Wisconsin
Medical Malpractice Laws in Wisconsin (2026): Deadlines & Caps
Independently fact-checked against primary sources (last audited August 18, 2026). · Reviewed by the RecordingLaw editorial team. · Law checked current as of August 18, 2026. · 8 primary sources cited on this page. How we verify our legal content
Medical malpractice in Wisconsin is a claim that a doctor, hospital, nurse, or other licensed health care provider failed to meet the accepted standard of care and harmed a patient. Wisconsin combines strict filing deadlines with a $750,000 cap on noneconomic damages, a mandatory pre-suit mediation step, and a state-run compensation fund that pays large awards. This page explains the current deadlines, the cap status, and the pre-suit requirements under Wisconsin law. It is general legal information, not legal advice for your situation.
Statute of Limitations in Wisconsin
Under Wis. Stat. 893.55(1m), a medical malpractice action must be brought by the later of two dates: three years from the date of the injury, or one year from the date the injury was discovered or, in the exercise of reasonable diligence, should have been discovered. This two-track structure gives patients a discovery option when an injury is not immediately apparent.
That discovery date can be disputed, so have a Wisconsin medical malpractice lawyer pin down your deadline in a free consultation as soon as malpractice is suspected (attorney advertising).
Statute of Repose: The 5-Year Outer Limit
Wisconsin pairs the discovery rule with a hard backstop. Under Wis. Stat. 893.55(1m)(b), an action brought under the discovery branch may not be commenced more than five years from the date of the act or omission. This five-year period operates as an absolute outer deadline for most claims.
Two narrow exceptions extend that limit. Wis. Stat. 893.55(2) allows an extra year from discovery when a provider conceals the act or omission, and Wis. Stat. 893.55(3) allows one year from when a patient is aware, or with reasonable care should be aware, of a foreign object left in the body with no therapeutic purpose.
Exceptions for Minors
Wisconsin provides a separate rule for children under Wis. Stat. 893.56. A person under 18 who is not otherwise under a disability must bring a medical malpractice action within the period set by Wis. Stat. 893.55, or by the time the person reaches age 10, whichever is later.
This means very young children effectively receive a tolled deadline, while the standard limitation period governs older minors. The interplay of these dates is fact-specific.
Damage Caps in Wisconsin: $750,000, Upheld in Mayo
Wisconsin caps noneconomic damages, such as pain and suffering, at $750,000 per occurrence in medical malpractice cases for occurrences on or after April 6, 2006, under Wis. Stat. 893.55(4)(d). Economic damages, such as medical bills and lost earnings, are not subject to this cap.
The cap has a contested history. In Ferdon ex rel. Petrucelli v. Wisconsin Patients Compensation Fund, 2005 WI 125, the Wisconsin Supreme Court struck down an earlier cap (roughly $350,000 with inflation adjustments) as a violation of equal protection under the Wisconsin Constitution. The Legislature then enacted the $750,000 figure, and in Ascaris Mayo v. Wisconsin Injured Patients and Families Compensation Fund, 2018 WI 78, the Wisconsin Supreme Court upheld the $750,000 cap as constitutional and expressly overruled Ferdon. The $750,000 noneconomic cap is therefore the current law. That is the figure our Wisconsin settlement calculator is built around for a standard injury claim.
The Injured Patients and Families Compensation Fund
Wisconsin operates a state-administered Injured Patients and Families Compensation Fund under Wis. Stat. ch. 655. Health care providers must carry mandatory primary malpractice insurance up to a statutory threshold, and the Fund pays the portion of a qualifying claim that exceeds that primary layer.
The Fund was created under Wis. Stat. 655.27 to help finance provider liability for malpractice claims and to provide excess coverage above the primary limit. In practice, the Fund is often a party in larger Wisconsin malpractice cases because it is the source that pays the high-value portion of an award.
Pre-Suit Mediation Requirement
Wisconsin does not require a certificate or affidavit of merit before filing. Instead, the state requires a request for mediation under Wis. Stat. ch. 655, subchapter VI. Under Wis. Stat. 655.44, a claimant generally must file a request for mediation before commencing a court action, and no court action may be commenced until the mediation period has run.
A claimant may also file the mediation request within a short window after filing suit under a related provision. Filing the request tolls the applicable statute of limitations until 30 days after the mediation period ends, so the mediation step is built into the deadline analysis.
Standard of Care, Liable Parties, and Expert Testimony
A Wisconsin malpractice plaintiff must show that the provider departed from the standard of care of a reasonable provider in the same circumstances and that the departure caused the injury. Physicians, nurses, hospitals, and other health care providers covered by Wis. Stat. ch. 655 can be defendants, and hospitals may be liable for the conduct of their employees.
Because these questions turn on medical judgment, qualified expert testimony is generally required to establish both the standard of care and causation. The narrow exception is a case so obvious that a layperson could recognize the negligence, such as a foreign object left in the body.
Comparative Negligence in Wisconsin
Wisconsin follows modified comparative negligence under Wis. Stat. 895.045. A patient's recovery is reduced by the patient's percentage of fault, and a patient whose negligence is greater than the negligence of the provider being sued recovers nothing.
In practice, a patient who is 50% or less at fault can still recover a reduced amount, while a patient who is 51% or more at fault is barred. A defense argument that the patient ignored medical instructions or delayed follow-up care can reduce or eliminate recovery.
Wrongful-Death Medical Malpractice
When alleged malpractice causes death, a claim may be brought under Wis. Stat. 895.04 by the personal representative or the person entitled to recovery, following the statutory order of beneficiaries (such as a surviving spouse and minor children). The medical malpractice timing framework in Wis. Stat. 893.55 governs when the claim must be filed.
Wrongful-death noneconomic damages are subject to their own limits rather than the $750,000 general cap. Under Wis. Stat. 895.04(4), wrongful-death noneconomic damages are limited to $500,000 for a deceased minor and $350,000 for a deceased adult, and Wis. Stat. 893.55(4)(f) applies that limit in a malpractice wrongful-death action.
How to Evaluate and Preserve a Possible Claim
If you suspect malpractice in Wisconsin, request and preserve complete medical records promptly and write down the timeline of events, because those dates drive the deadline and mediation analysis. The three-year and five-year limits are strict, and the mediation request must be factored in early.
Most Wisconsin medical malpractice attorneys offer a free initial consultation and work on a contingency-fee basis, meaning a fee is owed only if the case recovers money. No attorney can guarantee an outcome or a dollar amount; the value of any case depends on the specific facts, the evidence, the caps, and how a court applies the law. Consult a licensed Wisconsin attorney to evaluate the specific facts and deadlines in your situation.
Frequently Asked Questions
What is the deadline to sue for medical malpractice in Wisconsin?
Generally the later of three years from the date of injury or one year from when the injury was or should have been discovered, under Wis. Stat. 893.55, with an absolute five-year outer limit from the act or omission on the discovery branch. Deadlines are fact-specific, so consult a licensed Wisconsin attorney quickly.
Does Wisconsin cap medical malpractice damages?
Yes. Wisconsin caps noneconomic damages at $750,000 per occurrence under Wis. Stat. 893.55(4)(d). The Wisconsin Supreme Court upheld that cap in Mayo v. Wisconsin Injured Patients and Families Compensation Fund (2018), overruling the earlier Ferdon decision. Economic damages are not capped.
Do I need an expert affidavit to file in Wisconsin?
No. Wisconsin does not require a certificate or affidavit of merit. It does require a request for mediation under Wis. Stat. ch. 655 before or shortly after filing suit, and expert testimony is generally needed at trial to prove the standard of care.
What is the Injured Patients and Families Compensation Fund?
It is a state-administered fund under Wis. Stat. ch. 655 that pays the portion of a qualifying malpractice claim that exceeds a provider's primary insurance limit. The Fund, created by Wis. Stat. 655.27, is often a party in larger Wisconsin malpractice cases.
What is the statute of repose in Wisconsin?
For the discovery branch, Wis. Stat. 893.55(1m)(b) bars suit more than five years after the act or omission. Narrow exceptions apply for concealment and for foreign objects left in the body.
How does comparative fault affect a Wisconsin case?
Wisconsin uses modified comparative negligence under Wis. Stat. 895.045. Your recovery is reduced by your share of fault, and if your negligence is greater than the provider's, you recover nothing.
What is the deadline for a wrongful-death medical malpractice claim in Wisconsin?
A wrongful-death claim is brought under Wis. Stat. 895.04, with timing governed by the Wis. Stat. 893.55 medical malpractice framework. Wrongful-death noneconomic damages are limited to $500,000 for a deceased minor and $350,000 for a deceased adult. A licensed attorney can confirm the deadline for a specific case.
How much is a Wisconsin medical malpractice case worth?
There is no set figure, and no one can promise a value. Noneconomic damages are capped at $750,000, while economic damages are not capped, and recovery depends on the specific facts, evidence, and comparative fault. A licensed Wisconsin attorney can assess the facts after reviewing the records.
Updates
Independently fact-checked against the cited primary sources; governing law re-checked for recent changes
Governing law re-checked for recent changes
Reviewed and approved by an editor
The Law Behind This Article
This article rests on the statutory provisions below, held in our own legal record and retrieved from the official source. Tap a section to read the operative text.
Wisconsin Statutes, Chapter 893: Limitations Of Commencement Of Actions And Proceedings; Procedure For Claims Against Governmental Units
§ 893.55Medical malpractice; limitation of actions; limitation of damages; itemization of damages.In forcecited in 3 of our articles
(1d) (a) The objective of the treatment of this section is to ensure affordable and accessible health care for all of the citizens of Wisconsin while providing adequate compensation to the victims of medical malpractice. Achieving this objective requires a balancing of many interests. Based upon documentary evidence, testimony received at legislative hearings, and other relevant information, the legislature finds that a limitation on the amount of noneconomic damages recoverable by a claimant or plaintiff for acts or omissions of a health care provider, together with mandatory liability coverage for health care providers and mandatory participation in the injured patients and families compensation fund by health care providers, while compensating victims of medical malpractice in appropriate circumstances by the availability of unlimited economic damages, ensures that these objectives are achieved. Establishing a limitation on noneconomic damage awards accomplishes the objective by doing all of the following: 1.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at docs.legis.wisconsin.gov
Cited in 95 court opinions in our collectionLatest citing opinion in our collection: 2025
Opinions citing this section in our collection:
- Paul v. Skemp (Wisconsin Supreme Court 2001, 242 Wis. 2d 507)“…ions for medical *514 malpractice claims in Wis. Stat. § 893.55 (1995-96) 1 bars this act…”
- Aicher Ex Rel. LaBarge v. Wisconsin Patients Compensation Fund (Wisconsin Supreme Court 2000, 237 Wis. 2d 99)“…tion to dismiss and then sought summary judgment, invoking Wis. Stat. §§ 893.55 (1)(b) [2] and 893.56. [3] Section 89…”
- Phelps v. Physicians Insurance (Wisconsin Supreme Court 2009, 319 Wis. 2d 1)“…f a health care provider subject to Wis. Stat. ch. 655 and Wis. Stat. § 893.55 (4) (1997-98); 3 and *9 (2) whether G…”
Identified automatically from the court opinions citing this section — not a ranking of which case controls.
Also relied on in: Wisconsin Medical Recording Laws: Patient Rights, HIPAA, and Consent (2026), Wisconsin Statute of Limitations: Filing Deadlines by Case Type
§ 893.56Health care providers; minors actions.In force
Any person under the age of 18, who is not under disability by reason of insanity, developmental disability or imprisonment, shall bring an action to recover damages for injuries to the person arising from any treatment or operation performed by, or for any omission by a health care provider within the time limitation under s. 893.55 or by the time that person reaches the age of 10 years, whichever is later. That action shall be brought by the parent, guardian or other person having custody of the minor within the time limit set forth in this section. Judicial Council Committee’s Note, 1979: This section is previous s. 893.235 renumbered for more logical placement in restructured ch. 893. [Bill 326-A]
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at docs.legis.wisconsin.gov
Cited in 4 court opinions in our collectionLatest citing opinion in our collection: 2005
Opinions citing this section in our collection:
- Aicher Ex Rel. LaBarge v. Wisconsin Patients Compensation Fund (Wisconsin Supreme Court 2000, 237 Wis. 2d 99)“…ted to preclude this suit. Under the broader provisions of Wis. Stat. § 893.56 , Aicher would have had to file the mal…”
- Storm Ex Rel. Smoler v. Legion Insurance (Wisconsin Supreme Court 2003, 265 Wis. 2d 169)“…pecific statute for medical malpractice actions by minors. Wis. Stat. § 893.56 . The grammatical structure of subsecti…”
- Haferman v. St. Clare Healthcare Foundation, Inc. (Wisconsin Supreme Court 2005, 286 Wis. 2d 621)“…case is troubling given that the legislature has, through Wis. Stat. § 893.56 , provided more time for young children…”
Identified automatically from the court opinions citing this section — not a ranking of which case controls.
Wisconsin Statutes, Chapter 655: Health Care Liability And Injured Patients And Families Compensation
§ 655.44Request for mediation prior to court action.In force
(1) Request and fee. Beginning September 1, 1986, any person listed in s. 655.007 having a claim or a derivative claim under this chapter for bodily injury or death because of a tort or breach of contract based on professional services rendered or that should have been rendered by a health care provider may file a request for mediation and shall pay the fee under s. 655.54. (2) Content of request. The request for mediation shall be in writing and shall include all of the following information: (a) The claimant’s name and city, village or town, county and state of residence. (b) The name of the patient. (c) The name and address of the health care provider alleged to have been negligent in treating the patient. (d) The condition or disease for which the health care provider was treating the patient when the alleged negligence occurred and the dates of treatment. (e) A brief description of the injury alleged to have been caused by the health care provider’s negligence. (3) Delivery or registered mail. The request for mediation shall be delivered in person or sent by registered mail to the director of state courts. (4) Statute of limitations.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at docs.legis.wisconsin.gov
Cited in 15 court opinions in our collectionLatest citing opinion in our collection: 2025
Opinions citing this section in our collection:
- Landis v. Physicians Insurance Co. of Wisconsin, Inc. (Wisconsin Supreme Court 2001, 245 Wis. 2d 1)“…sagreed, concluding that the mediation process mandated by Wis. Stat. § 655.44 , in particular the tolling provision i…”
- Ocasio v. Froedtert Memorial Lutheran Hospital (Wisconsin Supreme Court 2002, 254 Wis. 2d 367)“…missal is mandated for noncompliance with the provision in Wis. Stat. § 655.44 (5) (1999-2000) [1] requiring a medica…”
- Young v. Aurora Medical Center of Washington County, Inc. (Court of Appeals of Wisconsin 2004, 272 Wis. 2d 300)“…In addition, they argued that the statute was tolled under Wis. Stat. § 655.44 (4) 4 from the date of their mediation…”
Identified automatically from the court opinions citing this section — not a ranking of which case controls.
§ 655.27Injured patients and families compensation fund.In force
(1) Fund. There is created an injured patients and families compensation fund for the purpose of paying that portion of a medical malpractice claim which is in excess of the limits expressed in s. 655.23 (4) or the maximum liability limit for which the health care provider is insured, whichever limit is greater, paying future medical expense payments under s. 655.015, and paying claims under sub. (1m). The fund shall provide occurrence coverage for claims against health care providers that have complied with this chapter, and against employees of those health care providers, and for reasonable and necessary expenses incurred in payment of claims and fund administrative expenses. The coverage provided by the fund shall begin July 1, 1975. The fund shall not be liable for damages for injury or death caused by an intentional crime, as defined under s. 939.12, committed by a health care provider or an employee of a health care provider, whether or not the criminal conduct is the basis for a medical malpractice claim. (1m) Peer review activities. (a) The fund shall pay that portion of a claim described in par. (b) against a health care provider that exceeds the limit expressed in s.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at docs.legis.wisconsin.gov
Cited in 36 court opinions in our collectionLatest citing opinion in our collection: 2025
Opinions citing this section in our collection:
- Ascaris Mayo v. Wisconsin Injured Patients and Families Compensation Fund (Wisconsin Supreme Court 2018, 383 Wis. 2d 1)“…to participate in the Fund by paying annual assessments. Wis. Stat. § 655.27 (3)(a). ¶6 The combination of requir…”
- Wisconsin Medical Society, Inc. v. Morgan (Wisconsin Supreme Court 2010, 328 Wis. 2d 469)“…as no contractual property rights in the Fund. In enacting Wis. Stat. § 655.27 (6), the legislature chose to delete an…”
- Wisconsin Patients Compensation Fund v. Wisconsin Health Care Liability Insurance Plan (Wisconsin Supreme Court 1996, 200 Wis. 2d 599)“…re providers must also pay annual assessments to the Fund. Wis. Stat. § 655.27 (3). From these assessments the Fund pa…”
Identified automatically from the court opinions citing this section — not a ranking of which case controls.
Wisconsin Statutes, Chapter 895: Damages, Liability, And Miscellaneous Provisions Regarding Actions In Courts
§ 895.045Contributory negligence.In forcecited in 10 of our articles
(1) Comparative negligence. Contributory negligence does not bar recovery in an action by any person or the person’s legal representative to recover damages for negligence resulting in death or in injury to person or property, if that negligence was not greater than the negligence of the person against whom recovery is sought, but any damages allowed shall be diminished in the proportion to the amount of negligence attributed to the person recovering. The negligence of the plaintiff shall be measured separately against the negligence of each person found to be causally negligent. The liability of each person found to be causally negligent whose percentage of causal negligence is less than 51 percent is limited to the percentage of the total causal negligence attributed to that person. A person found to be causally negligent whose percentage of causal negligence is 51 percent or more shall be jointly and severally liable for the damages allowed. (2) Concerted action. Notwithstanding sub. (1), if 2 or more parties act in accordance with a common scheme or plan, those parties are jointly and severally liable for all damages resulting from that action, except as provided in s.
Official text (excerpt) · last checked 2026-09-15 · Read the full text in our law library · Verify at docs.legis.wisconsin.gov
Cited in 69 court opinions in our collectionLatest citing opinion in our collection: 2024
Opinions citing this section in our collection:
- Industrial Risk Insurers & Quad Graphics, Inc. v. American Engineering Testing, Inc. (Court of Appeals of Wisconsin 2009, 318 Wis. 2d 148)“…g to Leavitt, the policy reasons for the 1995 amendment to Wis. Stat. § 895.045 , which changed the common law on joint…”
- Richards v. Badger Mutual Insurance (Wisconsin Supreme Court 2008, 309 Wis. 2d 541)“…me or plan" that invokes joint and several liability under Wis. Stat. § 895.045 (2) (2005-06). [2] We affirm the court…”
- Fuchsgruber v. Custom Accessories, Inc. (Wisconsin Supreme Court 2001, 244 Wis. 2d 758)“…o the compara *763 tive negligence statute, Wis. Stat. § 895.045 (1) (1999-2000), 1 applies…”
Identified automatically from the court opinions citing this section — not a ranking of which case controls.
Also relied on in: Wisconsin Dog Bite Laws: Liability and Victim Rights, Wisconsin Hit and Run Laws: Penalties and What to Do, Personal Injury Settlement Amounts: What Injuries Are Worth
§ 895.04Plaintiff in wrongful death action.In forcecited in 4 of our articles
(1) An action for wrongful death may be brought by the personal representative of the deceased person or by the person to whom the amount recovered belongs. (2) If the deceased leaves surviving a spouse or domestic partner under ch. 770 and minor children under 18 years of age with whose support the deceased was legally charged, the court before whom the action is pending, or if no action is pending, any court of record, in recognition of the duty and responsibility of a parent to support minor children, shall determine the amount, if any, to be set aside for the protection of such children after considering the age of such children, the amount involved, the capacity and integrity of the surviving spouse or surviving domestic partner, and any other facts or information it may have or receive, and such amount may be impressed by creation of an appropriate lien in favor of such children or otherwise protected as circumstances may warrant, but such amount shall not be in excess of 50 percent of the net amount received after deduction of costs of collection.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at docs.legis.wisconsin.gov
Cited in 77 court opinions in our collectionLatest citing opinion in our collection: 2025
Opinions citing this section in our collection:
- Bartholomew v. Wisconsin Patients Compensation Fund & Compcare Health Services Insurance (Wisconsin Supreme Court 2006, 293 Wis. 2d 38)“…ee that Maurin's holding "that the wrongful death cap in Wis. Stat. § 895.04 (4) is the single cap to be applied glo…”
- Maurin v. Hall (Wisconsin Supreme Court 2004, 274 Wis. 2d 28)“…J. (concurring). ¶ 250. The constitutionality of Wis. Stat. § 895.04 (4) is jeopardized by the extreme inter…”
- Czapinski v. St. Francis Hospital, Inc. (Wisconsin Supreme Court 2000, 236 Wis. 2d 316)“…f claimants entitled to bring wrongful death actions under Wis. Stat. § 895.04 (4) 5 applicable to claims…”
Identified automatically from the court opinions citing this section — not a ranking of which case controls.
Also relied on in: Motorcycle Accident Laws in Wisconsin (2026): Deadlines, Truck Accident Laws in Wisconsin (2026): Deadlines & Liability, Wisconsin Wrongful Death Laws (2026): Deadlines & Who Sues
Sources and References
- Wis. Stat. 893.55 - Limitation of actions; medical malpractice (statute of limitations, 5-year repose, concealment and foreign-object rules, $750,000 noneconomic cap)(docs.legis.wisconsin.gov).gov
- Wis. Stat. 655.27 - Injured patients and families compensation fund (creation and purpose)(docs.legis.wisconsin.gov).gov
- Wis. Stat. 655.44 - Request for mediation prior to court action (mandatory pre-suit mediation)(docs.legis.wisconsin.gov).gov
- Wis. Stat. 895.045 - Contributory negligence (modified comparative, 51% bar)(docs.legis.wisconsin.gov).gov
- Wis. Stat. 895.04 - Plaintiff in wrongful death action (claimants and wrongful-death noneconomic limits)(docs.legis.wisconsin.gov).gov
- Wis. Stat. 893.56 - Health care providers; minors actions (minor exception)(docs.legis.wisconsin.gov).gov
- Ascaris Mayo v. Wisconsin Injured Patients and Families Compensation Fund, 2018 WI 78 - Wisconsin Supreme Court (upheld $750,000 cap, overruled Ferdon)(wicourts.gov).gov
- Ferdon ex rel. Petrucelli v. Wisconsin Patients Compensation Fund, 2005 WI 125 - Wisconsin Supreme Court (earlier cap struck down on equal-protection grounds)(wicourts.gov).gov
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