁷ Fee-for-service beneficiaries have up to 90 days from the date the denial notice is mailed.⁸ Some states also offer an optional external medical review at no cost to you.

Keeping Services During the Appeal

If the denial reduces, suspends, or ends a service you already receive, you can ask for continuation of benefits while the appeal is pending. It doesn’t happen automatically. You must specifically request it and file the appeal within 10 calendar days of the plan sending the denial notice.⁹ Miss the 10-day window and you lose the right to continued services even if you still have time on the appeal clock. If you lose the appeal, you may be on the hook for the cost of services provided during continuation.

New Transparency Rules Taking Effect

The CMS Interoperability and Prior Authorization Final Rule is changing how Medicaid plans handle these requests. Starting in 2026, Medicaid managed care plans must publicly report prior authorization metrics on their websites, including approval and denial rates, average decision turnaround times, appeal outcomes, and a full list of services that require approval. Plans must also give a specific reason when denying a request rather than issuing vague boilerplate.¹⁰¹¹ Beginning January 1, 2027, Medicaid managed care plans and state fee-for-service programs must implement an electronic Prior Authorization API, letting providers submit and track requests digitally through their existing health record systems.¹²

Once plans start posting denial rates and turnaround times, you can compare how different plans in your state handle prior authorization before picking coverage.

Finding the Rules That Apply to You

The federal rules above are floors, not ceilings. States can set tighter deadlines, require fewer services to go through prior authorization, or offer more generous appeal rights. The specific services needing approval, the forms your provider files, and the procedural details all differ by state. To find out exactly what applies to you, check your state Medicaid agency’s website or call the member services number on the back of your Medicaid card. If you’re in a managed care plan, the member handbook lists every service that requires prior authorization and walks through the process step by step.

1
Medicaid and CHIP Payment and Access Commission. Prior Authorization in Medicaid
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Medicaid and CHIP Payment and Access Commission. Prior Authorization in Medicaid
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CMS.gov. You Have Rights in an Emergency Room Under EMTALA
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eCFR. 42 CFR 438.210 – Coverage and Authorization of Services
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eCFR. 42 CFR 438.402 – General Requirements
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eCFR. 42 CFR Part 431 Subpart E – Fair Hearings for Applicants and Beneficiaries
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Medicaid and CHIP Payment and Access Commission. Federal Requirements and State Options – Appeals
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eCFR. 42 CFR 431.221 – Request for Hearing
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eCFR. 42 CFR 438.420 – Continuation of Benefits While the MCO, PIHP, or PAHP Appeal and the State Fair Hearing Are Pending
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CMS.gov. CMS Finalizes Rule to Expand Access to Health Information and Improve Prior Authorization Process
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CMS.gov. CMS-0057-F
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CMS.gov. CMS Interoperability and Prior Authorization Final Rule CMS-0057-F