Summary & Overview
CPT 77290: Radiation Treatment Simulation and Planning
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.
Billing Code Overview
CPT code 77290 describes the creation of a simulated radiation treatment plan using imaging and computerized reconstruction to define tumor location, size, beam ports, and dose distribution prior to starting radiation therapy. The service uses CT or MRI data to recreate the tumor and surrounding anatomy in a simulator so the physician can determine beam entry ports and optimize targeting accuracy.
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Service type: Radiation treatment simulation and planning
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Typical site of service: Outpatient radiation oncology department or hospital-based radiation therapy facility
Clinical & Coding Specifications
Clinical Context
A 64-year-old male with a newly diagnosed left-sided non-small cell lung carcinoma is referred to radiation oncology for definitive radiotherapy. Prior to treatment planning, the radiation oncologist orders a CT simulation to define tumor location, size, and relation to critical structures. The patient is positioned supine on the simulation table using immobilization devices (thermoplastic mask and vacuum cushion) to reproduce daily treatment setup. CT images of the thorax are obtained with the patient in treatment position; these images are reconstructed and imported into the treatment planning system. The physician and dosimetrist delineate the gross tumor volume (GTV), clinical target volume (CTV), and organs at risk (OARs), and simulate beam arrangements and entry ports to optimize dose distribution while minimizing exposure to heart, lungs, and spinal cord. The simulation session documents patient positioning, immobilization, imaging parameters, and any motion management (e.g., breath-hold or 4D CT) required for planning. This simulated field data (imaging and beam portals) is used to generate the radiation treatment plan and to guide daily treatment delivery.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When billing only the physician’s professional interpretation/planning portion separate from technical simulation services |