This is the CodeSystem that contains all the codes in International Statistical Classification of Diseases and Related Health Problems, 10th Revision, Canada (http://hl7.org/fhir/sid/icd-10-ca) and International Statistical Classification of Diseases and Related Health Problems, 10th Revision, Canada (http://hl7.org/fhir/sid/icd-10-ca). E.g. what you have to deal with if you get resources containing codes in either of them