Michigan Medical Malpractice Statute of Limitations: Deadlines, Exceptions, and Filing Rules

Meta description: Learn how Michigan’s medical malpractice statute of limitations works, including the two-year deadline, discovery rule, six-year limit, notice of intent, and exceptions.

Michigan medical malpractice deadlines can depend on when the alleged negligence occurred, when an injury was discovered, and whether special rules apply. Missing a deadline may prevent a claim from moving forward, even when the underlying care appears negligent. Michigan also requires advance notice and specific supporting documents before or when a lawsuit is filed. The rules are technical, and calculating a filing date can require reviewing medical records and legal authorities. This guide explains the main time limits and procedural steps; it is general information, not legal advice.

Michigan’s Basic Medical Malpractice Deadline

In general, a Michigan medical malpractice lawsuit must be filed within two years after the claim accrues. For medical malpractice, the claim generally accrues when the act or omission forming the basis of the claim occurred—not necessarily when the patient discovered the resulting injury. The rule appears in [Michigan Compiled Laws § 600.5838a](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-5838a).

For example, if a healthcare provider allegedly makes a treatment error on March 1, the ordinary two-year period may run from that date. The date of a later diagnosis does not automatically reset the clock. The exact accrual date can be disputed, particularly when care involved multiple visits, procedures, or providers. A lawyer may need to determine which specific act or omission is at issue.

Michigan’s medical malpractice law applies to claims against healthcare professionals and facilities where the claim arises from professional medical care. Whether a particular case is legally classified as medical malpractice can affect both its deadline and the procedures it must follow. A claim described as ordinary negligence by a patient may still be treated as malpractice if deciding it requires evaluating professional medical judgment.

The Discovery Rule and the Six-Month Period

Michigan law provides a discovery rule that may allow a claim to be filed after the ordinary two-year period. A patient may generally commence an action within six months after discovering, or when the patient should have discovered, the existence of the claim, if that period is later than the ordinary two-year deadline. The rule does not simply start when a patient learns the full extent of an injury or receives a second medical opinion.

The key question is usually when the patient knew, or reasonably should have known, enough facts to recognize a possible connection between the injury and medical care. The patient does not necessarily need a complete expert analysis or certainty that malpractice occurred. In Solowy v. Oakwood Hospital Corp., the Michigan Supreme Court discussed the discovery rule and the point at which a claimant has reason to believe that a possible claim exists. See [Solowy v. Oakwood Hospital Corp., 454 Mich. 214 (1997)](https://scholar.google.com/scholar_case?case=14760743938564808375).

Applying the rule is fact-specific. A complication alone does not always establish malpractice, but unexplained symptoms, a provider’s disclosure of an error, or information in medical records may be relevant. Patients should avoid assuming that the six-month period begins only after a lawyer or expert confirms the case.

The Six-Year Limit and Statute of Repose

Michigan generally bars a medical malpractice action filed more than six years after the act or omission that forms its basis. This outer deadline is commonly called a statute of repose. It can end the time to sue even if the patient did not discover the injury until later, subject to statutory exceptions and other rules that may affect the calculation.

The six-year period is not an additional six years after the two-year deadline. It is a separate outer limit measured from the underlying act or omission. A patient whose claim is discovered late should therefore assess both the six-month discovery period and the six-year limit rather than relying on only one date.

Michigan law includes exceptions to the six-year limit, including circumstances involving fraudulent concealment and certain injuries that were not, and could not reasonably have been, discovered within the statutory period. The wording and application of these exceptions are narrow and depend on the facts. Relevant provisions include [MCL § 600.5838a](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-5838a) and [MCL § 600.5855](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-5855). A patient should not assume that an exception applies without legal review.

Notice of Intent Before Filing

Before filing most Michigan medical malpractice lawsuits, a claimant must give each intended defendant a written notice of intent (NOI). Under [MCL § 600.2912b](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-2912b), the notice generally must be served at least 182 days before the lawsuit is filed. It must include required information, such as the factual basis for the claim, the applicable standard of care, how it was allegedly breached, and the claimed injury.

The notice period can affect the limitations calculation. Michigan’s tolling statute, [MCL § 600.5856](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-5856), addresses when a limitations period is suspended, including in connection with a properly served notice of intent. The tolling details depend on timing and compliance with statutory requirements. Because serving an NOI does not make every deadline calculation straightforward, the notice should be prepared and served early enough to preserve the claim.

The law also provides for a response period and circumstances in which the waiting period may differ. The applicable schedule can depend on the notice, the defendant’s response, and whether another notice was previously served. Claimants should verify the current statutory requirements rather than treating 182 days as an inflexible rule for every situation.

Affidavit of Merit Requirements

A medical malpractice complaint generally must be accompanied by an affidavit of merit from a qualified healthcare professional. Under [MCL § 600.2912d](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-2912d), the affidavit must address the applicable standard of practice, how the defendant allegedly failed to meet it, the actions that should have been taken, and how the breach caused the injury.

Michigan law sets qualifications for the expert who signs the affidavit, including requirements connected to the relevant specialty and professional practice. The proper qualifications depend on the defendant and the issues in the case. Failure to meet affidavit requirements can create serious problems, so this step usually requires both legal and medical review.

Special Rules for Minors and Other Circumstances

Claims involving children may be subject to special timing rules under [MCL § 600.5851](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-5851), including provisions for claims that accrue while a child is under eight. The applicable deadline depends on the child’s age, the type and timing of the claim, and the interaction between the minority rules and medical malpractice statutes. Parents should not assume that a child automatically has until a particular birthday to file.

Other circumstances may also change how a deadline is calculated. These can include legal disability, fraud or concealment, the identity of the defendant, or a claim involving a government agency or employee. Claims against public entities can carry additional notice requirements and shorter deadlines. Each defendant and claim should be evaluated separately.

Continuing treatment does not automatically mean the deadline starts only when treatment ends. Courts examine the specific acts, omissions, and legal theory involved. Patients should not rely on an assumption that ongoing care pauses the limitations period.

How to Protect a Potential Claim

Time-sensitive steps can help preserve information and enable a lawyer to evaluate deadlines:

• Record key dates: Note appointments, procedures, diagnoses, disclosures, and when the patient first suspected that care may have caused harm.
• Request medical records: Obtain records from relevant providers and facilities, including test results, imaging, prescriptions, and discharge documents.
• Keep related documents: Preserve bills, insurance communications, photographs, and written messages with providers.
• Seek prompt legal review: A Michigan medical malpractice attorney can assess accrual, discovery, repose, notice, and affidavit requirements.
• Avoid waiting for certainty: Investigation, expert review, and notice preparation take time, and discovery deadlines may be shorter than expected.

Records can help establish what happened and when, but they do not by themselves determine whether the legal deadline has expired. A careful review should identify every potentially responsible provider and the dates relevant to each alleged act or omission.

Common Michigan Medical Malpractice Deadline Questions

Does the clock start when the patient discovers the injury?

Usually, the ordinary two-year period runs from the alleged act or omission, not discovery. The discovery rule may provide a later filing window in qualifying cases, subject to the six-year limit and applicable exceptions.

Does sending a notice of intent file the lawsuit?

No. A notice of intent is a required pre-suit step in most cases, not the complaint itself. The lawsuit must still be filed, and the notice must comply with statutory requirements.

Can a patient file more than six years after the treatment?

Sometimes, but only if a legally recognized exception or other rule applies. Fraudulent concealment and certain undiscoverable injuries are examples addressed by Michigan law; their application depends on specific facts.

Is the deadline the same for every healthcare provider?

Not necessarily. Different defendants, public-entity rules, minors’ claims, and the nature of the alleged conduct can affect the analysis. A deadline should be calculated for each claim and defendant.

Sources and Legal References

The principal statutory references are [MCL § 600.5838a](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-5838a) (medical malpractice accrual and limitations), [MCL § 600.2912b](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-2912b) (notice of intent), [MCL § 600.2912d](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-2912d) (affidavit of merit), [MCL § 600.5851](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-5851) (disability and minority provisions), and [MCL § 600.5856](https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-600-5856) (tolling). Statutes and court decisions may change or be interpreted in later cases. A Michigan attorney can apply current law to the facts and calculate any applicable deadline.