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Got a notice from International Society for Heart and Lung Transplantation? Here’s what to do.

International Society for Heart and Lung Transplantation told the Massachusetts Attorney General that people’s information was exposed. If you got a letter, work through the steps below.

Your checklist

  1. 1

    Keep the letter

    Save the notice from International Society for Heart and Lung Transplantation and its envelope. The date you were told can matter for legal deadlines.

  2. 2

    Freeze your credit

    The filing does not list what was taken, so play it safe. A free freeze at Equifax, Experian and TransUnion stops new accounts being opened in your name.

  3. 3

    Change reused passwords

    Change any password you used with this company or reused elsewhere, and turn on two-factor sign-in.

  4. 4

    Get a free claim review

    Our legal team checks whether you can be paid for this breach. No fee unless you recover.

Step 4: free claim review

Tell us you got the International Society for Heart and Lung Transplantation notice. An attorney, not a call center, reads it and tells you plainly whether you have a claim.

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  • Reply within 24 hours

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About the International Society for Heart and Lung Transplantation breach

Reported to
Massachusetts Attorney General
Date filed
April 3, 2025
People notified
Not stated
Cause in filing
Not stated

The International Society for Heart and Lung Transplantation (ISHLT) is a prominent, multidisciplinary professional organization dedicated to the research, education, and advancement of the care of patients with advanced heart and lung failure. Operating globally with a significant presence in the United States, ISHLT maintains extensive databases containing sensitive records. Because of its specialized role in medical research, clinical registry management, professional membership administration, and patient advocacy, the organization collects and stores vast quantities of confidential information. This includes detailed professional credentials, clinical trial participant data, specialized medical registry entries, research grant applications, and sensitive personal details of healthcare professionals, researchers, and patients participating in institutional registries. In 2025, the International Society for Heart and Lung Transplantation reported a significant data security incident to the Massachusetts Attorney General, signaling that unauthorized actors may have breached its digital perimeter. While preliminary notifications often leave specific technical mechanisms under investigation, breaches affecting medical societies and specialized healthcare research organizations typically involve sophisticated cyberattacks such as unauthorized database access, ransomware deployment, or third-party vendor compromises. Because organizations like ISHLT bridge the gap between academic medicine, clinical practice, and administrative oversight, their networks often house centralized repositories that make them high-value targets for malicious cybercriminals seeking to harvest high-grade personal and professional records. The exposure of data resulting from an ISHLT security incident creates severe, multi-faceted risks for affected individuals. Compromised records likely include a combination of full names, dates of birth, Social Security numbers, professional credentials, and in certain registry contexts, sensitive health-related information and clinical research data. When Social Security numbers and dates of birth are leaked, victims face an immediate, long-term risk of targeted identity theft, fraudulent credit card applications, and unauthorized tax filings. Furthermore, if specialized medical history, treatment details, or clinical trial participation records are exposed, victims are uniquely vulnerable to targeted medical fraud, insurance scams, and the exploitation of sensitive health profiles by malicious actors. As an entity handling sensitive personal and professional data, the International Society for Heart and Lung Transplantation was bound by stringent legal and regulatory frameworks to maintain robust cybersecurity safeguards. Under state data protection laws such as the Massachusetts Data Privacy Law, as well as applicable federal standards like the Health Insurance Portability and Accountability Act (HIPAA) where applicable to clinical registries, organizations holding this caliber of data are legally required to implement comprehensive encryption, rigorous access controls, continuous network monitoring, and routine security audits. The occurrence of a successful breach strongly indicates a potential failure to fulfill these baseline legal obligations, leaving digital defenses vulnerable to exploitation due to inadequate administrative, physical, or technical safeguards. Receiving a formal data breach notification letter from the International Society for Heart and Lung Transplantation is a clear acknowledgment by the organization that your confidential information was compromised due to their security failures. Legally, this notification establishes the standing necessary to participate in a class action lawsuit aimed at holding the organization accountable for failing to protect your privacy. Affected individuals do not need to demonstrate actual financial loss or identity theft to pursue legal claims; the mere exposure of your sensitive data creates a compensable injury under the law. Our firm is actively investigating potential class action claims on a contingency fee basis, meaning there are never any out-of-pocket costs or attorney fees unless we successfully recover compensation on your behalf.

Full ransomware checklist

International Society for Heart and Lung Transplantation data breach questions

Is the International Society for Heart and Lung Transplantation data breach letter legit or a scam?
A notice from International Society for Heart and Lung Transplantation in the mail matches the breach International Society for Heart and Lung Transplantation reported to the Massachusetts Attorney General on April 3, 2025. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact International Society for Heart and Lung Transplantation through a phone number or website you find yourself.
Did International Society for Heart and Lung Transplantation offer free credit monitoring?
Any free monitoring International Society for Heart and Lung Transplantation is offering will be described in the notice you received, along with an activation code and a sign-up deadline. Enrolling does not give up your right to bring a claim.
Is there a International Society for Heart and Lung Transplantation data breach class action lawsuit?
Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against International Society for Heart and Lung Transplantation. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
What should I do after getting the International Society for Heart and Lung Transplantation data breach notice?
Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
Do I need a International Society for Heart and Lung Transplantation data breach lawyer or attorney?
An attorney can read your notice and tell you whether a claim makes sense. A case review here is free, and data breach cases are usually handled on contingency, so there is no upfront cost.
Can I sue International Society for Heart and Lung Transplantation over the data breach?
It depends on what was exposed, the law in Massachusetts and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
How much could a International Society for Heart and Lung Transplantation data breach settlement or claim be worth?
There is no set amount, and no International Society for Heart and Lung Transplantation settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. Keep receipts and records; they're what damages claims are built on.

Other notices sent in Massachusetts

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