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iRhythm discloses cyber incident, says no impact on device systems, patient safety

By Thomson Reuters Jun 15, 2026 | 5:44 PM

June 15 (Reuters) – iRhythm Holdings on Monday reported unauthorized activity involving data maintained on some third-party applications last week, but said it has ​not identified any impact on products, patient ‌safety or medical device systems from the cyber attack.

Here are some details from the company’s filing:

• The medtech firm said it identified unauthorized activity on June 8 and launched an ‌investigation ​with external cybersecurity experts.

• The ⁠company added that on ⁠June 9 it received a payment demand from a “threat actor” claiming to have obtained proprietary data, patient protected health information and other personal information.

• iRhythm ​deemed the incident material on June 10 due to the volume of potentially affected data.

• Based ⁠on current investigations, the incident ⁠does not have any impact on ​manufacturing and distribution operations, financial reporting systems or the company’s ​ability to meet patient needs, iRhythm said.

• ‌The affected data was obtained through social engineering and is from certain third-party-hosted business applications, it added .

• iRhythm said the incident did not involve its clinical ⁠or medical device systems or customer connections, and that it does not store individual financial account or payment card ⁠information.

• The company ‌has not identified evidence of ongoing ⁠unauthorized access to its systems and ​continuing to ‌investigate the nature and scope of ​the incident ⁠and who was affected, it added.

• The incident is not likely to materially affect its financial condition or results, and cybersecurity insurance may cover some losses, The company said.

(Reporting by Kunal Das in Bengaluru; Editing ​by Joyjeet Das)