Wisconsin Medical Malpractice Laws

Wisconsin medical malpractice claims follow special rules under Chapter 655 of the Wisconsin Statutes and Wis. Stat. § 893.55. Most claims must be filed within 3 years of the injury, or 1 year from discovery, whichever is later, and a claim relying on discovery must be filed no more than 5 years after the act. Children, foreign objects and concealment follow different timing rules. Noneconomic damages are capped at $750,000.

If you're trying to understand whether a doctor's or hospital's mistake in Wisconsin gives you a claim, this guide explains the rules that will shape your case. It covers deadlines, mandatory mediation, experts, damages caps, fault, government providers and wrongful death. It is published by Gilman & Bedigian, the medical malpractice and birth injury trial firm co-founded by Charles Gilman and H. Briggs Bedigian in October of 2012. The firm won the $182 million birth injury verdict against the University of Pennsylvania (Hagans v. Hospital of the University of Pennsylvania), the largest medical malpractice verdict in Pennsylvania history.

If your baby was injured during labor or delivery in Wisconsin, call us at (800) 529-6162. Gilman & Bedigian handles birth injury cases nationwide and works with local counsel when required by the rules of a particular jurisdiction. We take all personal injury cases on a contingency fee basis, so there is no fee unless we win. For other medical malpractice in Wisconsin, consult a medical malpractice attorney licensed in Wisconsin about your specific case.

Key Takeaways

• Wisconsin gives most patients 3 years from the injury, or 1 year from discovery, to sue, with a limit of 5 years from the act on claims relying on discovery (Wis. Stat. § 893.55).
• A child injured by medical care, including at birth, generally has until the later of age 10 or the § 893.55 deadline (Wis. Stat. § 893.56).
• Noneconomic damages are capped at $750,000 per occurrence (Wis. Stat. § 893.55(4)(d)). The Wisconsin Supreme Court upheld that cap in 2018.
• A patient who is more than 50% at fault recovers nothing; at lower fault, a patient can recover only from a provider at least as much at fault as the patient, and the award is reduced proportionally (Wis. Stat. § 895.045).
• A mediation request through Wisconsin's medical mediation system is part of nearly every malpractice case (Wis. Stat. ch. 655, subch. VI).

What Counts as Medical Malpractice Under Wisconsin Law?

In Wisconsin, medical malpractice means a health care provider failed to use the degree of care, skill and judgment that a reasonable provider in the same field would use, and that failure caused injury. A bad outcome alone is not malpractice. The question is whether the care fell below the standard and whether that failure, rather than the underlying illness, caused the harm.

Standard of care is the level of care a reasonably careful provider with similar training would give in similar circumstances. It is measured against what the provider knew or should have known at the time, not with hindsight.

A Wisconsin malpractice claim generally requires four things:

1. A provider–patient relationship that created a duty of care
2. A breach of the standard of care
3. Causation linking the breach to the injury
4. Damages, such as medical bills, lost income or pain and suffering

Wisconsin channels most claims against covered providers through Chapter 655, the state's health care liability chapter. That chapter covers physicians, nurse anesthetists, hospitals and certain other providers and organizations. It also sets up the Injured Patients and Families Compensation Fund, which pays covered judgments above the provider's primary insurance (Wis. Stat. § 655.27). You can read more about how that fund has operated in our article on the Wisconsin medical malpractice fund surplus.

Common claim types include failure to diagnose cancer, stroke or sepsis; surgical and anesthesia errors; medication errors; emergency room mistakes; lack of informed consent; and birth injuries. The Agency for Healthcare Research and Quality (AHRQ) publishes patient safety research on many of these error types.

What Is the Wisconsin Medical Malpractice Statute of Limitations?

Under Wis. Stat. § 893.55(1m), an adult patient must file within 3 years from the date of the injury, or within 1 year from the date the injury was discovered (or reasonably should have been), whichever is later. That discovery extension can never push the filing past 5 years from the act or omission. Foreign objects and fraudulent concealment are the main exceptions.

How the 3-year and 1-year rules work together

The 3-year clock starts on the date of the injury, not with your diagnosis. If you didn't learn about the injury until later, the 1-year discovery rule may give you more time. You get whichever date is later, but the 1-year discovery period can't run past the 5-year limit.

What is the 5-year outer limit?

A statute of repose is an absolute outer deadline that runs from the date of the act, regardless of when the injury was discovered. Wisconsin's 5-year limit in § 893.55(1m)(b) works this way for adult patients. Wisconsin courts have upheld it even when a patient could not reasonably have discovered the harm sooner.

Hypothetical example: A patient has surgery on March 1, 2021. In June 2025, a new scan reveals that a nerve was cut during that operation. The 3-year period ended March 1, 2024. The 1-year discovery period would run to June 2026. The 5-year limit cuts that off at March 1, 2026, so that becomes the practical deadline. Mediation tolling, discussed below, can affect the exact date.

Exceptions for foreign objects and concealment

Two situations get extra time under § 893.55(2) and (3):

• Foreign objects. If an object with no medical purpose, such as a sponge, was left in your body, you may file within 1 year of discovering it, or within the regular § 893.55 period, whichever is later.
• Fraudulent concealment. If a provider concealed a prior act or omission from you, you may file within 1 year of discovering the concealment, or within the regular period, whichever is later.

Deadline problems end more malpractice cases than almost anything else. Our article on how statute of limitations complications can doom a medical malpractice case shows how this happens.

How Do Wisconsin Deadlines Apply to Birth Injury Claims?

Under Wis. Stat. § 893.56, a person injured by medical care before age 18 generally may file by the later of their 10th birthday or the deadline under § 893.55. For a baby injured at birth, that usually means the child's own claim can be filed up to the child's 10th birthday, even though the adult 5-year limit would otherwise have passed.

Here's what that means for families.

The child's claim versus the parents' claims

A birth injury often creates more than one claim. The child has a claim for their own pain, disability and lost future earning capacity. Parents may have separate claims, such as medical expenses during childhood and loss of the child's society and companionship.

These claims don't always share the same deadline. Families should not assume the child's age-10 rule protects every claim the parents might bring. Get each claim's deadline checked early.

Why waiting is still risky, even with more time

Many conditions linked to birth injuries, such as cerebral palsy or developmental delays, become clearer as a child grows. That's one reason the age-10 rule exists. Even so, delay has real costs:

• Fetal heart monitoring strips, nursing notes and staff schedules can be harder to track down years later.
• Witnesses move, retire or forget details.
• Experts need complete records to evaluate whether delivery decisions met the standard of care.

When a baby dies

When a birth injury is fatal, the family's claim becomes a wrongful death claim under Wis. Stat. § 895.03 and § 895.04. Wrongful death claims generally follow a 3-year period, but when the death results from medical care, the malpractice rules in Chapter 893 can control the timing. Don't rely on a general rule here. The specific facts change the answer.

Does Wisconsin Require Mediation or a Certificate of Merit Before Suing?

Wisconsin requires most medical malpractice claimants to request mediation through the state's medical mediation system, either before filing suit or within 15 days after filing (Wis. Stat. §§ 655.44, 655.445). Limited statutory exceptions exist. Wisconsin does not impose a separate affidavit- or certificate-of-merit filing at the start of a case the way some states do.

How the mediation system works

Wisconsin's mediation system is run under the director of state courts. A request for mediation is filed with a fee, and a mediation panel reviews the claim. The panel typically includes a lawyer, a health care provider and a member of the public.

The mediation period generally lasts 90 days (Wis. Stat. § 655.465). The panel's work is confidential, and mediation does not bind either side. If the case doesn't resolve, the claimant can proceed in circuit court.

How mediation affects your deadline

Tolling means pausing a legal deadline. Filing a request for mediation before suing tolls the statute of limitations for the mediation period and a short time afterward (Wis. Stat. § 655.44(4)). Filing the request properly matters. A procedural misstep can create a deadline problem that is hard to fix.

What about expert reports before filing?

Because Wisconsin has no certificate-of-merit requirement, a case can technically be filed before an expert has signed off. Practically, filing without solid expert support rarely makes sense. Experts are needed to prove the case, and the defense will test that support early.

What Expert Testimony Does a Wisconsin Malpractice Case Need?

Wisconsin malpractice cases almost always require expert testimony to establish the standard of care, how the provider breached it and how the breach caused the injury. Narrow exceptions exist when negligence is obvious to a layperson, such as surgery on the wrong body part.

Wisconsin's reliability standard

Wis. Stat. § 907.02 governs expert testimony. Since 2011, Wisconsin has applied a reliability standard modeled on the federal Daubert test.

Daubert refers to a framework that requires the judge to screen expert opinions. The judge asks whether the testimony rests on sufficient facts, uses reliable methods and applies those methods reliably to the case.

What this means for birth injury and complex cases

In a birth injury case, more than one expert is often needed. An obstetrician or nurse may address the standard of care during labor. A pediatric neurologist or neuroradiologist may address what caused the brain injury and when. A life care planner and economist may address future costs.

Causation is often where Wisconsin malpractice cases are won or lost. The defense may argue the injury came from a genetic condition, an infection or events before labor. Experts must explain, with reliable methods, why the medical care made the difference.

Is There a Wisconsin Medical Malpractice Damages Cap?

Yes. Wis. Stat. § 893.55(4)(d) caps noneconomic damages in medical malpractice cases at $750,000 per occurrence. Economic damages, such as medical expenses and lost earnings, are not capped.

Noneconomic damages compensate for losses that don't come with a receipt: pain, suffering, mental distress, disfigurement and loss of enjoyment of life.

The cap's history in Wisconsin courts

The cap has been challenged repeatedly. In 2017, a Wisconsin appeals court ruled the $750,000 cap unconstitutional, a decision we covered when it came out: Wisconsin appeals court rules $750,000 cap unconstitutional.

That ruling did not last. In 2018, the Wisconsin Supreme Court reversed it in Mayo v. Wisconsin Injured Patients and Families Compensation Fund, holding the cap constitutional. The $750,000 cap is the current law.

Why the cap matters less than people think in birth injury cases

This is one of the most misunderstood parts of Wisconsin law. The cap limits pain and suffering, not the cost of care. In many serious birth injury cases, the largest losses are economic: lifetime medical treatment, therapy, equipment, home modifications, attendant care and lost earning capacity. Those losses remain uncapped.

Wisconsin does handle large future medical awards differently. Under Wis. Stat. § 655.015, the portion of a future medical expense award above a statutory threshold is paid into an account and paid out as expenses are incurred, rather than in one lump sum.

Other damages rules to know

• Punitive damages require proof that the defendant acted maliciously or in intentional disregard of the patient's rights, and they are capped under Wis. Stat. § 895.043. See our overview of punitive damages in malpractice cases.
• Collateral sources, such as health insurance payments, may be admitted as evidence in Wisconsin malpractice cases under § 893.55(7).
• Wrongful death claims carry a separate cap on loss of society and companionship, discussed below.

For a broader view of how damages work, see the types of damages in a medical malpractice lawsuit. To compare Wisconsin with other states, see caps on medical malpractice damages by state.

How Does Comparative Fault Work in Wisconsin Malpractice Cases?

Wisconsin follows modified comparative negligence under Wis. Stat. § 895.045. A patient who is 51% or more at fault recovers nothing; a patient who is 50% or less at fault can recover only from a defendant whose share of fault is at least as large as the patient's, with damages reduced by the patient's share of fault.

In malpractice cases, defendants sometimes argue the patient contributed to the harm. Common examples include skipping follow-up appointments, not taking prescribed medication or withholding medical history.

But there's a catch. A patient's fault must actually contribute to the injury being claimed. A missed appointment months after a misread scan doesn't automatically excuse the misread.

When more than one provider is at fault

Under § 895.045(1), a defendant found 51% or more at fault is jointly and severally liable for the full award. A defendant found less than 51% at fault generally pays only its own percentage. This matters when a case involves several providers, such as an obstetrician, a nursing staff and a hospital.

What Changes When a Government Provider Is Involved?

Claims against government health care providers in Wisconsin can follow different rules than claims against private providers. The difference can affect deadlines, notice requirements and available damages.

State and local government providers

Wisconsin has separate statutes for claims involving state officers and employees (Wis. Stat. § 893.82) and local governmental units (Wis. Stat. § 893.80). These statutes contain notice and damages provisions, and some of their provisions treat medical malpractice claims differently than other claims. If care was provided at a county facility or by a state employee, have an attorney review which rules apply as soon as possible.

Federal providers

Care at a VA facility, such as the Clement J. Zablocki VA Medical Center in Milwaukee, falls under the Federal Tort Claims Act. So does care at a federally funded community health center whose staff are deemed federal employees under 42 U.S.C. § 233.

Federal claims require a written administrative claim to the agency within 2 years (28 U.S.C. § 2401(b)), and no lawsuit can be filed until that claim is denied or goes unanswered for 6 months (28 U.S.C. § 2675(a)). Wisconsin's longer rules for children do not extend the federal deadline. Many families don't know their clinic may be covered, so ask about this early.

How Does Wrongful Death Work After Medical Negligence in Wisconsin?

Under Wis. Stat. § 895.04, a wrongful death claim may be brought by the surviving spouse or domestic partner; if none, the children; if none, the parents; or by the personal representative of the estate on behalf of those family members. Losing someone because of a medical error is devastating, and these rules can feel cold. Knowing them helps families protect their rights.

Two different claims

A survival action carries forward the claim the patient would have had if they had lived, including their pain and suffering before death. A wrongful death action compensates the family for its own losses, such as lost support and companionship.

Chapter 655 limits on family claims

Wisconsin's malpractice chapter limits who may recover. Wisconsin courts have read Chapter 655 to exclude some family members from recovering loss of society in malpractice death cases, such as adult children of a deceased patient. This is a significant gap in Wisconsin law. Families in that situation should get a specific legal opinion rather than assume a claim does or doesn't exist.

The wrongful death cap on loss of society and companionship is $500,000 for a deceased minor and $350,000 for a deceased adult under § 895.04(4). How that cap interacts with the § 893.55 noneconomic cap in a malpractice death case is technical and fact-specific.

How Does a Wisconsin Medical Malpractice Claim Move Forward?

Most Wisconsin malpractice claims follow a predictable sequence. Each stage has its own rules, and timing errors at the start can end a case before it begins.

1. Request complete records. Under federal law (45 C.F.R. § 164.524), you have a right to copies of your records. Ask for the complete chart, including nursing notes, monitoring strips and imaging, not a summary.
2. Calculate every deadline. Identify the date of the act, the date of discovery, whether a child is involved and whether any provider is a government or federal provider.
3. Get an expert review. A qualified physician or nurse reviews the records to assess the standard of care and causation.
4. Request mediation. File through Wisconsin's medical mediation system, before suit or within 15 days after filing.
5. File in circuit court. If mediation doesn't resolve the claim, the case proceeds in the Wisconsin circuit court for the proper county.
6. Discovery. Both sides exchange records, take depositions and disclose experts. Expert reliability may be challenged under § 907.02.
7. Settlement or trial. Many cases resolve through negotiation. Others go to a jury.

Keep these steps in mind as you read the next section. The questions there are good ones to raise in any attorney consultation.

What Key Decisions and Common Mistakes Shape a Wisconsin Claim?

Decisions you'll face

• Whether to file a complaint with the licensing board. A complaint to the Wisconsin Department of Safety and Professional Services (which supports the Medical Examining Board) can lead to discipline. It does not compensate you and does not stop the lawsuit deadline.
• Whether to keep seeing the same provider. Your health comes first. Many people stay with their health system, and that doesn't waive a claim. Do keep copies of everything.
• Whether to talk with the hospital's risk management office. You're not required to give a recorded statement. Anything you say can be used to evaluate or defend the claim.

Mistakes to avoid

• Assuming the clock starts at diagnosis. The 3-year period runs from the date of the injury. For adults, discovery generally helps only within the 5-year limit, unless a provider concealed the error.
• Missing the federal track. A VA hospital, or a federally funded clinic whose staff are deemed federal employees, can mean a 2-year administrative claim, regardless of Wisconsin rules.
• Treating the age-10 rule as covering everyone. It protects the child's claim. Parents' claims may run on a different schedule.
• Assuming the cap makes a case not worth pursuing. Uncapped economic damages, especially lifetime care, often drive the value of serious cases.
• Relying on old information. Older articles may describe the 2017 appeals ruling against the cap without the 2018 reversal.

When Do You Need an Attorney, and What Does It Cost?

Medical malpractice is one area where handling a claim yourself is rarely realistic in Wisconsin. Expert testimony is required, mediation rules are technical and providers are defended by experienced insurance counsel. Smaller matters, such as a billing dispute or a complaint about bedside manner, may not need a lawyer at all.

How fees work

Most malpractice attorneys work on contingency, meaning they are paid a percentage of any recovery rather than by the hour. Wisconsin regulates contingency fees in medical malpractice cases under Wis. Stat. § 655.013, so ask any attorney exactly how the fee will be calculated. Also ask how case expenses, such as expert fees and mediation filing fees, are handled, because expenses are separate from attorney fees.

What affects timing

There is no reliable average timeline. The factors that matter most include:

• How long records collection and expert review take
• Whether mediation resolves the claim
• The number of defendants and experts
• Whether the injured person's condition, especially a child's, needs time to become clear
• The circuit court's schedule and any appeals

Neighboring states handle these issues differently. Compare the Minnesota medical malpractice laws or browse every state in our medical malpractice and birth injury laws by state guide.

The information on this page is for general informational purposes and does not constitute legal advice. Every case is different, and past results do not guarantee future outcomes. Contact a qualified attorney to discuss your specific situation.

Talk to us about a Wisconsin birth injury

If your child was harmed during pregnancy, labor or delivery in Wisconsin, the deadline rules above give you time, but records and evidence are easiest to gather now. Call Gilman & Bedigian at (800) 529-6162. We answer our phone 24/7. Our firm handles birth injury cases nationwide and works with local counsel when required by the rules of a particular jurisdiction, and we take all personal injury cases on a contingency fee basis, so there is no fee unless we win. For any other type of medical malpractice in Wisconsin, speak with a medical malpractice attorney licensed in Wisconsin about how these rules apply to your case.

Frequently Asked Questions

How long do I have to file a medical malpractice lawsuit in Wisconsin?

Under Wis. Stat. § 893.55, an adult generally has 3 years from the injury, or 1 year from discovering the injury, whichever is later. The discovery extension cannot go beyond 5 years from the act. Foreign object and concealment cases get additional discovery-based time, and children have until the later of age 10 or the § 893.55 deadline under § 893.56.

What is the deadline for a birth injury claim in Wisconsin?

Under Wis. Stat. § 893.56, a child injured by medical care, including at birth, generally may file by the later of their 10th birthday or the deadline in § 893.55. Parents' own claims, such as for medical expenses, may follow a different deadline. If the delivery took place at a federal facility, or a federally funded clinic whose staff are deemed federal employees, a 2-year federal administrative claim deadline generally applies instead.

How much does a medical malpractice attorney cost in Wisconsin?

Most malpractice attorneys work on a contingency fee, taking a percentage of any recovery instead of charging by the hour. Wisconsin regulates contingency fees in malpractice cases under Wis. Stat. § 655.013. Ask any attorney how the percentage is calculated and how case expenses, such as expert fees, are handled, since those are separate from the fee.

What is my Wisconsin medical malpractice case worth?

Value depends on the severity and permanence of the injury, uncapped economic losses such as lifetime care and lost earning capacity, and noneconomic damages, which Wisconsin caps at $750,000 under § 893.55(4)(d). Comparative fault can reduce an award. No one can responsibly value a case before the records and an expert review are complete.

Should I accept the insurance company's first offer?

In Wisconsin malpractice cases, early offers can come before the full extent of an injury is known, which is a particular concern with children whose conditions develop over time. Once you settle, you generally cannot reopen the claim. Before accepting any offer, make sure future medical needs and any lien obligations have been evaluated.

What if I was partially at fault for my injury?

Wisconsin's modified comparative negligence rule (Wis. Stat. § 895.045) bars recovery if you are 51% or more at fault. If you are 50% or less at fault, you can recover only from a defendant at least as much at fault as you, and your damages are reduced by your percentage. Your conduct must actually have contributed to the injury, so a provider's error is not excused simply because you made an unrelated mistake.

How long does a Wisconsin medical malpractice case take?

There is no reliable average. Wisconsin cases begin with records collection, expert review and a mediation period that generally lasts 90 days under § 655.465. After that, timing depends on discovery, the number of experts and defendants, the court's calendar and whether the case settles or goes to trial.

Do I need a lawyer for a medical malpractice claim in Wisconsin?

Wisconsin law does not require one, but malpractice claims almost always require expert testimony under Wis. Stat. § 907.02, and the mediation and deadline rules are technical. Providers are defended by experienced insurance counsel. Very small or non-injury complaints may be better handled through the provider or the licensing board.

What if the provider doesn't have enough insurance?

Wisconsin requires providers covered by Chapter 655 to carry primary malpractice coverage or qualify as self-insured (Wis. Stat. § 655.23). The Injured Patients and Families Compensation Fund pays covered amounts above that primary coverage (§ 655.27). Not every provider falls under Chapter 655, so coverage should be confirmed for each defendant.

Will my Wisconsin malpractice case go to trial?

Many cases resolve through mediation or settlement, but some go to a jury in the circuit court. Whether yours does depends on the strength of the evidence, the defendants' positions and your goals. Preparing a case as if it will be tried is generally how claimants keep their options open in negotiations.

How do I pay for treatment while my case is pending?

Most patients rely on health insurance, Medicaid or Medicare while a Wisconsin malpractice case is pending. Those payers may have reimbursement rights from any recovery, and those liens must be resolved before settlement funds are distributed. Wisconsin also allows evidence of collateral source payments in malpractice cases under § 893.55(7).

Is Wisconsin's $750,000 damages cap still in effect?

Yes. A Wisconsin appeals court struck down the noneconomic damages cap in 2017, but the Wisconsin Supreme Court reversed that decision in 2018 in Mayo v. Wisconsin Injured Patients and Families Compensation Fund. The $750,000 cap on noneconomic damages under § 893.55(4)(d) remains in force, while economic damages remain uncapped.