Tieu Dental Corporation, an oral and maxillofacial surgery practice with offices in California, experienced a data breach from unauthorized network access that occurred between July 28-29, 2025. The company discovered the breach on January 11, 2026, and publicly disclosed it on March 5, 2026. The incident was reported to the Massachusetts Office of Consumer Affairs and Business Regulation and the California Attorney General, with official breach notification letters sent to affected individuals.
The compromised files contained full names combined with dates of birth, Social Security numbers, medical records, treatment plans, prescription information, and health insurance details. The exact number of affected individuals has not been disclosed by the company, though notifications have been sent to individuals in Massachusetts. The company's official statement on its website offers identity protection services, including one year of free Experian IdentityWorks credit monitoring, and reports no known misuse of the data.
Details can emerge later, and notices may be delayed.