What Happened with the Mt. Sinai Data Incident?

Mt. Sinai used Facebook advertisements and installed a piece of code (called the Pixel) and a data tracking tool (called CAPI) on its websites. Users of these websites had no idea these devices had been keeping track of everything they did.

Potentially hundreds of patients like you may have had your medical information gathered and shared — without your knowledge.

The clients already in our class action lawsuit had no idea their private information was being passed on to Facebook. They had no idea their every keystroke or action on the website was being monitored.

Mt. Sinai may have passed along this patient info:

  • Appointment details.
  • Location of treatments.
  • Specific medical conditions.
  • Patient searches for doctors.
  • Patient locations.
  • Patient computer IP addresses.
  • Patient unique Facebook ID.

If you or a loved one was impacted by the Mount Sinai Meta pixel data breach, our team is here to help.

Contact Us Today for a Case Evaluation.

What Is the Definition of a Class Action Lawsuit?

Class action lawsuits involve a potentially large number of people all harmed in a similar way. Already, lawsuits have been filed against leading tech companies for allegedly breaking multiple privacy laws. A major complaint is “mass theft of personal information and violations of privacy, property, and consumer rights.” (1)

In another class action lawsuit, plaintiffs allege Zoom “invaded the privacy of millions of users by sharing personal data with Facebook, Google and LinkedIn.” Zoom agreed to pay $86 million to settle the suit. (2)

What Is the Difference Between a Lawsuit and a Class Action Lawsuit?

Many people ask about the difference between a lawsuit and a class action lawsuit. The answer is a lawsuit can be filed by any one individual harmed by a person, institution, or company. For example, if a person dies due to a doctor’s or hospital’s errors, family members can file a wrongful death lawsuit. However, there is another option when dozens of people have been harmed in the same way by the same institution, such as Mt. Sinai. In this situation, a class action lawsuit can expedite the litigation process and resolve multiple claims at the same time.

What to Do If You’re at Risk Due to Mt. Sinai?

Contact your insurance company if your personal medical information was compromised. Also reach out to all your health care providers. Also, contact your state government office that is responsible for overseeing patient medical care.

Contact an attorney at Weitz & Luxenberg. Our firm with experience handling class action lawsuits. This includes data privacy issue cases and data breaches.

Talking with an attorney you feel comfortable with — such as one of our attorneys who has handled cases involving the illegal sharing of people’s medical information — is a good way to find out about the legal process.

Learn more about the Mount Sinai Meta pixel lawsuit and how we can help if you or a loved one was impacted.

Get Your Free Case Evaluation

How Do I Start a Class Action Lawsuit Against Mt. Sinai?

In October 2023, Weitz & Luxenberg filed a class action lawsuit against Mt. Sinai Health System, Inc., for sharing patient private medical information illegally to a third party. Patients at any of Mt. Sinai’s Health System campuses may have had their medical information compromised.

Mt. Sinai’s health system consists of eight hospital campuses: Mount Sinai, Beth Israel, Mount Sinai Brooklyn, The Mount Sinai Hospital, Mount Sinai Queens, Mount Sinai Morningside, Mount Sinai West, New York Eye and Ear Infirmary of Mount Sinai, and Mount Sinai South Nassau. The lawsuit also involves six endoscopy centers, five ambulatory surgery centers, and two urgent care centers.

In our Meta pixel lawsuit, we claim Mt. Sinai’s illegal actions included:

  • Invasion of privacy.
  • Violation of confidentiality of patient private information.
  • Diminution of value of the private information.
  • Continued and ongoing risk to patient private information.
  • Statutory damages.

The Litigation Process

If Mt. Sinai compromised your personal information or that of a loved one in any way, consult with an experienced class action attorney regarding your legal options. This attorney should have considerable experience handling complex class action lawsuits. At W&L, our attorneys do. Not only do they have experience — they have success.

When you speak with your attorney, provide all the information about your situation as you can. Your attorney guides you through the process of joining our class action lawsuit.

Weitz & Luxenberg Is Here for You

Mt. Sinai violated patient trust. They tracked and shared your confidential medical information without your knowing it and without your agreement.

In June 2025, we won a settlement of $2.85 million from the University of Rochester Medical Center for this very situation. We would love the opportunity to do the same for you.

Weitz & Luxenberg is a national law firm standing up for regular people. Our experienced attorneys are prepared to pursue this class action lawsuit until we achieve a just resolution for our clients. We will not stop fighting until you and other victims have been duly compensated.

W&L has the resources to stand up to all offending parties — no matter how big they are or how much clout or money they have. For more information and a free consultation, we invite you to contact us by calling (917) LAWYERS or filling out the form on this page.