All PlansBilling CodesMedium impact
PAP227 - Unlisted CPT and HCPCS - Title change. Included additional information on unlisted codes. Added section for Laboratory and Anesthesia unlisted codes. Added how to correctly bill the descriptive information.
Blue Cross of Idaho·ID · Anesthesiology·Coding
Effective date
Oct 1, 2025
We identified it
Jun 19, 2026
Summary
Blue Cross of Idaho updated their unlisted CPT and HCPCS billing policy, adding specific requirements for laboratory and anesthesia unlisted codes. The policy now requires specific descriptive information in designated claim form fields and includes new billing requirements for labs (test identifiers) and anesthesia (comparable CPT codes with start/stop times).
Action Required
Immediately: Update billing procedures for unlisted codes - ensure field 19 on CMS-1500 or field 80 on UB-04 contains comparable CPT and narrative description. Laboratory staff must include specific test identifiers (test name, internal code, or abbreviation) in notes field. Anesthesia billing must include comparable CPT code, start/stop times, and appropriate modifiers when using unlisted codes. Set unlisted code unit values to '1' in billing system.