Failure to Diagnose Stroke in New York: When a Missed Stroke Is Malpractice

Last updated: October 22, 2026

A missed or delayed stroke diagnosis is medical malpractice in New York when an emergency doctor, nurse or radiologist failed to recognize stroke warning signs a careful provider would have caught, and the delay closed the window for clot-busting drugs or thrombectomy and caused brain damage or death. A failure to diagnose stroke attorney proves this with ER timestamps, imaging and expert testimony. Most New York claims must be filed within 2 years and 6 months of the malpractice (CPLR 214-a). Public hospital and wrongful death claims have shorter deadlines, and New Jersey, Pennsylvania and Connecticut have their own rules.

This guide from the medical malpractice attorneys at Kramer, Dillof, Livingston & Moore (KDLM) explains how strokes get missed, when failing to diagnose a stroke is malpractice, what compensation may be available, and the deadlines that apply. It is general information, not legal advice about your case.

What are the symptoms of a stroke that doctors should not miss?

The classic warning signs of a stroke come on suddenly, and emergency staff are trained to check for them with a structured stroke scale.

The American Stroke Association teaches the F.A.S.T. warning signs: face drooping, arm weakness, speech difficulty, and time to call 911. Other symptoms of stroke include sudden numbness on one side, vision loss, severe dizziness, loss of balance, confusion and a sudden severe headache.

Different types of stroke need different care. The two main ones are:

• Ischemic stroke: occurs when a blood clot blocks a blood vessel in the brain and cuts off oxygen to an area of the brain.
• Hemorrhagic stroke: occurs when an artery ruptures and bleeds into or around the brain, sometimes from an aneurysm.

The outcome: whether it is an ischemic or hemorrhagic stroke, sudden neurologic symptoms are a medical condition that calls for urgent evaluation, not a wait-and-see approach.

Can a stroke be missed in the ER?

Yes. Stroke is the condition most often linked to serious harm from medical error in diagnosis in the United States, and many of these misses happen in the emergency room.

A 2024 Johns Hopkins-led study in BMJ Quality & Safety estimated that stroke is missed in about 17.5% of cases and was the top cause of serious harm from diagnostic error, with roughly 94,000 serious harms each year (Newman-Toker et al., BMJ Quality & Safety, 2024;33:109-120, published online July 2023). Common patterns in ER visits where a stroke is missed include:

• Dizziness or vertigo blamed on an inner ear problem without a proper neurologic exam.
• Headache, confusion, or slurred speech attributed to migraine, intoxication, or low blood sugar.
• Younger patients sent home because a stroke “seemed unlikely,” even when risk factors for stroke such as high blood pressure or diabetes were present.
• A transient ischemic attack (TIA), or mini-stroke, treated as resolved with no urgent workup.
• Symptoms that improve before imaging, so staff stop looking even though a stroke may still be underway.

The outcome for stroke patients: these misses are not rare events. They are patterns that a careful emergency physician is trained to look for.

Can a CT scan miss a stroke?

Yes. A standard non-contrast CT scan is very good at finding bleeding in the brain, but it often looks normal in the first hours after an ischemic stroke occurs.

That is why a normal CT does not rule out a stroke. Depending on the symptoms, a doctor may need to order CT angiography to look for a blocked blood vessel, or magnetic resonance imaging (MRI), which is more sensitive for early ischemia. A neurology consult and repeat exams also matter when symptoms come and go.

The outcome: one normal CT is not always enough. When a hospital discharges a patient with ongoing stroke symptoms anyway, that decision can be the center of a malpractice case.

Why does a delay in diagnosing a stroke cause so much harm?

A late diagnosis causes harm because the best stroke treatment only works within a limited time, and brain tissue is lost every minute blood flow is blocked.

According to the CDC, patients who reach the emergency room within 3 hours of their first symptoms often have less disability 3 months after a stroke than those whose care is delayed (CDC Stroke Facts). The CDC also reports that more than 795,000 people in the United States have a stroke each year and that about 87% are ischemic.

The main time-sensitive ways to treat a stroke are:

• Thrombolytic medication (thrombolysis): a standard part of the treatment of acute stroke, given to eligible patients within hours of symptom onset. A failure to treat an eligible patient with it can be the basis of a claim.
• Mechanical thrombectomy: a procedure to remove a large blockage, available for selected patients, often at a comprehensive stroke center.
• Bleeding control: for a brain bleed, fast diagnosis guides blood pressure control, reversal of blood thinners, and neurosurgery.

New York State’s Department of Health designates hospitals as stroke centers so that patients can be routed quickly. When doctors fail to diagnose and treat in time, the patient may lose access to that care, and stroke survivors can be left with permanent paralysis, speech loss or cognitive problems. Others die from a condition that could have been treated.

When is a missed stroke a medical malpractice case in New York?

A missed or delayed stroke diagnosis is medical malpractice in New York when a medical professional failed to meet the accepted standard of care and that negligence caused a worse outcome.

To bring a medical malpractice claim, the evidence usually has to show:

• A departure from accepted practice: for example, no stroke scale or neurologic exam, no CT angiography or MRI when symptoms called for it, a misread scan, or a failure to timely call in the neurology team.
• Causation: that timely care would likely have reduced the damage. New York courts often ask whether the delay took away a substantial possibility of a better outcome.
• Damages: the injuries, costs and losses that followed.

Proving these points takes medical records, imaging, nursing notes and timestamps, and testimony from an expert witness such as an emergency physician, an experienced stroke neurologist or a neuroradiologist. Before filing, New York also requires an attorney to certify that a physician has reviewed the case (CPLR 3012-a).

The outcome: not every bad result is medical negligence, but when a known warning sign was ignored and the treatment window closed, a stroke lawsuit may be justified depending on the circumstances.

What compensation is available in stroke malpractice cases?

Stroke misdiagnosis compensation in New York can include both economic and non-economic damages, and New York does not cap damages in malpractice claims.

• Medical expenses: hospital care, rehabilitation, therapy and medication.
• Future care: home health aides, assistive devices, home changes and long-term care, often set out in a life care plan.
• Lost earnings: past and future income when the injury ends or limits a career.
• Pain and suffering: physical pain, disability and loss of enjoyment of life.
• Wrongful death: if a patient dies, the estate’s personal representative may recover the family’s financial losses under New York’s wrongful death law (EPTL 5-4.1 and 5-4.3).

Every case is different, and no attorney can honestly promise a result. The value depends on what the patient suffered as a result, the strength of the medical evidence, and who is responsible.

How long do you have to file a stroke misdiagnosis claim in New York?

In most New York cases, you have 2 years and 6 months from the date of the malpractice, or from the last treatment if continuous treatment applies, to file a lawsuit (CPLR 214-a).

Shorter limits can apply. Claims against public hospitals, such as NYC Health + Hospitals, generally require a notice of claim within 90 days, and the lawsuit generally must be started within 1 year and 90 days. A wrongful death action generally must be filed within 2 years of death. The discovery rule in Lavern’s Law applies only to missed cancer, so the clock usually starts on the date of the error. Read more in our guide to the New York medical malpractice statute of limitations.

The outcome: speak with a medical malpractice lawyer as soon as the medical situation allows. Gathering emergency room records, scan files and timestamps takes time.

What are the deadlines and rules in NY, NJ, PA and CT?

Strokes are often treated at the nearest hospital, which may be across a state line. KDLM handles cases in New York, New Jersey, Pennsylvania and Connecticut, and each state sets its own deadlines and filing rules. This is a general summary of the law as of October 22, 2026, not legal advice. Exceptions can shorten or extend these periods, so have a lawyer confirm the dates for your case.

New York

• Deadline: 2 years and 6 months from the malpractice, or from the last treatment if you kept treating with the same provider for the same condition (CPLR 214-a). Missed cancer: 2 years and 6 months from when you knew or should have known of the error and the harm, but no more than 7 years from the error (Lavern’s Law). Foreign object left in the body: 1 year from discovery.
• Children: the clock is paused until age 18, but a malpractice claim can’t be extended more than 10 years past the malpractice (CPLR 208).
• Merit rule: the lawyer files a certificate of merit with the complaint after consulting a physician (CPLR 3012-a).
• Wrongful death: 2 years from death (EPTL 5-4.1); damages are limited to financial losses (EPTL 5-4.3).
• Damages and fault: no cap on malpractice damages. A patient’s own share of fault reduces the award but doesn’t bar it (CPLR 1411).
• Public hospitals: notice of claim generally within 90 days, and suit within 1 year and 90 days (General Municipal Law 50-e and 50-i; NYC Health + Hospitals).

New Jersey

• Deadline: 2 years (N.J.S.A. 2A:14-2). Courts apply a discovery rule, so the clock can start when you knew or should have known of the injury and its likely cause.
• Children: injuries at birth must be filed before the child’s 13th birthday (N.J.S.A. 2A:14-2). For other injuries, the clock is generally paused until age 18 (N.J.S.A. 2A:14-21).
• Merit rule: an affidavit of merit from an appropriate licensed professional is due within 60 days after the defendant answers. A court can allow one extra period of up to 60 days (N.J.S.A. 2A:53A-27).
• Wrongful death: 2 years from death (N.J.S.A. 2A:31-3).
• Damages and fault: no general cap, but a nonprofit hospital’s liability is capped at $250,000 (N.J.S.A. 2A:53A-8). A patient whose fault is greater than the defendants’ recovers nothing (N.J.S.A. 2A:15-5.1).
• Public hospitals: Tort Claims Act notice within 90 days. Suit can be filed after 6 months and within 2 years (N.J.S.A. 59:8-8).

Pennsylvania

• Deadline: 2 years (42 Pa.C.S. 5524), with a court-made discovery rule. The 7-year outer limit in the MCARE Act was struck down by the Pennsylvania Supreme Court in Yanakos v. UPMC (2019).
• Children: the clock is paused until age 18, and then the normal 2 years runs (42 Pa.C.S. 5533(b)).
• Merit rule: a certificate of merit for each licensed professional is filed with the complaint or within 60 days after it (Pa.R.C.P. 1042.3).
• Wrongful death: wrongful death and survival claims based on malpractice must be filed within 2 years of death, unless the cause of death was misrepresented or concealed (40 P.S. 1303.513(d)).
• Damages and fault: no cap on compensatory damages. Punitive damages against an individual doctor are generally limited to 200% of compensatory damages (40 P.S. 1303.505). A patient whose fault is greater than the defendant’s recovers nothing (42 Pa.C.S. 7102).
• Public hospitals: written notice to the government unit within 6 months (42 Pa.C.S. 5522). Damages against Commonwealth parties are capped at $250,000 per plaintiff (42 Pa.C.S. 8528), and against local agencies at $500,000 in total (42 Pa.C.S. 8553).

Connecticut

• Deadline: 2 years from when the injury was sustained or discovered (or should have been), and never more than 3 years from the act or omission (C.G.S. 52-584). Continuing-treatment and continuing-conduct doctrines can pause the clock. An automatic 90-day extension is available by petition (C.G.S. 52-190a(b)).
• Children: the malpractice statute has no general extension for minors, so the same limits usually apply to a child’s claim.
• Merit rule: the complaint must include a good-faith certificate and a written, signed opinion from a similar health care provider. Without the opinion letter, the case can be dismissed (C.G.S. 52-190a).
• Wrongful death: 2 years from death, and no more than 5 years from the act or omission (C.G.S. 52-555).
• Damages and fault: no cap on malpractice damages. A patient whose fault is greater than the defendants’ combined fault recovers nothing (C.G.S. 52-572h).
• State hospitals: claims against the state generally have to be presented within 1 year, and never more than 3 years from the act (C.G.S. 4-148). A malpractice suit can be filed directly within that period with a good-faith certificate (C.G.S. 4-160(f)).

The outcome: if your care happened outside New York, the deadline may be shorter, and the merit paperwork is different. Ask early so nothing is missed.

Why work with a New York delayed stroke diagnosis lawyer at KDLM?

A stroke misdiagnosis lawyer needs to understand neurology, hospital protocols and how to present complex evidence at trial. Failure-to-diagnose stroke lawyers who try cases also have more leverage in settlement talks. Stroke malpractice claims often turn on minutes recorded in the chart, so experience in malpractice litigation matters.

KDLM is a Manhattan law firm of medical malpractice and personal injury attorneys at 217 Broadway. Its verdicts and settlements include missed diagnosis cases, such as a $108 million verdict in a case involving undiagnosed meningitis, and the firm reports more than 150 verdicts over $1 million. You can read a recap of some of our missed diagnosis cases. Past results do not guarantee a similar outcome.

Contact us for a free consultation with a stroke misdiagnosis attorney

KDLM represents stroke victims and their families in New York City, Long Island and throughout the state, and also handles cases in New Jersey, Pennsylvania and Connecticut. We work on a contingency fee: no fee unless we win. To learn how we handle a failure to diagnose lawsuit, call (212) 618-6800. The consultation is free.

Related: missed aneurysm cases | cancer misdiagnosis settlements

Frequently asked questions

Can I sue a hospital for misdiagnosing a stroke?

Yes, if a failure to diagnose or treat the stroke properly by hospital staff caused harm. A hospital can be responsible for its employees, such as emergency physicians, nurses and radiologists. Claims against public hospitals in New York usually require a notice of claim within 90 days and a lawsuit within 1 year and 90 days.

How long do I have to sue for a missed stroke in New York?

Generally, 2 years and 6 months from the malpractice, or from the end of continuous treatment (CPLR 214-a). Claims against public hospitals usually need a notice of claim within 90 days and a lawsuit within 1 year and 90 days, and a wrongful death action generally must be filed within 2 years of death. Lavern’s Law’s discovery rule applies only to missed cancer, not stroke.

How much compensation can I get for a stroke misdiagnosis?

There is no set amount. Compensation depends on the severity of the brain injury, future care needs, lost income, and the strength of the evidence. New York has no damages cap, and KDLM does not promise outcomes.

Is every stroke misdiagnosis case medical malpractice?

No. Some strokes are hard to detect even with good care. It is malpractice when a careful provider would have recognized the stroke, for example by doing a proper neurologic exam or ordering the right imaging, and earlier treatment would likely have helped.

What if my loved one died after a stroke was missed?

If a loved one suffered a stroke that was missed and died, the estate’s personal representative (usually a family member) brings the wrongful death claim on behalf of the family under EPTL 5-4.1, generally within 2 years of death. It can include financial losses and the patient’s conscious pain and suffering before death. A KDLM attorney can explain who can bring the claim.

Do you handle misdiagnosis of stroke cases in New Jersey or Connecticut?

Yes. KDLM is based in Manhattan and focuses on New York, and it also handles cases in New Jersey, Pennsylvania and Connecticut. Each state has its own deadlines and merit filing rules, summarized in the state-by-state section above, so contact us early.

Does the deadline differ outside New York?

Yes. New Jersey and Pennsylvania generally allow 2 years, and their courts apply a discovery rule. Connecticut allows 2 years from when the injury was or should have been discovered, but no more than 3 years from the error. Each state also has its own merit filing: a New Jersey affidavit of merit, a Pennsylvania certificate of merit, or a Connecticut opinion letter. Wrongful death deadlines and public-hospital notice rules also differ. KDLM handles cases in all four states, so contact us early to have your dates checked.