CPT code 19307 denotes a mastectomy, the surgical removal of an entire breast. This code captures a high-acuity surgical service with significant clinical, billing, and policy implications across the U.S. health system. Mastectomy services affect hospital surgical volume, facility and professional reimbursement, and outcomes reporting for breast cancer care and risk-reducing procedures.

Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how CPT code 19307 is classified clinically, typical sites of service where the procedure is delivered, and the payer landscape relevant to coverage and claims processing. The publication also summarizes benchmarks commonly reviewed for major breast surgery, highlights policy and coding considerations that influence reimbursement and claims adjudication, and provides clinical context for when a mastectomy is coded.

This national-level summary is intended for billing administrators, practice managers, clinical coders, and policy analysts seeking a concise reference on the role of CPT code 19307 in surgical breast care, payer coverage patterns, and the operational settings where the procedure is performed.