US-New YorkWhat is the discovery rule for medical malpractice statutes of limitation?
In New York, the discovery rule does not apply to medical malpractice claims — the statute of limitations starts running from the date of the alleged malpractice, not when the injury is discovered.
What the Law Says
New York law explicitly rejects the discovery rule for medical malpractice actions. Instead, the statute of limitations begins to run on the date of the alleged negligent act or omission — not when the injury is discovered or should have been discovered.
Under New York Civil Practice Law and Rules (CPLR) § 214-a, a medical malpractice claim must be commenced within two and one-half years from the date of the act, omission, or failure complained of.
This strict timing rule applies even if the patient did not know — and could not reasonably have known — about the injury or its cause until later. Unlike in some other states, New York courts have consistently held that the discovery rule is inapplicable to medical malpractice cases.
There are limited exceptions: for continuous treatment, the clock may be tolled until the end of the course of treatment related to the condition; and for foreign objects left in the body, CPLR 214-a provides a separate one-year-from-discovery deadline — but only for objects, not for misdiagnoses or surgical errors.
Statutory TextAn action for medical, dental or podiatric malpractice must be commenced within two years and six months of the act, omission or failure complained of...
— CPLR 214-a — Medical, dental or podiatric malpractice
What Courts Have Said
New York courts have repeatedly affirmed that the discovery rule does not extend the limitations period for medical malpractice claims.
Held that CPLR 214-a displaces the general discovery rule; the limitations period runs from the negligent act, not discovery of harm.
Reaffirmed that no discovery exception exists for delayed diagnosis cases — plaintiff’s lack of knowledge does not toll the 2.5-year deadline.
What to Do
File your medical malpractice lawsuit within 2 years and 6 months of the alleged negligent act or omission.
If treatment was ongoing, confirm whether the 'continuous treatment doctrine' may extend the deadline to 2.5 years after treatment ended for the same condition.
If a foreign object was left in your body, you have 1 year from the date of discovery — but this exception does not apply to other types of malpractice.
Consult an attorney immediately if you suspect malpractice — delays risk dismissal based on the statute of limitations.
If suing a public hospital or municipal provider, serve a Notice of Claim within 90 days (and file suit within 1 year and 90 days).
Sources
Not legal advice. This article is general information based on publicly available sources, written for educational purposes. Laws change and individual situations vary. Consult a licensed attorney in your jurisdiction before acting on anything you read here. Last reviewed: 2026-06-08.