Variable: ICD9CM_SYSTEM

const ICD9CM_SYSTEM: "http://hl7.org/fhir/sid/icd-9-cm" = "http://hl7.org/fhir/sid/icd-9-cm"

The canonical code-system URI for ICD-9-CM (the legacy diagnosis classification the GEMs bridge to/from). A published identity fact; attached to a GEM target/source coding.