Michigan Medicaid Prior Authorization: Timelines, Denials, Appeals

Michigan Medicaid prior authorization is the approval a provider must get from either the Michigan Department of Health and Human Services (MDHHS) or a Medicaid managed care plan before delivering certain services, and as of March 22, 2026, the state must issue standard decisions within 7 calendar days instead of the previous 14. Urgent requests are decided within 72 hours. Which office reviews your request, what documentation it demands, and how you appeal a denial all depend on whether you have fee-for-service Medicaid or are enrolled in a managed care plan.

Which Track Your Request Follows

Most Michigan Medicaid beneficiaries are enrolled in a managed care health plan, but a significant portion remain in traditional fee-for-service (FFS) Medicaid administered directly by MDHHS. The two tracks use different submission systems and different reviewers.

Fee-for-Service Medicaid

For FFS beneficiaries, providers submit prior authorization requests through the state’s CHAMPS online portal. CHAMPS validates both the beneficiary’s eligibility and the provider’s information at submission and returns an error if anything is incorrect. Once a request goes through, the provider receives a tracking number. If MDHHS approves the request, that tracking number becomes the prior authorization number used for billing.¹ Supporting documentation can be attached electronically or sent by fax.²

Managed Care Plans

When a beneficiary is enrolled in a Medicaid managed care plan, the provider sends the request directly to that plan rather than to MDHHS. Each plan operates its own submission portal, forms, and clinical review criteria. Medical necessity standards and documentation requirements can differ from plan to plan even though all plans must comply with the same federal and state regulations.

Either way, the requirement is the same: the service must be authorized before it is rendered, or Medicaid will not reimburse the provider.¹

Services That Commonly Need Authorization

The exact list varies between FFS Medicaid and each managed care plan. Providers should check the provider-specific chapter of the Medicaid Provider Manual or their managed care plan’s authorization list for current requirements.² Categories that commonly require review include:

All inpatient hospital admissions. Routine deliveries without sterilization may only require notification rather than full authorization.
Non-formulary prescription drugs and off-label uses.
Durable medical equipment above a dollar threshold (often $1,500 for purchase, $500 per month for rentals).
Out-of-network services.
Surgical procedures that could be considered cosmetic, including gender-affirming procedures and obesity surgery when medically necessary for a specific patient.
Organ and tissue transplants.
Skilled nursing facility stays and home health care.
Physical, occupational, and speech therapy beyond annual visit or unit caps.
Genetic testing and injectable or IV-administered medications.

Authorization also covers procedures that are not normally paid for but may be appropriate for a particular patient’s condition.²

How Long Decisions Take

Federal regulations now cap the time a managed care plan has to decide a standard prior authorization request at 7 calendar days, down from 14.³ Michigan’s FFS program adopted the same 7-calendar-day standard for requests submitted on or after March 22, 2026.¹

When a provider certifies a request as urgent because a standard timeline could seriously harm the patient’s health or functioning, the decision must come within 72 hours. Both deadlines can be extended by up to 14 additional calendar days if the beneficiary or provider asks for more time, or if the plan shows that additional information is needed and the extension benefits the patient.³

If the plan fails to make any decision within the applicable timeframe, that failure itself counts as an adverse benefit determination and triggers the beneficiary’s right to appeal.⁴

Why Requests Get Denied

The single most common reason for a denial is documentation that doesn’t clearly establish medical necessity. Reviewers look for clinical evidence tying the requested service to the patient’s specific diagnosis and treatment history. Vague or boilerplate justifications get denied. Strong submissions connect the patient’s clinical records, diagnostic findings, and prior treatment failures directly to the service being requested.

Incomplete submissions are the other persistent problem. Missing lab results, unsigned forms, or outdated clinical notes can lead to an outright denial rather than a request for additional information, depending on the plan. Providers who submit through CHAMPS get real-time validation of basic eligibility and provider data, which catches some errors at the front end.¹

When a reviewer asks for more information, responding quickly matters. A late response can push the decision past the deadline, and while a missed deadline gives the beneficiary appeal rights, it doesn’t automatically approve the service under Medicaid managed care rules the way it would under Michigan’s commercial insurance law.

Appealing a Denial

Both the provider and the beneficiary have options after a denial, and the steps depend on which type of coverage is involved.

Fee-for-Service

MDHHS recommends that FFS providers first contact Provider Support for an informal review of the denied claim. Many issues that providers call “appeals” are actually requests for a second look, and these can often be resolved without a formal proceeding.⁵

If informal review does not resolve the issue, providers can file a formal appeal with the Michigan Office of Administrative Hearings and Rules (MOAHR). The written request must be filed within 30 calendar days of the denial notice and must identify what is being disputed, explain why, and include supporting documentation.⁶

Managed Care

Beneficiaries enrolled in a Medicaid managed care plan follow a two-step process. The first step is an internal appeal filed with the plan itself. The beneficiary has 60 calendar days from the date of the denial notice to request this internal appeal, either orally or in writing. An oral, non-expedited request must be followed by a written, signed one.⁴

The plan must resolve a standard internal appeal within 30 calendar days. An expedited appeal, for urgent situations, must be resolved within 72 hours. Either timeline can be extended by up to 14 days if the beneficiary requests it or the plan justifies needing more information.⁴

There is one deadline inside the appeal deadline that matters more than any other. If you are already receiving a service and the plan denies its reauthorization, filing the internal appeal within 10 calendar days of the denial notice preserves your existing services while the appeal is pending.⁴ Miss the 10-day window and services stop; restarting them takes far longer than keeping them going during an appeal.

State Fair Hearing

If the internal appeal does not resolve the issue, the beneficiary can request a state fair hearing. Federal law gives beneficiaries up to 90 days from the date of the denial notice to file the request.⁷ MOAHR conducts the hearing, providing an independent review outside the plan’s own decision-making. Denial notices sent to beneficiaries must be in plain language and accessible to individuals with limited English proficiency or disabilities.⁸

Broader Coverage Rules for Children Under 21

The federal Early and Periodic Screening, Diagnostic, and Treatment (EPSDT) benefit gives Medicaid beneficiaries under age 21 substantially broader coverage than adults. Under EPSDT, Michigan must provide any medically necessary treatment to correct or improve a condition found during a screening, even if that treatment is not otherwise covered in the state Medicaid plan.⁹

That reshapes the denial landscape for pediatric services. A denial based on the service “not being covered” does not hold up when the patient is a child and the service is medically necessary. Mandatory EPSDT services include vision care and eyeglasses, hearing aids, dental treatment, and immunizations. Beyond those, the state may provide any medical or remedial care recognized under Medicaid, even if adults receive that service in a more limited form or not at all.⁹ Referencing EPSDT in the appeal often overturns pediatric denials once the reviewer applies that standard instead of adult coverage criteria.

Mental Health Parity in the Approval Process

The federal Mental Health Parity and Addiction Equity Act (MHPAEA) requires that prior authorization rules for mental health and substance use disorder services be no more restrictive than those applied to comparable medical and surgical services. This applies to Medicaid managed care plans and alternative benefit plans in Michigan.¹⁰

In practice, if a plan doesn’t require prior authorization for outpatient visits to a cardiologist, it cannot require prior authorization for outpatient visits to a psychiatrist in the same benefit classification. The restriction covers all utilization management tools, including the medical necessity criteria used to evaluate requests. A plan that applies stricter documentation requirements to behavioral health authorizations than to medical authorizations may be out of compliance with federal law.¹⁰ Suspected parity violations can be raised with MDHHS.

What Happens When You Switch Plans

Existing prior authorizations don’t always carry over automatically when a beneficiary moves between managed care plans or between managed care and FFS coverage. MDHHS continuity of care guidance requires plans to honor certain previously authorized services during the transition. At minimum, these protections apply under Michigan’s MI Health Link program and serve as a benchmark for managed care transitions more generally:

Surgeries authorized within 180 days before enrollment must be honored by the new plan.
Chemotherapy and radiation already underway must be authorized through the full course of treatment with the existing provider.
Organ and stem cell transplants: the new plan must honor the provider, the prior authorizations, and the existing care plan.
Durable medical equipment already authorized but not yet delivered must be honored, and ongoing authorizations must be reviewed for medical necessity.

¹¹

Gaps happen anyway. If you’re switching plans mid-treatment, contact the new plan before the transition date to confirm your authorizations will carry over. Do not assume the plans will coordinate on their own.

Federal Changes in 2026 and 2027

The CMS Interoperability and Prior Authorization final rule (CMS-0057-F) is reshaping Medicaid prior authorization nationwide in two phases.¹²

Starting in 2026, Medicaid managed care plans and state Medicaid agencies must make standard prior authorization decisions within 7 calendar days and expedited decisions within 72 hours, send specific denial reasons to providers, and publicly report prior authorization approval rates and processing times based on the previous year’s data.¹³ For the first time, beneficiaries and providers will be able to compare how different plans handle prior authorization.

By January 1, 2027, state Medicaid FFS programs must implement a Prior Authorization API that lets providers submit requests, check status, and receive decisions electronically through a standardized interface. Managed care plans must comply by the rating period beginning on or after January 1, 2027. The same timeline applies to the Provider Access API and the Payer-to-Payer API, designed to give providers real-time access to patient coverage information and to facilitate data sharing when patients move between plans.¹³ Michigan’s CHAMPS system already handles electronic PA submission for FFS providers, so the state has a head start on the technology side.

1
Department of Health & Human Services. Prior Authorization
2
State of Michigan. Prior Authorization
3
eCFR. 42 CFR 438.210 – Coverage and Authorization of Services
4
Michigan Department of Health & Human Services. Appeals and Grievances Technical Requirements
5
Michigan Department of Health & Human Services. Provider Tip – Claim Review and Appeal Process
6
Department of Health & Human Services. Appeal Information
7
eCFR. 42 CFR 431.221 – Request for Hearing
8
eCFR. 42 CFR 435.917 – Notice of Agency Decision Concerning Eligibility, Benefits, or Services
9
eCFR. 42 CFR Part 441 Subpart B – Early and Periodic Screening, Diagnosis, and Treatment of Individuals Under Age 21
10
Medicaid.gov. Parity
11
Michigan Department of Health & Human Services. MI Health Link Continuity of Care Guidance
12
CMS. CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F)
13
CMS. Prior Authorization API