NTT Health Plan has recently disclosed a data privacy incident involving inadvertent exposure of personally identifiable information (PII) and protected health information (PHI). The breach, which occurred between December 15, 2025, and December 29, 2025, was due to a system used by the Plan’s business associate, Quantum Health. Affected individuals are now being notified and provided guidance on protective steps.
NTT Health Plan’s Data Breach Investigation
On December 29, 2025, Quantum Health notified NTT Health Plan of an inadvertent disclosure of sensitive personal and health-related information. The issue arose when a claims report was mistakenly shared with another plan member. Upon learning of the incident, Quantum Health took immediate action to secure the exposed information and began a thorough investigation into the matter.
Based on the investigation to date, NTT Health Plan and Quantum Health have found no evidence to suggest that the information was misused or further disclosed. Quantum Health confirmed with the unintended recipient of the report that the document was deleted, and no additional disclosures were made.
Despite this, the exposure of sensitive personal data, including PII and PHI, presents potential risks. Healthcare data, in particular, is highly targeted by cybercriminals due to the value of the information and its potential use for fraud.
When Did This Breach Occur?
The inadvertent disclosure took place between December 15, 2025 and December 29, 2025.
Quantum Health notified the Plan of the incident on December 29, 2025, and the investigation confirmed the exposure and secure deletion of the document.
What Information Was Breached?
The following types of information may have been included in the exposed report:
While the full scope of exposed data has not been detailed, individuals whose names appeared in the report may have had personal and health-related information exposed. The combination of PII and PHI significantly raises the risk of identity theft, medical identity fraud, and other forms of misuse.
What You Can Do
If you received notification of this breach, you should consider taking the following steps:
-
Monitor your financial and health accounts for any suspicious activity or unauthorized transactions.
-
Place a fraud alert or credit freeze on your credit file with the three major credit bureaus to prevent identity theft.
-
Review any claims or explanation of benefits (EOB) documents from your health insurance provider and report any unfamiliar items.
-
Check your credit reports for any unfamiliar activity or accounts opened in your name. You are entitled to a free credit report from each bureau once a year through AnnualCreditReport.com.
-
Report suspected identity theft or fraud to your financial institutions, the Federal Trade Commission (FTC), and local law enforcement.
NTT Health Plan also encourages affected individuals to take full advantage of any free credit monitoring or identity protection services offered.
File a Data Breach Lawsuit Against NTT Health Plan
If your personal or health information was exposed due to this incident, you may be entitled to pursue compensation. Even if misuse has not been directly reported, exposure of Social Security numbers, health information, and other sensitive data can lead to significant long-term risks, including medical fraud, identity theft, and other financial crimes.
Class action lawsuits provide a means for individuals affected by the same incident to join together and seek restitution for their losses. You may be entitled to compensation for out-of-pocket expenses, emotional distress, and the time spent protecting your data.
Contact us at Class Action U for a free consultation. We can connect you with an attorney who specializes in class action lawsuits. Fill out our quick, easy, and secure form to explore your legal options. There is no cost to reach out to our legal partner, and no obligation after speaking with someone from our team.
