The interlock ransomware group listed O2 Dental Group on its data leak site on 2026-10-05. Country: US Sector: Healthcare Domains named: o2smiles.com Claim as published on the leak site: O2 Dental Group of Wilmington makes your dental care easy by providing a variety of family dentistry services under one roof! As a dental provider, O2 Dental Group is subject to strict privacy protections, primarily the Health Insurance Portability and Accountability Act (HIPAA) in the United States, but they have not complied with security measures, resulting in compromised patient health records (PHI), billing and insurance documents, consent and authorization forms.