Quantum Health Data Breach Investigation

Quantum Health Inc., a healthcare navigation company based in Dublin, Ohio, has confirmed a data breach that may have compromised sensitive personal and medical information belonging to an undisclosed number of individuals. The company reported the incident to state regulators, including the Massachusetts Office of Consumer Affairs and Business Regulation, and has begun mailing notification letters to those affected. Contact our data breach lawyers to learn more.

What Happened at Quantum Health?

According to Quantum Health's breach notification, an unauthorized party gained access to the company's IT network after an employee responded to a fraudulent phone call. This access reportedly occurred between May 29 and June 1, 2026 and the company first noticed a service outage on June 1 and later traced the disruption back to this unauthorized activity.

A subsequent investigation concluded on July 8, 2026, and determined that the intruder had accessed files containing a wide range of personal and health related information. The exposed data reportedly includes:

• Full names and dates of birth
• Social Security numbers
• Home addresses, phone numbers and email addresses
• Health insurance policy numbers and claims information
• Medical records, including diagnoses, treatment details and prescriptions
• Provider names and dates of service

Because Quantum Health serves as a healthcare navigation and benefits coordination platform for large employers, the scope of exposed information may be significant given the sensitive nature of the data the company handles.

Medical and insurance data is considered especially valuable to identity thieves. Unlike a stolen credit card number, a Social Security number or medical history cannot simply be replaced. Individuals affected by this type of breach may face risks, including Medical identity theft, where someone uses stolen information to obtain treatment or prescriptions.

Why Choose The Lyon Firm

Data breach litigation involving healthcare companies requires attorneys who understand both data privacy law and the unique harms tied to exposed medical information. The Lyon Firm has spent nearly two decades representing individuals across the country.

If your information was exposed in the Quantum Health data breach, contact The Lyon Firm today for a free case evaluation. Our attorneys can help you understand your rights and determine whether legal action is appropriate for your situation.

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The details described above are based on information reported in Quantum Health's public breach notification and related public filings as of the date of publication and may be updated as new information becomes available. No claims are made here regarding fault on the part of Quantum Health.