CPT code 77407 represents advanced external beam radiation therapy at level 2 complexity, including three–dimensional conformal radiation therapy (3D CRT) and intensity modulated radiation therapy (IMRT) delivered to a single isocenter. This code captures more complex beam arrangements and conformal targeting than basic 2D delivery and may include imaging guidance when performed. It is nationally relevant because it denotes a common, higher-complexity radiation delivery level used across oncology care settings and influences procedural categorization and billing for radiation therapy services.

Key payers covered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise benchmarking and policy-oriented overview that outlines how this service is classified, typical sites of service, and the clinical context for 3D CRT and IMRT at a single isocenter. The publication reviews coding definitions and service characteristics, summarizes common billing modifiers and payer considerations (where available), and situates 77407 within radiation oncology service lines.

This summary is intended for national audiences including health plan analysts, billing professionals, and oncology practice administrators who need a clear, policy-focused reference to the code and its clinical role. Data not available in the input will be noted where applicable in detailed sections.