Marlboro-Chesterfield Data Breach Affects 235,911 People

On January 16, 2025, Marlboro-Chesterfield Pathology, P.C. experienced a data breach involving unauthorized access to its internal IT systems. According to the company’s investigation, an outside actor—later identified as the SAFEPAY ransomware group—gained access to and exfiltrated approximately 30 GB of sensitive data.

The incident was publicly disclosed to the U.S. Department of Health and Human Services on May 9, 2025.

This breach affected a total of 235,911 individuals across the United States. The exposed information varies by individual, but may include a combination of personally identifiable information (PII) and protected health information (PHI): name, address, date of birth (PII), as well as medical treatment information and health insurance details such as policy numbers (PHI).

The SAFEPAY ransomware group claimed responsibility for the attack, posting about it on the dark web on January 25, 2025, and asserting that they had obtained and later deleted the stolen data.

Marlboro-Chesterfield Pathology's response

To help affected individuals, Marlboro-Chesterfield Pathology, P.C. has provided a comprehensive Notice of Data Breach on its website.

Recommendations for protecting personal information:

• Monitoring account statements and credit reports for unauthorized activity.
• Placing fraud alerts or security freezes on credit files with the three major credit bureaus.
• Contacting the Federal Trade Commission and state Attorneys General for additional guidance and resources.

The company has also established a dedicated call center for questions related to the breach, available at (866) 408-2171, Monday through Friday, 8:00 a.m. to 5:30 p.m. Central Time (excluding major U.S. holidays).

Given the method and scale of the breach, it is important for affected individuals to remain vigilant. Regularly review your credit reports, consider placing a fraud alert or security freeze, and be cautious of unsolicited communications that may attempt to use your personal information.

For more information about their services and organizational background, visit the Marlboro-Chesterfield Pathology website.