RARC N390: Service Cannot Be Billed Separately

The billed service or procedure cannot be charged as a separate line item because it is considered an integral part of another service already billed. The payer expects this service to be bundled with the primary procedure. Review your coding for correct use of bundling rules and modifiers, and if the service was truly distinct and separately identifiable, resubmit with the appropriate modifier (such as modifier 59) and supporting documentation.