Central California Alliance for Health notified members that on May 7, 2020, employee email accounts were accessed illegally by an unknown person for approximately one hour. The incident may have exposed member health information including care management records, claims information, dates of birth, demographic information, Medi-Cal ID numbers, medical information, and referral information. Financial information and SSNs were not included. A revised supplemental notice was issued in January 2021 after additional impacted individuals were identified.