Michigan's prior authorization law, Public Act 60 of 2022, now codified at MCL 500.2212e, gives a state-regulated insurer 72 hours to answer an urgent request and 7 calendar days for a non-urgent one. Miss the deadline without granting, denying or asking for more information, and the request is treated as granted. The law covers commercial plans regulated by the Department of Insurance and Financial Services (DIFS), not Medicare Advantage, Medicaid or self-funded employer plans. Since January 1, 2026, a federal rule puts the same 72 hours and 7 days on Medicare Advantage, Medicaid managed care and federal exchange plans. And the state's own data shows that when a Michigan practice appeals a denial, it wins about a third of the time on medical services, but almost nobody appeals.
In short
- Michigan insurers: 72 hours urgent, 7 calendar days non-urgent, or the request is deemed granted (MCL 500.2212e).
- Federal payers covered by CMS-0057-F: the same 72 hours and 7 days since January 1, 2026, plus a specific reason for every denial (CMS).
- In DIFS's 2025 report, 36% of medical appeals and 42% of prescription appeals reversed the denial, yet only 8% of medical denials were appealed (DIFS, 2025).
- Physicians report 40 prior authorizations and 13 hours of physician and staff time a week (AMA, 2026).
Why prior authorization still eats a Michigan practice's week
The AMA's 2025 Prior Authorization Physician Survey, released May 13, 2026 from 1,000 practicing physicians, puts numbers on what front desks already know: 40 prior authorizations per physician per week, 13 hours of physician and staff time, 95% saying it delays necessary care, 79% reporting patients who abandon treatment over it, and 26% reporting a serious adverse event. Forty percent employ staff who work only on prior authorization.
The rules are better than they were. The problem is that a practice now runs on two clocks with different owners. Fully insured commercial plans regulated by DIFS answer to Michigan law. Medicare Advantage, Medicaid health plans and Marketplace plans answer to CMS. A self-funded employer plan administered by the same insurer answers to neither. The patient sees one insurance card.
What Michigan's own data shows
MCL 500.2212e requires insurers to report their prior authorization numbers to DIFS each year, and DIFS to publish them in a standard report every October 1. The 2025 report is the latest on DIFS's prior authorization page as of this writing. It covers insurers' prior plan year:
| Category | Requests | Denied | Appeals | Reversed |
|---|---|---|---|---|
| Medical | 1,189,810 | 90,757 | 7,365 | 2,649 |
| Prescription | 430,993 | 159,460 | 7,358 | 3,104 |
| Mental health and SUD | 110,169 | 8,122 | 243 | 111 |
Read it from a practice's side. Medical requests were denied 7.6% of the time; prescriptions 37%. Of medical denials, 86.9% gave medical necessity as the reason. Of prescription denials, the top reason was "lack of clinical or supporting documentation," 67,262 cases, 42% of the total. And 156,170 medical requests, 13%, were still not submitted electronically, even though the law requires insurers to offer an online route.
The appeal numbers are the ones to act on. Roughly one medical denial in twelve was appealed. When it was, the denial was reversed 36% of the time.
How to use the Michigan prior authorization law at the front desk
- Identify the clock at check-in. Ask whether the plan is fully insured commercial, Medicare Advantage, Medicaid managed care, a Marketplace plan or self-funded through an employer. The answer decides whether Michigan law, the CMS rule or neither sets the deadline.
- Submit electronically and keep the timestamp. Michigan's 72 hours and 7 days run from "the date and time of submission." The insurer's portal receipt is your evidence. A fax confirmation is weaker, and the CMS rule is moving payers toward an API by January 1, 2027.
- Mark urgent requests as urgent, with the reason. The statute defines urgent as a condition that "may seriously jeopardize" the patient's life, health or ability to regain maximum function. Write which part applies; it is what the reviewer reads first.
- Diary the deadline the day you submit. Day 3 for urgent, day 7 for non-urgent. On a DIFS-regulated plan, silence past the deadline means the request is considered granted. Note it, and ask the insurer to confirm in writing.
- Send the clinical documentation with the first request. On prescriptions, missing documentation was the top denial reason in Michigan's 2025 report, ahead of medical necessity. Chart notes, prior therapies tried and failed, and test results go in the first submission, not the second.
- Read the denial reason, then decide on appeal. Since January 2026 federal payers must give a specific reason. If it is documentation, resubmit. If it is medical necessity, note that under Michigan law an adverse determination on a non-pharmacy benefit must be made by a licensed physician, and ask for that reviewer's name. Michigan's numbers say an appeal is worth filing.
- Check what your payers have published. CMS required impacted payers to post their prior authorization metrics by March 31, 2026. KFF found the figures aggregated across all services, which limits them, but a plan approving 95% of requests is one where a denial deserves a second look.
The mistake most practices make at step 6
They do not appeal. The 2025 DIFS figures show 90,757 medical denials and 7,365 appeals. Some denials are right, and some are better answered with a corrected resubmission. But a practice that never appeals is accepting every denial an insurer issues, including the 36% that reviewers reverse when asked. Track appeals by payer and by service for a quarter; the pattern tells you where to push.
Where this fits
Our work for Michigan practices covers the front desk: calls, reminders, intake and the insurance question. For prior authorization the relevant piece is back office exception flagging: a list of what did not happen, such as a request with no decision past its deadline or a denial with no next step recorded. It does not submit requests to payers, argue medical necessity or decide what to appeal; that stays with your staff. For other payer changes this season, see the 2027 physician fee schedule and Healthy Michigan Plan work requirements.
Pick one payer this week, pull last quarter's denials, and count how many you appealed.
