Medical Malpractice Deadlines
in Ohio

The one-year statute of limitations: R.C. § 2305.113(A)

Ohio Revised Code § 2305.113(A) establishes a one-year statute of limitations for medical malpractice claims. This is not one year from the date of the medical procedure — it is one year from the date you discovered or should have discovered the injury and its connection to the medical treatment. This distinction is the “discovery rule,” and it is the most litigated timing issue in Ohio medical malpractice law.

The discovery rule exists because many forms of malpractice are not immediately apparent. A misdiagnosis may not become obvious until the condition worsens. A retained surgical instrument may not cause symptoms for months or years. A failure to diagnose cancer may not be discovered until the cancer has advanced to a later stage. In these situations, the one-year clock does not begin until the patient has actual or constructive knowledge of the injury.

“Constructive knowledge” means what you should have known through reasonable diligence. If a reasonable person in your circumstances would have investigated further — for example, by seeking a second medical opinion when symptoms persisted — the court may determine that the clock started running before you actually confirmed the malpractice. Ohio courts evaluate this on a case-by-case basis, considering the patient’s age, medical sophistication, and the nature of the symptoms.

The four-year statute of repose: the absolute deadline

Separate from the one-year statute of limitations, Ohio imposes a four-year statute of repose under R.C. § 2305.113(C). The repose period begins on the date of the act or omission constituting the alleged malpractice — not the date of discovery. It is an absolute outer boundary.

The practical effect is that even if you did not and could not have discovered the malpractice within four years of the procedure, your claim is time-barred. The statute of repose exists to provide finality for healthcare providers and is not subject to the discovery rule. Ohio courts have consistently upheld the repose period against constitutional challenges, affirming that the legislature has the power to impose an absolute cutoff.

Understanding how the statute of limitations and statute of repose interact is critical. The one-year limitation period can begin and expire entirely within the four-year repose window. But the repose period can also cut off a claim before the limitation period has even started — if the patient has not yet discovered the malpractice by the four-year mark, the claim is extinguished regardless.

Exceptions and tolling provisions

Ohio law provides several narrow exceptions to the standard malpractice deadlines. Each has specific requirements that must be proven by the plaintiff:

Minors

Under R.C. § 2305.16, if the patient was a minor at the time of the malpractice, the one-year statute of limitations is tolled until the minor reaches age 18. The minor then has one year from their 18th birthday to file. For children under age six at the time of the negligent act, the four-year repose period extends to the child’s sixth birthday if that date falls after the normal repose deadline. This exception is particularly relevant in birth injury cases, where the malpractice occurs at or before delivery and the child may not be diagnosed with conditions like cerebral palsy until years later.

Foreign objects retained in the body

When a healthcare provider leaves a foreign object inside a patient’s body — a surgical sponge, clamp, guide wire, or other instrument — the one-year statute of limitations runs from the date the patient discovers or should have discovered the object. This exception to the repose period recognizes that retained objects may not cause symptoms for years and that the patient could not reasonably have discovered the error sooner. However, the patient must still act within one year of actual or constructive discovery.

Fraudulent concealment

If the healthcare provider actively concealed the malpractice — for example, by altering medical records, misleading the patient about what occurred during treatment, or destroying evidence — Ohio courts may toll the statute of repose. The concealment must be active and intentional, not merely a failure to volunteer information. Courts distinguish between a provider who lies about a surgical complication (active concealment) and a provider who simply does not mention it (passive non-disclosure). The former may toll the repose; the latter generally does not.

Mental incompetency

Under Ohio’s general tolling provisions in R.C. § 2305.16, if the patient is mentally incompetent at the time the cause of action accrues, the statute of limitations may be tolled for the duration of the incompetency. The patient must be adjudicated incompetent or demonstrably unable to manage their own affairs. This tolling does not apply to the statute of repose, which continues to run regardless of the patient’s mental status unless one of the specific exceptions in R.C. § 2305.113 applies.

Wrongful death: a separate two-year clock

When medical malpractice results in a patient’s death, Ohio provides a separate filing deadline under R.C. § 2125.02. The personal representative of the deceased patient’s estate has two years from the date of death to file a wrongful death action. This is different from the one-year medical malpractice statute and the four-year repose period, though all three deadlines may be relevant in the same case.

The wrongful death clock runs independently, but the underlying malpractice must still fall within the four-year repose period. If the negligent act occurred more than four years before the patient’s death, the wrongful death claim may be barred by the malpractice repose period even though the two-year wrongful death deadline has not expired. These overlapping deadlines make wrongful death malpractice cases particularly time-sensitive.

How the 180-day notice letter works

Ohio law also provides a mechanism to extend the statute of limitations when additional time is needed for pre-suit investigation. Under R.C. § 2305.113(B)(1), a plaintiff may send a written notice letter to the prospective defendant before the statute of limitations expires. Sending this letter tolls the statute of limitations for 180 days from the date the letter is sent.

This 180-day extension is critical in malpractice cases because obtaining and reviewing medical records, consulting with experts, and preparing the required affidavit of merit takes time — often more than the one-year limitation period allows. Mike uses the 180-day notice letter strategically in every case where the deadline is approaching before the expert review is complete.

The notice letter must be sent by certified mail to the prospective defendant and must describe the basis of the claim in general terms. Failure to send the letter properly — wrong address, wrong method of service, insufficient description — can invalidate the tolling. Mike ensures every notice letter is sent in strict compliance with the statutory requirements.

Continuing course of treatment doctrine

Ohio recognizes the continuing course of treatment doctrine, which can affect when the statute of limitations begins to run. Under this doctrine, when a physician continues to treat a patient for the same condition that was the subject of the malpractice, the statute may not begin until the treatment relationship ends. The rationale is that a patient should not be forced to sue their own treating physician while still under that physician’s care.

Ohio courts apply this doctrine cautiously. The treatment must be ongoing, not merely follow-up visits for an unrelated condition. And the patient must not have actual knowledge of the malpractice during the treatment period — if the patient knows or should know about the error, the clock starts regardless of whether treatment is continuing. Mike evaluates every case for continuing treatment issues that may extend the available filing window.