Winning a Misdiagnosed Cancer Malpractice Case in NY

You must prove four elements: a doctor-patient relationship existed, the physician deviated from accepted medical standards in New York, that deviation directly caused your harm, and you suffered measurable damages as a result. Expert medical testimony is required in virtually every case — a qualified physician must attest that the diagnosis fell below the standard of care. Proving causation is often the hardest part: you must show that an earlier, correct diagnosis would have meaningfully improved your prognosis or treatment options.

Under CPLR §214-a, New York imposes a 2.5-year statute of limitations on medical malpractice claims, running from the date of the negligent act or the end of continuous treatment by the same provider for the same condition. The continuous treatment doctrine can extend your window if you continued seeing the same doctor who made the misdiagnosis. Missing this deadline almost always bars your claim entirely, so consulting an attorney early is critical.

Cases with clear liability — such as a missed biopsy, overlooked imaging findings, or failure to follow up on abnormal lab results — are more likely to result in a favorable settlement before trial. The stage at which cancer was eventually diagnosed, the difference in treatment intensity and prognosis, and the strength of the expert testimony all significantly influence settlement negotiations. New York juries can be unpredictable in medical malpractice cases, which is one reason defendants often prefer to settle strong cases rather than risk a verdict.

Yes. Under CPLR §3012-a, New York requires a certificate of merit to be filed with your medical malpractice complaint. Filing it within 90 days after service of the complaint is only allowed as an exception, where the statute of limitations would otherwise expire before your attorney can complete the required physician consultation. The certificate must state that your attorney has consulted with at least one licensed physician who reviewed the facts and concluded there is a reasonable basis for the claim. Failure to file it can result in dismissal of your case, making it essential to retain an attorney who handles this requirement from the outset.