970,000 Medi-Cal Members Affected by Paradigm Healthcare Data Breach

Paradigm Healthcare Services has told the US Department of Health and Human Services (HHS) that a data breach discovered last year affected more than 970,000 people.

San Francisco-based Paradigm processes billing for Medi-Cal, California’s Medicaid program, under a data use agreement with the California Department of Health Care Services (DHCS). It also maintains Medi-Cal member identification numbers on the department’s behalf.

The company says it became aware of unauthorized access to its local network on October 13, 2025. “On August 18, 2026, we determined that certain files containing select individuals’ protected health information may have been accessed by an unauthorized party between October 8, 2025, and October 15, 2025,” Paradigm said.

The compromised files contained names, dates of birth, gender, and Medi-Cal member identification numbers. Paradigm says its online service documentation and billing platform, Student Health Network (SHN), was not impacted.

Paradigm’s notification letters are dated September 14, 2026,...

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