Bills may be split to divide work between clients, payers or for reimbursement to different service providers for performing a shared service.
[1][2] Add-on codes are additional work associated with a primary service or procedure.
Add-on codes can and should only be billed when the provider has performed and billed the primary service.
[3] CMS guidelines and coding textbooks agree that add-on codes should be on the same claim as the primary code.
[4][5][6] This business term article is a stub.