This is the CodeSystem that contains all the codes in ChargeItemCode (http://terminology.hl7.org/CodeSystem/chargeitem-billingcodes) and ChargeItemCode (http://terminology.hl7.org/CodeSystem/chargeitem-billingcodes). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem 7ce0a400-f46c-450c-9a9a-e539c78d0b35-143
This code system http://hl7.org/fhir/comparison/CodeSystem/7ce0a400-f46c-450c-9a9a-e539c78d0b35-143 defines codes, but no codes are represented here