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Arthritis Center of Riverside

n0n

Ransomware leak-site victim intelligence · EN

Posted
Oct 24, 2026
Country
United States
Industry
rheumatology medical practice

Summary

Written by ThreatClusterfrom victim profile, leak post

n0n claims it will publish scanned laboratory requisitions for named patients, including dates of birth, home addresses and Medicare subscriber details, covering April through October 2026; it also claims accounts receivable aging with patient names, account numbers, insurers and balances, and patient billing files and correspondence. The victim identified on the leak page is Arthritis Center of Riverside, a United States rheumatology medical practice. The leak post states the publication status is listed and that the material would be published if no settlement is reached.

Describes what the group claims on its leak site. A listing is not confirmation that a breach occurred.

Victim profile

Headquarters
Riverside, California, United States
Riverside, California, United States

What was taken

What will be published if no settlement is reached Scanned laboratory requisitions of named patients with dates of birth, home addresses and Medicare subscriber details, April through October 2026; Accounts receivable aging with patient names, account numbers, insurers and balances; Patient billing files and records correspondence of the practice

Data categories
Medical dataPIIPatient recordsBilling data