The INC Ransomware group has allegedly targeted Louis Tieu DDS MD, a prominent oral and maxillofacial surgeon based in California. Dr. Tieu, an alumnus of the UCSF School of Dentistry and UCD School of Medicine, operates a practice with a reported revenue of $5 million. The ransomware group posted the claim on August 11, 2025, asserting that the surgeon is “responsible for the leak of more than 500 pieces of personal data belonging to his clients.” This incident places the highly sensitive personal and medical information of numerous patients at significant risk.
The evidence posted by the threat actors includes a variety of sensitive documents, indicating a severe data breach affecting the practice’s patients. The leak of such information, which includes government-issued IDs and health insurance details, could lead to identity theft, financial fraud, and other malicious activities targeting the individuals whose data was compromised. The breach highlights the growing trend of ransomware attacks targeting the healthcare sector, where time-sensitive operations and the critical nature of data make organizations more likely to be targeted.
The allegedly exfiltrated data includes, but is not limited to:
- Personal Identification documents, including Driver Licenses and ID cards
- Health insurance information
- Financial data, including Debit Card details
