Major Data Breach Alert: Allegheny Health Network Confirms Cybersecurity Incident Impacting Patient Information

On January 17, 2025, Allegheny Health Network (AHN) reported a data breach to the Massachusetts Attorney General. This breach stemmed from a problem with one of its vendors, IntraSystems, LLC, which led to unauthorized access to sensitive patient information. This information included names, dates of birth, addresses, Social Security numbers, financial account details, health insurance info, treatment records, and even medical device serial numbers. Following their investigation, AHN began notifying those whose data was compromised.

If you received a breach notification from AHN or IntraSystems, it’s important to know what’s at stake and how to act. Consulting a data breach lawyer can help you understand ways to prevent fraud or identity theft. They can also inform you about your options after the breach. For further insight, check our recent guide on this issue here.

Details are still coming in about the AHN/IntraSystems data breach, but the information available sheds light on its causes. IntraSystems, as a third-party vendor, is responsible for hosting and securing some of AHN’s systems. The breach occurred between October 11, 2024, and November 19, 2024, affecting only certain patients who used AHN’s Home Medical Equipment and Home Infusion therapy services.

After discovering the breach, AHN carefully reviewed the leaked files to identify what information was accessed. This varies by individual, but could include personal details like names, Social Security numbers, and more. The affected patients received letters on January 17, 2025, outlining the compromised data.

For context, Allegheny Health Network is a major health system in western Pennsylvania. Headquartered in Pittsburgh, AHN consists of multiple hospitals, outpatient centers, and various healthcare practices. It specializes in areas such as oncology, cardiology, and women’s health, employing around 21,000 people and generating approximately $4 billion in revenue each year.