External review in Michigan: PRIRA and the DIFS appeal

What PRIRA covers, and the plans it cannot touch

Michigan's external review is the Patient's Right to Independent Review Act process, run by DIFS out of its Office of Appeals and Market Regulation. CMS lists Michigan among the states whose own program meets the federal parallel standards, so an eligible denial stays in Lansing rather than routing to the federal contractor. The request is filed with the regulator directly; the insurer has no gatekeeping role in it.

• PRIRA reaches coverage Michigan regulates. DIFS's own request form lists what it does not reach: non-governmental self-funded (ERISA) plans, Medicare and Medicare Supplement, workers' compensation, auto insurance, and federal employee benefit programs.
• There is no filing fee. Nothing on the online request, the paper FIS 0018, or the consumer page charges the patient, and nothing charges a provider filing as the authorized representative.
• The Director's decision binds the carrier. On a reversal, the carrier must approve the coverage immediately.

127 days on the DIFS page, 120 in the statute

DIFS says 127 days wherever it speaks to consumers — the online portal, the consumer page, the FAQ — and its consumer materials measure that from the date of the final adverse determination rather than from the day it arrived. MCL 550.1911(1) says 120 days after the date of receipt of the notice. Both numbers are individually verifiable, and nothing DIFS or the Legislature publishes reconciles them, so the conservative reading is the one to work from: date the clock from the date printed on the insurer's final denial, and file inside 120 days of it. That sits inside both.

Expedited review is a separate and much tighter track. The request has to reach DIFS within 10 days of receipt of the adverse determination, the patient must already have asked the plan for an expedited internal review, a letter from the treating physician has to be attached, and only pre-service denials qualify. A post-service claim cannot be expedited no matter how urgent the money problem is.

How to file with DIFS

1. 1

   Finish the plan's internal appeal

   PRIRA follows the insurer's final adverse determination. Keep that notice — DIFS requires it with the filing, along with the reasons for appealing, the supporting documentation, and a signed health-information release.

2. 2

   Get named as the patient's authorized representative

   The online form states the process is for patients, parents and legal guardians, and is not a channel for provider claim-payment problems. Both the online and paper forms have a representative field; for a patient 18 or older, DIFS asks that a FIS 0018 with sections 4 through 7 completed accompany the filing. Once named, the practice becomes the department's sole contact on the case.

3. 3

   Pick one of the four channels

   Online at difs.state.mi.us (needs a working email address and the ability to attach documents); paper form FIS 0018 mailed to DIFS, Office of Appeals and Market Regulation – Appeals Section, P.O. Box 30220, Lansing, MI 48909-7720; fax 517-284-8838; or email [email protected]. Questions go to 877-999-6442.

4. 4

   Send the record complete

   If the request is incomplete, DIFS identifies what is missing and gives 30 days to supply it. Once the case is accepted, the filer has 7 business days to add anything further.

Who decides — and the clocks that govern it

Under MCL 550.1911(7), the Director assigns an approved independent review organization the moment DIFS accepts a request that turns on medical necessity or clinical review criteria. The carrier plays no part in choosing the reviewer. Michigan then adds a step most states do not have: if the dispute appears purely contractual — whether the benefit is covered at all, whether the coding is accurate — MCL 550.1911(8) lets the Director keep the case and conduct the review in-house without an IRO, and requires moving it to an IRO the moment medical-necessity questions surface. That distinction is worth reading before filing, because it decides whether a physician or the department reviews the coding argument. When an IRO does review, what it produces is a recommendation; the Director issues the binding decision and may depart from the IRO, stating why.

• Reviewability screen: 5 business days from receipt of the request.
• After acceptance: 7 business days for the filer to submit additional documents, and 7 business days for the carrier to deliver its file — if the carrier misses that, the Director may terminate the review and reverse the denial outright.
• IRO recommendation: 14 days from assignment. The Director's binding decision: 7 business days after receiving it, or 14 days where the case stayed in-house as a contract dispute.
• Expedited review: decided within 72 hours of the request.
• After the decision, an aggrieved party has 60 days to petition for judicial review, in the circuit court where the patient resides or in Ingham County Circuit Court (MCL 550.1915).
• DIFS declines to publish an end-to-end figure, saying total time varies with the nature and complexity of the claim.

What Michigan's own numbers say

DIFS posts every PRIRA order as an individual, searchable PDF naming the health plan, the service at issue, the IRO's findings and the outcome. Few states publish at case level. Pulling the orders in your service line before filing shows what reviewers in this state actually weighed.

The PRIRA table in the department's 2025 annual report is blunt about where cases die. Of 2,096 requests received, 1,172 were not accepted because external-review criteria were not met — more files ended at that screen than were decided on the medicine. Of the 862 orders that did issue, 574 upheld the plan and 288 reversed it, 33.4%. Another 133 carriers reversed themselves before an order issued, and 63 requests were withdrawn. Counting the voluntary reversals, 421 of the 995 files resolved on the merits ended in the patient's favor, about 42%. DIFS also reported PRIRA appeals rising 22% year over year in 2024, and more than doubling since 2020.

Prior authorization under MCL 500.2212e

Public Act 60 of 2022 gave DIFS enforcement authority over how Michigan insurers run prior authorization, and the department reads the statute in ways that favor the practice. Insurers and their utilization review organizations must offer a standardized electronic PA transaction — the statute's definition of electronic expressly excludes facsimile — using the standards named in DIFS Bulletin 2023-05-INS, with the process descriptions filed in SERFF. New or amended PA requirements must be filed with DIFS at least 60 days before they take effect.

Insurers also file aggregated PA data with DIFS on form FIS 2379, and the department publishes it de-identified. The Section 2212e Report: 2025 counts 1,189,810 medical PA requests with 90,757 denied, and only 7,365 of those denials appealed — of which 2,649 came back reversed, 36% of the appeals filed. Prescription denials fared better still: 159,460 denied, 7,358 appealed, 3,104 reversed, 42%. Mental health and substance-use appeals were the rarest and the most successful, 243 filed and 111 reversed, 46%. Medical necessity was the leading denial reason at 78,900; inpatient hospital admission the most-denied service at 9,453, then sleep studies at 5,929; the most-denied drugs were Wegovy (18,851), Zepbound (14,121), Ozempic (11,484) and Mounjaro (11,240). Roughly 8% of denied medical requests were appealed at all.

DIFS's published FAQ settles several scope arguments a payer may raise:

• 2212e applies to an out-of-state provider billing a Michigan-regulated insurer.
• It applies to concurrent requests, where the patient is already receiving the care.
• A contract that bars balance-billing the member is not an exemption; no member liability does not put the request outside the statute.
• Emergency services generally cannot be conditioned on prior authorization, and DIFS cites 42 USC 300gg-111 and 45 CFR 149.110 for it.
• It does not reach Medicare Advantage, Medicare, or Medicaid.

The second Michigan track: auto no-fault utilization review

Because Michigan is a no-fault auto state, it runs a second external appeal with no counterpart in most of the country, and this one a provider files in its own name. When an auto insurer or the MCCA issues a utilization review determination the practice disputes, the provider appeals directly to DIFS within 90 days of that determination by emailing form FIS 2356 to [email protected]. DIFS does not accept these by fax and does not accept additional documents after filing, so the packet has to be complete when it goes out.

The volume is comparable to PRIRA's. The 2025 annual report counts 2,205 UR appeal requests received and 1,040 provider appeals accepted, resolving into 360 upheld, 268 reversed, and 337 settlements. Roughly a third of accepted provider appeals ended in a settlement rather than a determination.