External Code Sources
The following web pages are sources for various codes used in claim submissions and responses.
- Claim Status Codes • X12 External Code Source 508
 - Claim Adjustment Reason Codes (CARC) • X12 External Code Source 139
 - Remittance Advice Remark Codes (RARC) • X12 External Code Source 411
 - HCPS Procedure Codes
 - Place of Service Code Set for Professional Claims
 - Health Insurance Prospective Payment System (HIPPS) Rate Code for Skilled Nursing Facilities
 - Code (Standard ISO) for country in whose currency the charges are specified. CODE SOURCE 5: Countries, Currencies and Funds