The insomnia ransomware group listed Southern Illinois Dermatology on its data leak site on 2026-02-07. Country: US Sector: Healthcare Domains named: www.siderm.com Claim as published on the leak site: Southern Illinois Dermatology, founded in 1996 by Board-Certified Dr. Ted G. Van Acker, has grown from one office to 15 locations. We offer general, surgical, cosmetic dermatology and advanced laser treatments with attentive, professional care.