Case file: Tieu Dental Corporation
Every government filing on this incident, the dates as stated, and the days to notice against each state's statute. Built from the records on Nov 9, 2026, agency link on every row. Not legal advice.
The incident
- Breach window
- Jul 29, 2025
- Discovered
- Jan 11, 2026, as stated in the California letter
- State and federal records
- 3 filings, Mar 5, 2026
- Residents counted
- 2 in 1 state (MA), latest filing per state
- Everyone affected
- 8,918, as reported to HHS OCR on Mar 5, 2026
- Information exposed
- Social Security number, Medical / health information
- Offered to those affected
- 12 months of credit or identity monitoring through Experian
- Third party named
- Yes, the letter attributes the incident to a vendor or service provider
- Days to notice
- Past the statutory period in California, counted from discovery to the state's first record
The letter: "Upon learning this, we promptly conducted an extensive and comprehensive review of the impacted files, and, on January 11, 2026, we discovered that certain files containing your personal information may have been accessed and/or acquired..."
Filings
| Agency | Record date | People | In total | Days to notice | Links |
|---|---|---|---|---|---|
| Massachusetts Massachusetts OCABR | Mar 5, 2026 | 2 | 53 days, statute no fixed period | Record | |
| California California AG | Mar 5, 2026 | Not published | 53 days, statute 30 days, over | Letter Record | |
| HHS OCR HHS OCR | Mar 5, 2026 | 8,918 (total) | 53 days | Record |
People is the count the filing gives, residents of the state unless marked total. Days to notice runs from the discovery date the letter states, or from the end of the breach window when no letter states one, to the date on the state's first record of the incident. "Over" marks a count past the days the state's statute allows for notice to residents. The statute's trigger is a question of fact, the days are arithmetic.
Notice timing, state by state
- 53 days from discovery (Jan 11, 2026) to the Massachusetts record (Mar 5, 2026). Statute: no fixed period from knowledge or reason to know of the breach (Mass. Gen. Laws ch. 93H, § 3).
- 53 days from discovery (Jan 11, 2026) to the California record (Mar 5, 2026). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
The statutes
- Massachusetts: no fixed period to notify residents from knowledge or reason to know of the breach, Mass. Gen. Laws ch. 93H, § 3. Attorney General and OCABR as soon as practicable and without unreasonable delay, every breach.
- California: 30 days to notify residents from discovery or notification of the breach, Cal. Civ. Code § 1798.82. Sample notice to the Attorney General when more than 500 Californians are notified, within 15 days of the consumer notice (effective 2026).
Sources and method
Records as published by Massachusetts OCABR, California AG, HHS OCR. Letter facts (discovery date, monitoring, third party) are read from the consumer letter the agency posted, 1 letter read for this incident, and quoted so you can check them. Texas and HHS publish no letters. First-seen times on each record page. Spot an error? Email support@breachtally.com with this page link.