Does anyone have reference to specific guidelines related to being able to bill CPT code 96523 (Irrigation of implanted venous access device for drug delivery systems) with HCPCS code G0498 (Chemotherapy administration, intravenous infusion technique; initiation of infusion in the office/other outpatient setting using office/other outpatient setting pump/supplies, with continuation of the infusion in the community setting (e.g., home, domiciliary, rest home or assisted living) using a portable pump provided by the office/other outpatient setting, includes follow up office/other outpatient visit at the conclusion of the infusion)