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Incident · State breach notice (California AG)

MPOWERHealth data breach letter: a June 2025 network intrusion, patient files identified 16 months later

Published . Updated 2026-11-14. By the cisonews.net Desk.

MPOWERHealth Holdings, a Texas company that provides surgical neuromonitoring and related services, is writing to patients about a network intrusion it detected on or about June 26, 2025. On October 20, 2026, after a forensic investigation and a manual review of documents, it found that files holding personal and protected health information were in the affected systems between June 23 and June 26, 2025. The California attorney general posted the notice on November 13, 2026, 505 days after detection. No count has been published. On November 14, MPOWERHealth was not on the HHS list of breaches under investigation or on the Vermont list.

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DateEvent
June 23, 2025Start of the window in which files may have been accessed
June 26, 2025MPOWERHealth detects the intrusion and secures its networks
October 20, 2026Document review finds patient files were in the affected systems
November 13, 2026Notice posted by the California attorney general

What is MPOWERHealth?

The company describes itself as a provider of data-driven solutions for neurological and musculoskeletal care. Its site lists intraoperative neuromonitoring (IONM) and models for hospitals and ambulatory surgery centers in spine, neuro and orthopedic care. The letter is signed from 5080 Spectrum Dr., Suite 1100E, Addison, Texas. The letter does not say which hospitals or patients' procedures the files came from. Why you got a breach letter from a company you never dealt with explains the pattern.

What information was involved?

The letter names the person's full name and leaves the rest as a field filled in per letter. It says the files held personally identifiable information and protected health information. It does not say whether Social Security numbers, insurance numbers or diagnoses were among them; your own letter lists what applies to you.

Has the medical information been misused?

MPOWERHealth says it has no evidence that the medical information was or will be used for unintended purposes. It recommends reading the explanation of benefits statements from your health insurer and following up on any service you do not recognize. It also suggests asking your insurer for a year-to-date report of all services paid for you.

Why did the notice take 16 months?

The letter puts the gap down to an extensive forensic investigation and a manual document review, carried out with outside cybersecurity professionals, that ended on October 20, 2026. The letter gives October 20, 2026 as the date it learned whose files were involved, and does not explain why the review took that long. Healthcare provider breach notices, the largest 2026 health breaches reported to HHS and the health care sector page set this against other health notices in the log.

What is MPOWERHealth offering?

Identity monitoring from Kroll at no cost, with single-bureau credit monitoring, fraud consultation and identity theft restoration. The sample letter leaves the number of months and the activation deadline blank. Activation is at enroll.krollmonitoring.com with the membership number on the letter. Questions go to the response line at (844) 301-0181, 9:00 am to 6:30 pm Eastern, Monday through Friday. Credit monitoring offers in breach letters compares Kroll offers with the others in the log.

How this disclosure's timing compares

MPOWERHealth Holdings LLC disclosed 505 days after the discovery date its notice gives. Across the 206 other state breach notices on cisonews.net that date discovery to the day, the median gap is 100 days.

California's breach-notice rule

California's breach law (Civil Code § 1798.82 for businesses, § 1798.29 for state agencies) requires any person or business that must notify more than 500 California residents of a single breach to submit one sample copy of that notice to the Attorney General electronically. The California Attorney General's breach list, where this notice was found, is built from those submissions. Source: California Department of Justice, Office of the Attorney General, Data Security Breach Reporting. The guide Data breach laws by state: notice deadlines and attorney general thresholds in 23 states reads the rule in full, and the glossary defines Breach notification law.

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Sources

  1. 2026-11-13 · AMPOWERHealth Holdings LLC, notice filed with the California Attorney General, published November 13, 2026
  2. 2026-11-13 · ACalifornia Attorney General, data breach notification record, published November 13, 2026
  3. 2026-11-14 · AMPOWERHealth, home page, published November 14, 2026
  4. 2026-11-14 · AHHS Office for Civil Rights, breach portal, reports under investigation (CSV export checked November 14, 2026), published November 14, 2026
  5. 2026-11-14 · AVermont Attorney General, security breach notices (checked November 14, 2026), published November 14, 2026
  6. undated · ACalifornia Department of Justice, Office of the Attorney General, Data Security Breach Reporting

Tier A: the organization itself (including notices it filed with a state attorney general), a regulator or SEC EDGAR. Tier B: established press. Each fact on this page carries its supporting passage in the page source.

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