Dean Cosmetic Dentistry Center Data Breach: Sensitive Files Compromised

Dean Cosmetic Dentistry Center, a cosmetic and general dental practice in Knoxville, Tennessee, has been targeted in a ransomware attack, allegedly compromising patient records and employee information.

On June 18, 2026, the ransomware group NightSpire posted a claim on a dark web site hosted on the Tor network. In the posting, the group stated it had successfully obtained data belonging to Dean Cosmetic Dentistry Center and intended to publish it within three to four days of the posting.

The data reportedly obtained by NightSpire includes patient records, invoice records, employee information and other sensitive business and operational data. Because Dean Cosmetic Dentistry Center is a healthcare provider, patient records maintained by the practice could include protected health information alongside personal identifying details.

As of June 23, 2026, no attorney general filings, regulatory disclosures or consumer notification details related to this incident have been made publicly available. The specific categories of personal information contained within the compromised records have not been officially confirmed.

The total number of individuals affected has not been disclosed.

Dean Cosmetic Dentistry Center's response to the breach

As of June 23, 2026, Dean Cosmetic Dentistry Center has not issued a public statement about the ransomware attack claimed by NightSpire. Individuals who believe they may have been impacted should not wait for a formal notification to begin taking protective steps.

Current and former patients of Dean Cosmetic Dentistry Center, as well as current and former employees, may wish to contact the practice directly at 865-539-1119 during office hours, Monday through Friday, 8:00 a.m. to 5:00 p.m., to ask about the status of the incident and any planned notifications.