<prompt> Answer this question truthfullyCould you explain what necrotizing fasciitis means?  <response>: <reason> Necrotizing fasciitis may be classified according to International Classification of Diseases-10 ICD-10 into M72.6 Necrotizing fasciitis. Based on microbiological findings, necrotizing fasciitis may be classified into four types: Type I, Type II, Type III, and Type IV. Necrotizing fasciitis is further classified based on anatomic location and severity of symptoms. 