CPT code 57155 represents gynecologic brachytherapy in which applicator devices are placed into the uterus and the sides of the cervix to hold radioactive material that treats cervical and uterine cancer cells. This procedure is a key component of definitive and adjuvant treatment for locally advanced gynecologic malignancies and has implications for facility resource use, radiation oncology practice patterns, and payer coverage policies nationwide.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise synthesis of clinical context, common sites of service, and the service type for 57155, plus an overview of typical billing considerations and common modifiers used with procedural radiation services. The publication presents benchmarks and guidance on documentation elements that influence coding and reimbursement, highlights policy update implications for payer coverage, and outlines areas where coverage variability often occurs.

This national-level summary is intended for health system revenue leaders, coding professionals, and radiation oncology clinicians seeking a clear, actionable reference on the clinical purpose and billing context of CPT code 57155.