This is the CodeSystem that contains all the codes in ICPC2E 1998 Plus Am Engl (http://terminology.hl7.org/CodeSystem/icpc2E-P-AE) and ICPC2E 1998 Plus Am Engl (http://terminology.hl7.org/CodeSystem/icpc2E-P-AE). E.g. what you have to deal with if you get resources containing codes in either of them