What Are Claim Adjustment Reason Codes (CARCs)?
October 17, 2026Learn what Claim Adjustment Reason Codes (CARCs) mean, how they work with group codes and RARCs, and where to find them in X12 835 remittance advice.
Medical Claim Denials: Common Reasons & Solutions
October 13, 2026Learn common medical claim denial reasons, how to read CARC and RARC codes on an 835 ERA, and how to troubleshoot denied claims for Medicare, Medicaid and commercial payers.
CMS Encounter Data Update: RARC Codes N923, N924, N925 and N926
October 06, 2026CMS began accepting RARC codes N923, N924, N925 and N926 for Medicare Advantage encounter data on September 11, 2026. Learn what the codes mean and where they are reported in the 837 CAS segments.
Does an NPI Expire? NPI Changes, Deactivation and Reactivation
September 06, 2026Learn whether an NPI expires, when an NPI can be deactivated or reactivated, and whether changes to a provider's name, address, employer or specialty require a new NPI.
NPI Numbers on the CMS-1500 Claim Form
September 06, 2026Learn where NPI numbers appear on the CMS-1500 claim form, including Boxes 17b, 24J, 32a and 33a, and which provider each NPI identifies.