This is the CodeSystem that contains all the codes in NHSN SSI Anatomic Site (http://terminology.hl7.org/CodeSystem/NHSNSSIAnatomicSite) and NHSN SSI Anatomic Site (http://terminology.hl7.org/CodeSystem/NHSNSSIAnatomicSite). E.g. what you have to deal with if you get resources containing codes in either of them