Ransomware Attack Exposes Patient Data at Santa Barbara Endodontics

• •Santa Barbara Endodontics experienced a ransomware attack, potentially exposing sensitive patient data.
• •The Gentlemen, the threat actor, claimed to have obtained data and threatened to publish it.
• •Hollister Family Dental reported a separate incident involving unauthorized access to patient data.

Santa Barbara Endodontics in California suffered a ransomware attack that may have compromised sensitive patient records. The attack was identified on October 8, 2026, when the practice received a ransom note from a group identified as The Gentlemen. The practice confirmed that patient records were encrypted, and an investigation is ongoing to determine the extent of the data breach. Affected data may include names, Social Security Numbers, medical histories, and insurance information. The practice has restored records from backups without paying the ransom and is offering affected patients 12 months of complimentary credit monitoring. Additionally, Hollister Family Dental & Implant Center reported a separate incident involving unauthorized access to its third-party appointment management system, which may have exposed patient data from February to May 2026.