CPT code 58346 denotes the insertion of Heyman capsules into the uterus to hold radioactive material for brachytherapy, primarily used in treating endometrial cancer. This procedure is a specialized gynecologic radiation service that enables focused intracavitary radiation, reducing dose to surrounding tissues while delivering therapeutic radiation to the endometrium. Nationally, this code represents a niche but important service within gynecologic oncology care pathways and radiation oncology practices.

Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical and billing overview, typical sites of service, and discussion of common claim considerations tied to this procedural code. The publication covers expected service context, how the code fits into brachytherapy care episodes, and operational considerations relevant to hospital outpatient departments and ambulatory surgical centers.

This summary prepares clinicians, coding professionals, and payers to understand what CPT code 58346 represents clinically and administratively, and what elements to review when evaluating claims or incorporating the procedure into care workflows. Data not available in the input are noted where applicable in detailed sections.