This is the CodeSystem that contains codes in both FamilyHistoryAbsentReason (http://terminology.hl7.org/CodeSystem/history-absent-reason) and FamilyHistoryAbsentReason (http://terminology.hl7.org/CodeSystem/history-absent-reason).
Generated Narrative: CodeSystem 9e51d01c-2171-44b3-bbfd-16a67ff06a3d-486
This code system http://hl7.org/fhir/comparison/CodeSystem/9e51d01c-2171-44b3-bbfd-16a67ff06a3d-486 defines codes, but no codes are represented here