MC Pathology Data Breach Investigation

The data breach lawyers at The Lyon Firm are investigating a data security incident at MC Pathology (Marlboro-Chesterfield Pathology, P.C.), which may have leaked the sensitive personal information of a large number of individuals. Contact our legal team to discuss how to protect yourself following a data theft incident and to consider taking legal action. Our lawyers have settled numerous data breach lawsuits on behalf of plaintiffs in all fifty states.

What happened at MC Pathology?

This incident was first reported to the U.S. Department of Health and Human Services (HHS) by Marlboro-Chesterfield Pathology on May 9, 2025. A sample data breach notification letter posted on their website notes that on January 16, 2025, MC Pathology experienced a data breach involving “unauthorized access to its internal IT systems.”

A later investigation concluded that the SAFEPAY ransomware group gained access to and exfiltrated approximately 30 GB of sensitive data. The SAFEPAY ransomware group claimed responsibility for the attack on a dark web post on January 25, 2025.

This breach may impact over 235,000 individuals across the country. The compromised information may include a combination of personally identifiable information (PII) and protected health information (PHI), including the following: name, address, date of birth (PII), as well as medical treatment information and health insurance details such as policy numbers (PHI).