This is the CodeSystem that contains codes in both ChargeItemCode (http://terminology.hl7.org/CodeSystem/chargeitem-billingcodes) and ChargeItemCode (http://terminology.hl7.org/CodeSystem/chargeitem-billingcodes).
Generated Narrative: CodeSystem 818959f7-0f8d-4f6f-b46c-7c5a5833d862-147
This code system http://hl7.org/fhir/comparison/CodeSystem/818959f7-0f8d-4f6f-b46c-7c5a5833d862-147 defines codes, but no codes are represented here