California-Based Heart Monitor Maker Breached, Affecting 8,179,772 People – Names, Insurance Numbers, Birth Dates and More at Risk

A California-based heart monitor maker is warning more than eight million people that hackers stole their personal and health information. iRhythm Holdings says unauthorized individuals accessed and downloaded data from certain third-party-hosted business applications between June 3rd and June 8th. The U.S. Department of Health and Human Services (HHS) breach portal now lists 8,179,772 people as impacted. The stolen data includes patient names, addresses, email addresses, phone numbers, dates of birth, iRhythm account numbers, device serial numbers, insurance numbers and dates of service. “On or around June 8, 2026, iRhythm detected unauthorized access in certain third-party-hosted business applications. Upon detecting the unauthorized access, we promptly implemented our incident response plan.

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