X12 278 Requested Service Type

This set of codes identifies what service is being requested. For queries, if the query is not searching for a specific service type, the not-applicable data absent reason code can be used. It is a combination of X12 Service Type codes, CPT (HCPCS I) and HCPCS II procedure code modifiers, ICD-9 Procedure codes, ICD-10 Procedure codes, and NDC Drug codes. NOTE: HCPCS Level 1 Codes are the CPT codes so either code system could be used to send the codes. When receiving the codes from an X12 system, the system returned will be HCPCS even if it was initially sent as a CPT code.