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Santa Barbara Endodontics Data Breach: SSNs and Health Records Exposed

Claimdepot • November 10, 2026

Santa Barbara Endodontics , a dental specialty practice in Santa Barbara, California, experienced a ransomware attack that may have exposed sensitive patient records.

The practice filed a disclosure California Attorney General on Nov. 6, 2026, and posted a notice on its website. Written notifications were sent to affected patients beginning on Nov. 7, 2026.

The breach involved a ransomware attack on Santa Barbara Endodontics' computer systems that is believed to have occurred on or around Oct. 7, 2026. However, the company's notification letter stated that the exact date or dates of the intrusion are not yet known.

The incident came to light when the practice received a ransom note from an unknown group implying it wanted money in exchange for restoring patient files.

Upon further review, the practice discovered that patient record files on its systems had been encrypted with malicious ransomware. The practice believes the unknown threat actor accessed its patient records and may have moved copies of those records from its systems.

On Oct. 16, 2026, a ransomware group called The Gentlemen posted on the dark web, claiming it had obtained data from Santa Barbara Endodontics and intended to publish the stolen information within eight to nine days.

Santa Barbara Endodontics' response to the breach

The practice is offering affected patients 12 months of complimentary identity theft monitoring, prevention and mitigation services. Individuals who wish to take advantage of this offer can the practice by email at [email protected] for enrollment instructions.

Patients with questions or seeking additional information can also reach the practice by phone at 1-800-821-4334 or by mail at 9 East Pedregosa St., Suite B, Santa Barbara, CA 93101.

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Affected information types not yet disclosed

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Ransomware Attack Exposes Patient Data at Santa Barbara Endodontics 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. 2 sources 58

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Santa Barbara Endodontics Data Breach: SSNs and Health Records Exposed

The full story

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Attack Types (1)

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MITRE ATT&CK (1)

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