Case file: MCBS LLC
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
- Sep 22, 2025 to Sep 26, 2025
- Discovered
- Sep 25, 2025, as stated in the California letter
- State and federal records
- 4 filings, Jun 26, 2026 to Jun 30, 2026
- Residents counted
- 13,685 in 2 states (TX, MA), latest filing per state
- Everyone affected
- 1,261,464, as reported to HHS OCR on Jun 26, 2026
- Information exposed
- Social Security number, Medical / health information, Health insurance, Date of birth, Postal address
- Offered to those affected
- credit or identity monitoring through Experian (term not stated in the letter we read)
- Third party named
- No
- Days to notice
- Past the statutory period in all 2 states that set one, counted from discovery to each state's first record
The letter: "On or about September 25, 2025, we learned that an unauthorized individual may have gained access to our network."
Filings
| Agency | Record date | People | In total | Days to notice | Links |
|---|---|---|---|---|---|
| Texas Texas AG | Jun 30, 2026 | 13,302 | 1,241,154 | 278 days, statute 60 days, over | Record |
| California California AG | Jun 26, 2026 | Not published | 274 days, statute 30 days, over | Letter Record | |
| Massachusetts Massachusetts OCABR | Jun 26, 2026 | 383 | 274 days, statute no fixed period | Record | |
| HHS OCR HHS OCR | Jun 26, 2026 | 1,261,464 (total) | 274 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
- 278 days from discovery (Sep 25, 2025) to the Texas record (Jun 30, 2026). Statute: 60 days from determination that the breach occurred (Tex. Bus. & Com. Code § 521.053).
- 274 days from discovery (Sep 25, 2025) to the California record (Jun 26, 2026). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
- 274 days from discovery (Sep 25, 2025) to the Massachusetts record (Jun 26, 2026). Statute: no fixed period from knowledge or reason to know of the breach (Mass. Gen. Laws ch. 93H, § 3).
The statutes
- Texas: 60 days to notify residents from determination that the breach occurred, Tex. Bus. & Com. Code § 521.053. Attorney General within 30 days of determination when 250 or more Texas residents are affected.
- 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).
- 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.
Sources and method
Records as published by Texas AG, California AG, Massachusetts OCABR, 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.