On December 16, 2025, the medical practice Advanced ENT & Allergy Center in Denver appeared on the leak site of the lynx Ransomware Group. Internal files were allegedly exfiltrated during a ransomware attack on the clinic that provides allergy testing, sinus treatments, and related care to patients in the Denver area.
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What Public Reporting Shows
Public reporting indicates the clinic’s systems were compromised and data was stolen before the ransomware demand was issued. The lynx Ransomware Group listed www.advancedentdenver.com on its leak site that day. Available reporting describes the exposed material as internal files; the exact number of patients affected remains unknown. The practice, which has operated for more than 20 years, offers both in-person and telehealth appointments for allergy and sinus conditions.
Why This Matters for You and Your Family
When a local medical provider is breached, the information stolen often includes names, addresses, dates of birth, phone numbers, email addresses, insurance details, and clinical notes. Any of these records can be used to file fraudulent tax returns, open accounts in your name, or impersonate you during customer-service calls. For families, a single breach can expose both parents and children if they share the same insurance policy or household address. Once that data reaches criminal marketplaces, it rarely disappears.
The Doxxing and Identity-Chain Risks
Medical records frequently contain enough personal detail to link an email address or phone number to real-world identities. Attackers then cross-reference those details with credentials stolen from other breaches, gaming platforms, or social-media accounts. The result is an identity chain that can lead to doxxing, SIM-swapping, or targeted extortion. Credential leaks like this one regularly cascade into account takeovers on gaming services, especially when children use family email addresses for Roblox, Fortnite, or other platforms.