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.