CPT code 77290 represents physician-directed radiation treatment simulation that uses CT or MRI imaging and computerized reconstruction to recreate the tumor and surrounding anatomy, define beam entry ports, and plan radiation doses before therapy begins. This preparatory planning step is essential for accurate targeting of malignant tissue and minimizing exposure to adjacent normal structures, making it a critical component of modern radiation oncology workflows nationwide.

Key payers in the national analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of clinical intent and service setting, common billing practices, and the policy and reimbursement context that affects coverage and claims processing for simulation services. The publication also outlines typical modifiers encountered in claims, practical coding considerations tied to treatment planning, and implications for facility and physician billing lines.

Intended for billing managers, radiation oncologists, and policy analysts, the article summarizes what CPT code 77290 represents, where the service is typically performed, payer considerations, and the types of documentation and clinical data that support appropriate coding. Data not available in the input are noted where applicable.