Summary & Overview
CPT 77432: Single-Session Stereotactic Radiosurgery, Professional Component
CPT code 77432 denotes the professional component of single-session stereotactic radiosurgery (SRS) for intracranial lesions. This code captures physician management and oversight of a one-session, high-precision course of externally generated ionizing radiation guided by a three-dimensional coordinate system. Nationally, SRS is a high-acuity, resource-intensive service with implications for oncology care pathways, payer coverage policies, and facility planning.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an explanation of the clinical context for single-session SRS, how professional-component billing is applied, and the typical settings where the service is delivered. The publication provides benchmarks and payment context where available, discusses common modifier usage and billing considerations associated with professional-component reporting, and summarizes relevant policy updates that affect coverage and reimbursement for single-session stereotactic radiotherapy.
This summary is intended for hospital billing directors, radiation oncology clinicians, and payer policy analysts seeking a concise reference on coding, site-of-service implications, and the professional nature of CPT code 77432. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 77432 describes the professional component for a single-session stereotactic radiosurgery (SRS) treatment. In this procedure, the provider manages the complete course of stereotactic radiotherapy using a three-dimensional coordinate system to locate small targets or lesions in the brain and delivers precisely targeted, externally generated ionizing radiation in one session.
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Service type: Professional management of single-session stereotactic radiosurgery
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Typical site of service: Hospital outpatient department or dedicated radiation oncology center
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult referred to a tertiary radiation oncology center for single‑fraction stereotactic radiosurgery (SRS) to a small intracranial target. The patient commonly presents with a solitary brain metastasis, small primary brain tumor (e.g., meningioma), or a benign lesion such as an arteriovenous malformation. Diagnostic workup includes MRI brain with and without contrast and multidisciplinary review by neurosurgery and radiation oncology. The radiation oncologist performs simulation (immobilization, high‑resolution imaging with a stereotactic coordinate system or frame), reviews imaging, develops a single‑session treatment plan using three‑dimensional localization, and directs delivery of a high‑dose, precisely targeted external beam in one session. The professional component (physician management, target delineation, treatment planning review, and verification) is reported with 77432. Typical team members include the radiation oncologist, medical physicist, dosimetrist, radiation therapists, and nursing staff. Typical site of service is an outpatient radiation oncology department, hospital outpatient department, or specialized radiosurgery center. Billing reflects the physician professional component; the technical component (equipment, delivery) is billed separately when applicable.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when only the physician professional component is billed (physician services only). |