Williams | Robinson | Wiggins

The filing deadline, the affidavit of merit requirement, and the caps on damages.

A claim that a doctor, nurse, hospital, or other health care provider caused harm through substandard care is not treated like an ordinary injury claim under Missouri law. Medical malpractice cases carry a shorter filing deadline, a mandatory expert certification that must be filed early in the case, and a statutory limit on certain damages that does not apply to most other injury claims. Missing any one of these requirements can end a claim before it is ever heard on the merits. Here is what a patient or family needs to know.

The filing deadline may be shorter than most people expect. Under § 516.105, RSMo, a medical malpractice action generally must be filed within two years of the date of the alleged act of neglect — not two years from when the harm was discovered, which can be a very different date. There is also an outer limit: no claim for leaving a foreign object in the body may be filed more than two years from the date of discovery, and never more than ten years after the act of neglect, regardless of when the harm was discovered. Medical neglect involving a foreign object left in the body, and a claim brought by a minor (discussed in the next sentence), are two of the few areas in which Missouri law recognizes a true statute of repose. A child's claim generally must be filed by the child's twentieth birthday, or within ten years of the act of neglect, whichever is later, subject to the statute's specific terms. Because the clock can start running well before anyone realizes something went wrong, it is important to talk to an attorney as soon as a potential case of medical negligence is suspected.

If the medical neglect caused the wrongful death of a family member, the statute of limitations under § 537.100, RSMo, is generally three years from the date of death, not the date of the alleged act of neglect. If the medical neglect involved a defective medical device — a hip replacement, for example — a different five-year product-liability statute of limitations under § 516.120, RSMo, may apply, running from when the injury is sustained and can reasonably be ascertained, which is not always the same as the date of implantation or device failure.

An affidavit of merit is required early in the case. Missouri requires a plaintiff to obtain, before filing or very shortly after, a written opinion from a "legally qualified health care provider" — one licensed in the same profession as the defendant, and either actively practicing or within five years of retirement from actively practicing substantially the same specialty. That provider's opinion must state that the defendant failed to use the degree of skill and learning a reasonably prudent and careful health care provider would have used under similar circumstances, and that the failure directly caused or contributed to cause the claimed damages. Under § 538.225, RSMo, an affidavit confirming this opinion has been obtained must be filed with the court no later than 90 days after the petition is filed, though a court may extend that deadline by up to another 90 days for good cause. Failing to timely file the affidavit results in dismissal of the claim without prejudice. A defendant may also ask the court to review the affidavit privately (in camera) within 180 days of filing, and if the court finds it doesn't meet the statute's requirements, the case proceeds to a hearing on whether there is probable cause for the claim to continue. If the court finds no probable cause, it dismisses the case and can require the plaintiff to pay the defendant's reasonable attorney fees and costs — a real financial risk that makes a properly prepared affidavit essential from the outset.

There is a statutory cap on noneconomic damages. Under § 538.210, RSMo, noneconomic damages — compensation for things like pain, suffering, and loss of enjoyment of life, as opposed to medical bills and lost income — are capped in claims against health care providers. For 2026, that cap is $481,494 per plaintiff in an ordinary personal injury case, regardless of the number of defendants. A higher cap of $842,614 applies to a "catastrophic personal injury" — a defined term covering three distinct categories: quadriplegia (the permanent loss of functional use of all four limbs), paraplegia (the permanent loss of functional use of two limbs), or the actual loss of two or more limbs; a brain injury causing permanent cognitive impairment that leaves the patient unable to independently perform basic daily activities such as eating, dressing, bathing, or walking; irreversible failure of a major organ system; or vision loss to a statutorily defined level of severity. That same higher cap also applies, separately, to a wrongful death claim against a health care provider. Both figures adjust upward by a fixed 1.7 percent each year. These caps apply only to noneconomic damages — they do not limit recovery of past and future medical expenses or lost income, and they do not apply outside the medical malpractice context. The cap framework has a notable legal history: an earlier version of the cap was struck down by the Missouri Supreme Court in 2012 (Watts v. Lester E. Cox Med. Ctrs., 376 S.W.3d 633 (Mo. banc 2012)) as unconstitutional for common-law negligence claims, and the legislature rewrote the statute in 2015 — converting medical negligence into a purely statutory cause of action — in the form that applies today; the Missouri Supreme Court upheld this statutory version against a further constitutional challenge in 2021 (Ordinola Velazquez v. University Physician Associates, 625 S.W.3d 445 (Mo. banc 2021)).

Medical neglect cases also break down the damages award differently than most injury cases. In an ordinary injury case, the jury is told about the plaintiff's past and future economic damages (such as medical expenses and lost income) and is also allowed to assess a reasonable amount for noneconomic damages (such as pain and suffering or loss of enjoyment of life), but the verdict form asks for only a single combined number. Under § 538.215, RSMo, a medical malpractice verdict form must instead itemize the award into five separate categories:

• Past economic damages
• Past noneconomic damages
• Future medical damages
• Future economic damages, excluding future medical damages
• Future noneconomic damages

Section 538.215 also requires the jury to express all future damages at present value, a calculation not addressed here but covered in other articles. The "future economic damages, excluding future medical damages" category usually consists of anticipated future wage loss or lost earning capacity. Although these categories are broken out separately on the verdict form, that state-law itemization does not by itself change how a recovery is taxed under federal law. Compensatory damages received on account of a personal physical injury — including future lost wages or earning capacity — are generally excluded from federal income tax under 26 U.S.C. § 104(a)(2), regardless of how the categories are itemized. The more common exceptions involve punitive damages, interest awarded on a judgment, and, in limited circumstances, previously deducted medical expenses — none of which is typical in an ordinary medical malpractice recovery. Because tax treatment can still turn on case-specific facts, this is worth confirming with current IRS guidance and your own accountant.

What a patient or family should do. If you believe a health care provider's negligence caused harm to you or a family member, three things matter most in the early going: preserving and requesting complete medical records as soon as possible, avoiding delay given how the statute of limitations is calculated, and involving an attorney early enough to arrange the required expert review well before any filing deadline. Because the affidavit of merit has to come from a qualified provider in substantially the same specialty as the defendant, and because that review takes time to arrange and complete properly, waiting until close to a deadline meaningfully narrows the options available.

Summary. Missouri medical malpractice claims move on a shorter and more technical track than most injury cases: a two-year filing deadline tied to the date of the negligent act, a mandatory affidavit of merit from a qualified health care provider due within 90 days of filing, and a statutory cap on noneconomic damages that depends on whether an injury qualifies as catastrophic. Each of these requirements can be case-ending if missed, which makes early legal advice especially important in a potential medical malpractice matter.

Did you know? The above information is presented by Williams | Robinson | Wiggins as a public service and to generally outline the law in a particular area. It is not provided and is not intended as legal advice tailored to you or to your unique situation. Every legal matter depends upon specific facts which an attorney hired by you must consider in forming legal opinions and advice.

Need more information? If you believe you or a family member has been harmed by medical negligence, you may contact us at(573) 341-2266 to obtain more detailed assistance.