This is the CodeSystem that contains codes in both Health Insurance Prospective Payment System (HIPPS) (https://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/ProspMedicareFeeSvcPmtGen/HIPPSCodes) and Health Insurance Prospective Payment System (HIPPS) (https://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/ProspMedicareFeeSvcPmtGen/HIPPSCodes).