Rancho Family Medical Group notified patients of a data security incident involving potential unauthorized access to personal information via third-party technology partner KMJ Health Solutions. The incident occurred on or around November 19, 2023, and was discovered on January 11, 2024. Affected data may include names, dates of birth, medical record numbers, treatment locations, dates of service, and procedure codes. The impacted server was wiped and re-imaged. No evidence of misuse was found.