Michigan Medical Malpractice Statute of Limitations: Deadlines and Tolling

In Michigan, the medical malpractice statute of limitations gives you two years from the date of the act or omission that caused your injury to file suit.¹ If you did not immediately realize something went wrong, a separate discovery rule lets you file within six months of learning about a potential claim, but an absolute six-year cutoff applies no matter what.² A required pre-suit notice period further complicates the timing and traps people who wait too long to start.

When the Two-Year Clock Starts

The clock runs from the date of the malpractice itself, not from when you first felt symptoms or received a diagnosis. Michigan’s statute says the claim “accrues at the time of the act or omission that is the basis for the claim of medical malpractice, regardless of the time the plaintiff discovers or otherwise has knowledge of the claim.”²

That accrual rule also means Michigan does not recognize the “continuous treatment” doctrine used in some states. Even if the same doctor keeps treating you after the negligent act, the two-year period starts on the date of the error, not the last date of care.

The Six-Month Discovery Rule

Not every medical error announces itself. A surgical sponge left inside you might cause no symptoms for months. A misread lab result may not surface until a later test contradicts it. Michigan addresses this with a discovery rule: you may file within six months after you discover, or reasonably should have discovered, that you have a potential claim, when that date falls after the two-year period has already expired.²

“Discover” does more work than it looks like. The Michigan Supreme Court held in Solowy v. Oakwood Hospital Corp. that the six-month window opens when you become aware of a possible cause of action, not when you have confirmed one. Once you know about an injury and a possible link to something a doctor did or failed to do, the clock is running. A definitive diagnosis or second opinion is not required. Courts look at the “totality of information available” and apply a standard of reasonable diligence.³

If you rely on the discovery rule, you carry the burden of proving that you neither discovered nor should have discovered the claim at least six months before your filing window closed.² This is where most late claims collapse. Courts expect you to act on red flags, and letting suspicious symptoms sit without investigating can cost you the case.

The Six-Year Absolute Cutoff

Even with the discovery rule available, no medical malpractice claim can be filed more than six years after the date of the act or omission.² This is the statute of repose, and it is a hard wall. Discover an error seven years after it happened and the claim is barred regardless of how diligent you were.

The only exceptions to the six-year cutoff are for certain children’s claims and cases involving fraudulent concealment by the provider.

Deadlines When the Patient Is a Child

Michigan’s general tolling rule for minors gives a person who is under 18 when a claim accrues one year after they turn 18 to file.⁴ Medical malpractice claims have tighter, more specific rules that override the general provision:

If the child was under 8 at the time of the malpractice, the lawsuit must be filed by the child’s tenth birthday, or within the normal limitations period under the discovery rule, whichever gives more time.⁴
If the child was under 13 and the injury involves the reproductive system, the lawsuit must be filed by the child’s fifteenth birthday, or within the normal limitations period, whichever is later.⁴
If the child was 8 or older and the injury does not involve the reproductive system, the standard two-year period and discovery rule apply as if the child were an adult.

These deadlines are tighter than many parents expect. A birth injury claim, for example, must generally be filed before the child turns ten, not eighteen.

Tolling for Mental Incapacity

If you are legally insane at the time the malpractice occurs, you have one year after the incapacity ends to file, even if the normal limitations period has already expired.⁴ “Insane” under the statute means a mental condition severe enough to prevent you from understanding your legal rights. A formal judicial declaration is not required.

The incapacity has to exist at the time the claim accrues. A mental disability that develops after the malpractice date does not toll the deadline.⁴

Fraudulent Concealment by the Provider

When a healthcare provider deliberately hides the malpractice or misleads you about what happened during treatment, the deadlines can be extended. Michigan’s general fraudulent concealment statute allows you to file within two years after you discover, or should have discovered, the concealed claim.⁵ The malpractice accrual statute shifts a fraudulently concealed claim into a different limitations track, and Michigan courts have held that the six-year statute of repose can be tolled when a provider intentionally withheld information to prevent you from recognizing that something went wrong.²

Proving concealment is a high bar. You need to show the provider actively misled you or deliberately withheld information they knew was relevant. Simply failing to volunteer that an error occurred, without any affirmative deception, is harder to prove, though Michigan appellate courts have found that an “intentional failure to disclose known, pertinent information” can qualify.

Deadlines When Malpractice Causes Death

If the patient dies before the statute of limitations expires, or within 30 days after it runs, a personal representative of the estate can file the malpractice claim. The representative has two years from the date they receive letters of authority from the probate court to bring the action.⁶

Even with that extension, no claim stemming from the patient’s death can be filed more than three years after the original limitations period has run.⁶ If the personal representative dies or becomes legally incapacitated within two years of appointment, a successor representative gets one year from that event to file.

The practical point for families: getting a personal representative appointed promptly matters. The two-year window starts from the appointment date, so delays in probate eat into the filing time.

How the 182-Day Notice Period Affects Your Deadline

Michigan does not let you walk into court and file a malpractice lawsuit cold. You must send a written notice of intent to each potential defendant at least 182 days before filing.⁷ That is roughly six months of mandatory waiting before a complaint can be filed. The complaint itself must then be accompanied by an affidavit of merit signed by a qualified health professional.⁸

Because the notice period alone is nearly six months, waiting until the last stretch of your two-year deadline creates a real problem. Michigan addresses it by tolling the statute of limitations while the 182-day notice period runs. If your limitations period would expire during the notice window, the deadline is paused for the number of days remaining in the notice period after you sent it.⁹ The same tolling applies to the six-year statute of repose.

That tolling protection only works if your notice complies with the statutory requirements. A defective notice that doesn’t contain all of the required elements may not trigger the toll, leaving you exposed to a time-bar defense.

What Happens If You Miss the Deadline

A malpractice claim filed after the statute of limitations or the statute of repose has expired will be dismissed as time-barred.² The court will not reach the merits. It does not matter how clear the negligence was or how severe your injuries are.

Michigan courts have been firm that the statutory tolling provisions for malpractice are the exclusive means of extending the deadline. Equitable tolling, where a court uses its discretion to excuse a late filing, is essentially unavailable in Michigan medical malpractice cases. The Michigan Supreme Court in Trentadue v. Buckler Automatic Lawn Sprinkler Co. drew the line: when a statutory scheme controls limitations periods, accrual, and tolling, courts will not layer equitable exceptions on top of it. If you had the time the statute gives you and didn’t use it, the claim is gone.

The interaction between the 182-day notice requirement and the two-year deadline creates the most common timing trap. Realize at month 20 that you have a claim and you still need to send the notice of intent, wait for tolling to kick in, secure an expert for the affidavit, and file the complaint. Each step takes time, and a misstep on any one of them can be fatal to the case. The earlier you begin, the less any single delay can cost you.

1
Michigan Legislature. Michigan Code 600.5805 – Period of Limitations
2
Michigan Legislature. Michigan Code 600.5838a – Malpractice Claim Accrual and Discovery Rule
3
Justia Law. Solowy v. Oakwood Hosp. Corp.
4
Michigan Legislature. Michigan Code 600.5851 – Minors and Insane Persons
5
Michigan Legislature. Michigan Code 600.5855 – Fraudulent Concealment
6
Michigan Legislature. Michigan Code 600.5852 – Death of Person Entitled to Bring Action
7
Michigan Legislature. Michigan Code 600.2912b – Notice of Intent
8
Michigan Legislature. Michigan Code 600.2912d – Affidavit of Merit
9
Michigan Legislature. Michigan Code 600.5856 – Tolling of Statute of Limitations or Repose