A death caused by medical negligence triggers not one body of Missouri law but two. Your family's case is a wrongful death claim, and it is also a medical malpractice claim. Each brings its own deadlines, its own proof rules, and its own traps. Miss one requirement from either side and the case can end before a jury ever hears it.

This guide walks through both sets of rules in plain English: who may sue, how long you have, the expert affidavit your lawyer must file within 90 days, what your family can recover, and how the defense will fight back. It is written for spouses, parents, and children in St. Louis and across Missouri who suspect that a doctor, nurse, or hospital caused a death that should not have happened.

One Lawsuit, Two Sets of Missouri Rules

A wrongful death claim is the legal vehicle. Under § 537.080, when a person dies from conduct that would have supported a lawsuit had they lived, the liable party remains liable to the family. Medical malpractice is the engine inside that vehicle — the claim that a health care provider's negligence caused the death.

Missouri fused these two tracks in 2015. Section 538.210 abolished the old common-law malpractice action and replaced it with a statutory one. To win, your family must prove two things: the provider failed to use the skill and care that members of the same profession ordinarily use in similar circumstances, and that failure directly caused or contributed to the death.

The practical consequence: your case must satisfy every procedural rule in Chapter 538 (the malpractice statutes) and every standing and damages rule in the wrongful death act (§§ 537.080–537.100). A lawyer handling these cases works both checklists at once.

Who May File — and Why Missouri Allows Only One Lawsuit

Not every grieving relative can sue. Section 537.080 ranks family members in classes, and the highest class with a living member controls the claim:

First class: the surviving spouse, the children (or a deceased child's descendants), and the deceased's father or mother. Many families are surprised to learn that parents stand in the first class alongside a spouse and children.
Second class: brothers and sisters, or their descendants — but only if no one in the first class survives.
Last resort: a plaintiff ad litem, a person the court appoints to sue for whoever is entitled to share in the recovery.

Two rules protect defendants from being sued twice, and both can hurt an unwary family. First, only one wrongful death action may be brought against any one defendant for the same death. Second, the malpractice statute treats everyone claiming under § 537.080 as a single plaintiff. If one relative files alone and settles, the others lose their claims against that defendant. Identify every eligible family member at the start. Our companion guide on who can file a wrongful death claim in Missouri covers the classes in more detail.

You Usually Have Three Years — but Act on the Shortest Clock

The wrongful death statute, § 537.100, gives your family three years. Missouri courts measure that period from the date of death, not the date of the negligent treatment.

The malpractice statute, § 516.105, sets a shorter two-year period for actions against health care providers, running from the act of neglect. When a patient dies quickly after the negligence, the three-year wrongful death period controls the family's case. But when death follows the negligence by many months — a missed cancer diagnosis that takes two years to become fatal, for example — the defense will argue the two-year clock bars part or all of the claim. These fights turn on specific facts.

Section 516.105 also contains exceptions that can extend the two-year period:

A foreign object left in the body. If a surgeon leaves a sponge or instrument inside the patient, the two years run from when the negligence was discovered, or should have been discovered with ordinary care.
Failure to share test results. If the negligence is a failure to inform the patient of medical test results, the two years run from discovery of that failure.
Injured children. A minor harmed by malpractice generally has until age 20 to sue.
An absolute outer limit. No malpractice action may be brought more than ten years after the act of neglect, whatever the exception.

Do not count on an exception. Treat the earliest plausible deadline as the real one, and get a lawyer reviewing the records months before it arrives.

The Affidavit of Merit: Your Case's 90-Day Gate

Missouri makes your family prove the case has merit before it truly begins. Under § 538.225, within 90 days after filing the petition, your lawyer must file an affidavit swearing that a legally qualified health care provider has given a written opinion: the defendant failed to use reasonable care, and that failure directly caused or contributed to the death. The court may grant one extension of up to 90 more days for good cause.

"Legally qualified" has teeth. The supporting provider must hold a license in the same profession as the defendant and must actively practice — or have retired within the last five years from practicing — substantially the same specialty. An affidavit about a surgeon's conduct needs a surgeon. Your lawyer must file a separate affidavit for each defendant, stating each supporting provider's name, address, and qualifications.

Fail to file, and the court must dismiss the case against any defendant who asks — without prejudice, meaning you may refile if time remains. But refiling burns the limitations clock, and a family that files near a deadline may get no second chance. The Missouri Supreme Court upheld this system in Giudicy v. Mercy Hospitals East Communities, 645 S.W.3d 492 (Mo. banc 2022), and it had already rejected a constitutional attack on the 90-day deadline in Mahoney v. Doerhoff Surgical Services, 807 S.W.2d 503 (Mo. banc 1991). Courts enforce the affidavit requirement strictly.

What Your Family Can Recover

Under § 537.090, the judge or jury awards what they find "fair and just" for the death. The statute tells them to weigh the family's financial losses, funeral expenses, and the value of what your loved one gave every day: services, companionship, comfort, instruction, guidance, counsel, training, and support.

Three features of this statute deserve your attention:

Your loved one's own suffering counts. The jury may award what the deceased endured between the injury and the death — the pain, fear, and treatment they experienced while alive. Missouri folds this into the single wrongful death action; your family does not file a separate survival claim.
Grief itself is not compensable. The statute expressly bars damages for grief and bereavement. Recovery centers on the relationship's tangible and intangible value, not the family's sorrow.
Caregiving and children carry presumptions. Say your loved one did not hold a full-time job but provided at least half the care for a child, a disabled person, or an adult over 65. The law then presumes that care was worth 110 percent of the state average weekly wage. If the deceased was under 18, the law presumes the family's annual financial loss from the parents' income.

Economic losses — the income your loved one would have earned, the household work they performed, the final medical bills, the funeral costs — have no statutory cap. A forensic economist typically proves lost earnings from tax records, career trajectory, and work-life expectancy, and those figures often drive the largest part of the recovery. Our guide to wrongful death damages in Missouri explains the categories in depth.

The Cap on Noneconomic Damages — and the Fight Behind It

Noneconomic damages compensate for losses money cannot truly replace: companionship, guidance, comfort, support. Missouri caps them in malpractice cases. Under § 538.210, the cap for a death case starts at $700,000, and it applies "irrespective of the number of defendants" — one pool per death, no matter how many providers share fault. Because all wrongful death claimants count as one plaintiff, the family shares that single pool rather than drawing one cap per relative.

The cap rises 1.7 percent every January 1. The director of the Department of Commerce and Insurance calculates the new figure each year, and the Secretary of State publishes it in the Missouri Register, so the number in force when your case resolves will exceed the statutory baseline. The jury never hears about the cap; the court applies it after the verdict.

The cap survived a constitutional war. In Watts v. Lester E. Cox Medical Centers, 376 S.W.3d 633 (Mo. banc 2012), the Missouri Supreme Court struck down an earlier cap as applied to common-law negligence claims, holding that it violated the right to trial by jury. But the same court had already ruled the other way for wrongful death in Sanders v. Ahmed, 364 S.W.3d 195 (Mo. banc 2012): because wrongful death exists only by statute, the legislature may limit what it created. The 2015 statute then made all malpractice claims statutory, and the cap has governed malpractice death cases since. Punitive damages remain theoretically available, but § 538.210 allows them only on clear and convincing proof of intentional or malicious conduct — a bar few malpractice cases clear.

Proving Malpractice Caused the Death

Expert testimony carries these cases. Missouri jurors cannot be expected to know what an anesthesiologist should monitor or when an emergency physician must order a CT scan, so qualified experts must explain it. Your family's expert must establish three points:

The standard of care — what a reasonably careful provider in the same specialty would have done in the same situation.
The breach — how the defendant fell short of that standard.
Causation — that the shortfall directly caused or contributed to the death, stated to a reasonable degree of medical certainty.

Causation is where these cases are won and lost. Patients who die during treatment often had serious underlying illness, and the defense will argue the disease — not the provider — killed the patient. Your expert must explain, with the records as support, why timely competent care would likely have saved your loved one. A trial judge acts as gatekeeper under RSMo 490.065 and can exclude an expert whose methods are unreliable. If the surviving expert testimony does not cover every element, the court can direct a verdict for the defense before the jury ever deliberates.

How the Defense Fights Back

Expect the defense to blame the patient. Missouri follows pure comparative fault under RSMo 537.765: the jury assigns percentages of responsibility, and the award shrinks by whatever share it pins on your loved one. If the jury values the case at $1,000,000 but finds the patient 30 percent at fault, the family recovers $700,000.

The common attacks are predictable. The defense claims the patient ignored discharge instructions, skipped follow-up appointments, hid medical history or medications, delayed returning when symptoms worsened, or refused a recommended test. Missouri's pure rule means even a large fault share never wipes out the claim entirely — a family recovers something even if the patient bears most of the fault — but every percentage point costs real money. Candid preparation with your lawyer about your loved one's medical history is the only way to blunt these arguments.

What to Do in the First Weeks After a Suspected Malpractice Death

Grief makes paperwork feel impossible. These steps, taken early, protect your family's rights while you mourn:

Request the complete medical records from every provider and facility that treated your loved one — hospitals, specialists, primary care, urgent care, and the pharmacy. You have a legal right to them, and records secured early cannot be lost or altered.
Write a timeline while memories are fresh. Note symptoms, dates, conversations with staff, and who said what. Contemporaneous notes outweigh recollections reconstructed years later in a deposition.
Keep every bill and explanation of benefits. Final medical expenses and funeral costs are recoverable, and the paper trail proves them.
Sign nothing and give no recorded statements. Hospitals and insurers sometimes seek releases or quick settlements within days of a death. Let a lawyer read any document first.
Consult a malpractice attorney promptly. The 90-day affidavit clock starts when the petition is filed, and expert review takes weeks. Early consultation gives your lawyer time to find a qualified expert, evaluate causation honestly, and file well inside every deadline.

Frequently Asked Questions

How long do I have to file a wrongful death malpractice lawsuit in Missouri?

The wrongful death statute, § 537.100, allows three years from the date of death. The malpractice statute, § 516.105, allows two years from the negligent act and can complicate cases where death came long after the treatment. Because the interaction is fact-specific, treat the earliest plausible date as your deadline and speak with a lawyer right away.

Who can file the lawsuit if my parent died from medical negligence?

Under § 537.080, the first class includes the surviving spouse, the children, and the deceased's own parents. Siblings may sue only if no one in that first class survives. If no eligible family member exists or acts, the court can appoint a plaintiff ad litem. Only one action may be brought against each defendant, so all eligible family members should be identified before anyone files.

What is the affidavit of merit, and what happens if we miss it?

Section 538.225 requires your lawyer to file, within 90 days of the petition, an affidavit confirming that a qualified provider in the defendant's own profession has opined in writing that negligent care caused or contributed to the death. Miss the deadline — even with one available 90-day extension — and the court must dismiss against any defendant who moves. The dismissal is without prejudice, but the statute of limitations keeps running.

Is there a cap on what our family can recover?

Only on noneconomic damages. Under § 538.210, a malpractice death case starts with a $700,000 cap on noneconomic losses such as companionship and guidance, adjusted upward each January, and the whole family shares that one cap regardless of how many defendants are sued. Economic damages — lost income, household services, medical bills, funeral costs — are not capped.

Can the hospital blame my loved one for their own death?

They can try, and often do. Under RSMo 537.765, Missouri's pure comparative fault rule reduces your family's recovery by whatever percentage of fault the jury assigns to the deceased — for skipping follow-ups or withholding history, for example. The claim is never barred outright, no matter how high that percentage goes.

Disclaimer: This article is for informational purposes only and does not constitute legal advice, and reading it creates no attorney-client relationship. Every case is different, and deadlines and outcomes depend on facts no article can capture. If you suspect medical negligence caused a death in your family, consult a qualified Missouri attorney about your specific situation.

If you lost a family member to suspected medical negligence, call Ott Law Firm at (314) 710-2740 for a free consultation. We will review the records, give you a candid assessment, and explain your family's options.

Wrongful Death from Medical Malpractice in Missouri: What Families Need to Know