A misdiagnosis can change your life. You go to the hospital with symptoms, the doctors misidentify the problem, and you’re sent home with the wrong treatment—or no treatment. Days or weeks later, you realize something is still wrong. The original condition has worsened. You seek a second opinion and finally get the correct diagnosis, but by then, the delay has caused real harm.

The question that naturally follows is: can you sue? In New York, the answer is yes—but with significant requirements. Medical malpractice law is complex, and misdiagnosis cases require proving specific elements to succeed. Understanding what you need to prove, how hospitals can be held liable, and what damages are available helps you understand whether you have a viable claim.

The Elements of Medical Malpractice

In New York, to sue for medical malpractice—including misdiagnosis—you must prove four elements.

A Duty of Care

The healthcare provider (doctor, hospital, or both) had a professional duty to provide you with proper medical care. This is almost always established simply by showing that the provider treated you or was responsible for your care.

Breach of That Duty

The provider failed to meet the standard of care expected of a reasonably competent healthcare provider in similar circumstances. This is where misdiagnosis claims focus. Did the doctor conduct an appropriate examination? Were tests ordered that should have been ordered? Were diagnostic findings missed that a competent doctor would have caught?

The standard isn’t perfection. Doctors are human and diagnoses are sometimes difficult. The standard is what a reasonably competent doctor would have done in the same situation.

Causation

The breach caused injury to you. You must show that the misdiagnosis directly led to harm. If you were misdiagnosed with condition A when you actually had condition B, and the delay in proper diagnosis caused condition B to worsen, that’s causation. If you would have suffered the same harm regardless of the diagnosis, there’s no causation.

Damages

You suffered quantifiable harm: medical expenses, lost wages, pain and suffering, or permanent injury. Without damages, there’s no case.

Hospital Liability for Misdiagnosis

A critical question is whether you can sue the hospital itself or only the individual doctor. In New York, you can often sue both, under different legal theories.

Direct Liability

Hospitals have a direct duty to patients. They must ensure that medical staff are qualified, that equipment works properly, that infection control measures are followed, and that procedures are safe. If a hospital’s own negligence causes misdiagnosis—like a hospital that fails to maintain diagnostic equipment, ensuring it produces inaccurate results—the hospital is directly liable.

Hospital hiring and credentialing decisions also matter. If a hospital hired a doctor with a history of poor diagnoses without adequate investigation, that’s direct hospital negligence.

Vicarious Liability

In many cases, the doctor treating you is employed by the hospital. Under vicarious liability, the hospital is responsible for the doctor’s negligence. You don’t have to prove the hospital itself was negligent; you only have to prove the doctor was negligent and that the doctor was the hospital’s employee or agent.

However, if the doctor was independent (a private physician admitting patients to the hospital), vicarious liability doesn’t apply. You’d need to prove direct hospital negligence instead.

Misdiagnosis and Diagnostic Standards

Misdiagnosis cases hinge on what the standard of care required in your specific situation. Courts in New York examine whether the doctor’s diagnostic process met professional standards.

Appropriate Examination and Testing

Did the doctor perform an adequate physical examination? Did they take a thorough history? Were tests ordered that should have been ordered given your symptoms?

If a patient comes in with severe chest pain and shortness of breath, a competent doctor orders an EKG and cardiac workup. If the doctor doesn’t, that’s likely a breach. If a patient presents with symptoms consistent with appendicitis, imaging studies should be ordered. Failure to order appropriate tests can establish breach.

Misread Tests

Sometimes tests are ordered and performed correctly, but the results are misinterpreted. A radiologist might miss a tumor on imaging. A lab technician might report results incorrectly. A doctor might read test results but fail to appreciate their significance.

These misinterpretations can constitute malpractice if a reasonably competent professional would not have made the same error.

Alternative Diagnoses Not Considered

Part of the diagnostic process is considering differential diagnoses—possible conditions that match the patient’s symptoms. If a doctor diagnoses one condition without adequately considering others that fit the presentation, that can be malpractice.

For example, chest pain could be a heart attack, anxiety, muscle strain, or acid reflux. A competent doctor considers the full range of possibilities and doesn’t dismiss serious alternatives without adequate reason.

The Statute of Limitations in New York

In New York, the statute of limitations for medical malpractice is 2.5 years from the date you discovered the malpractice or should have discovered it. This is much shorter than for other types of personal injury (typically three years).

However, there’s an important exception: if the malpractice was discovered because of the injury (like a foreign object left inside you discovered during surgery), the statute starts when you discover it, not when the malpractice occurred.

The statute can also be tolled (paused) if you were a minor when the malpractice occurred. A minor has until age 19 to file suit.

Given this tight timeline, if you suspect medical malpractice, consulting an attorney quickly is essential.

The Certificate of Merit Requirement

New York law requires that before you file a medical malpractice suit, your attorney must obtain a certificate of merit. This certificate comes from a qualified healthcare provider who reviews your case and confirms that there’s a reasonable basis to believe malpractice occurred.

This isn’t a guarantee you’ll win—it’s just confirmation that a healthcare provider in the relevant field believes your claim has merit. The certificate is filed with the court and is essential to proceeding with the case.

Obtaining a certificate takes time and costs money (typically several hundred dollars). It also delays filing suit. However, it’s required by law and protects both the healthcare provider (from frivolous suits) and the court (from overloaded dockets).

What Damages Are Available

If you prove medical malpractice by misdiagnosis, what can you recover?

Economic Damages

These are concrete, quantifiable losses: medical expenses incurred due to the misdiagnosis, lost wages while you were treated or recovered, and costs of ongoing care if the misdiagnosis caused permanent injury. These are relatively straightforward to calculate.

Non-Economic Damages

These are subjective but real: pain and suffering, emotional distress, loss of enjoyment of life, and permanent scarring or disfigurement. New York allows recovery for these damages, though courts vary in how much they award.

Punitive Damages

In rare cases where the healthcare provider’s conduct was grossly negligent or intentionally harmful, punitive damages are possible. These are uncommon in medical malpractice cases but can be awarded to punish particularly egregious behavior and deter similar conduct.

Common Misdiagnosis Scenarios

Certain misdiagnoses appear frequently in malpractice litigation.

Heart Attack Missed in Emergency Department

A patient presents with chest pain, shortness of breath, or arm pain. The doctor diagnoses anxiety, acid reflux, or musculoskeletal pain and sends the patient home. The patient later suffers a heart attack. Failure to order cardiac testing when heart attack was in the differential is malpractice.

Cancer Missed on Imaging

A radiologist reviews imaging (X-ray, CT, MRI) and fails to identify a tumor that was present. This can occur because the radiologist didn’t look carefully, didn’t understand the imaging, or missed an abnormality that should have been obvious. Misread imaging is a common malpractice claim.

Stroke Missed in Emergency Department

A patient presents with stroke symptoms (facial drooping, arm weakness, speech difficulty). The doctor attributes symptoms to something else and doesn’t order imaging or perform stroke protocols. When the real stroke is finally diagnosed hours later, treatment options are lost.

Appendicitis Missed, Leading to Perforation

A patient with abdominal pain is diagnosed with gastroenteritis or food poisoning. Appendicitis isn’t diagnosed until the appendix ruptures, causing peritonitis and sepsis—much more serious and life-threatening than a simple appendectomy would have been.

Why Medical Malpractice Cases Are Complex

Medical malpractice cases are challenging because they require detailed expert analysis. You need a healthcare provider—someone with training and experience in the relevant field—to review your case and testify about the standard of care.

This is different from other personal injury cases. A car accident is straightforward: the other driver hit you. Medical malpractice requires proving what a competent doctor would have done and showing that the actual doctor fell short.

Healthcare providers also have significant protections under New York law. Insurance companies defend them vigorously. Doctors testify that their diagnosis, while incorrect, was reasonable under the circumstances.

Our Approach to Misdiagnosis Claims

When we evaluate misdiagnosis claims, we start with thorough investigation. We obtain all medical records. We review them carefully to understand what happened, when it happened, and what the consequences were.

We consult with qualified healthcare providers who review the case and provide their professional opinion. We ask: what was the standard of care? Did the defendant meet that standard? If not, how did that deviation cause harm?

We build a strong case supported by expert testimony. We explain the medical issues in plain language. We demonstrate the harm you’ve suffered and quantify your damages.

Importantly, we work on contingency. You don’t pay us unless we recover for you. That means we only take cases we believe in and can win.

The Law Offices of Thomas J. Lavin Fight for Misdiagnosis Victims

If you’ve been harmed by a misdiagnosis in New York—in Bronx, Westchester County, or elsewhere—we’re here to help. You don’t pay unless we win. Contact us at 718-957-8695 to discuss your case and your options.