CPT code 77066 represents bilateral diagnostic mammography for patients with a breast lump or suspected cancer and may include computer‑aided detection (CAD) that converts signals into digital data and assists image analysis. This code is widely used in breast imaging workflows and is important for timely cancer diagnosis, triage of palpable findings, and coordination between radiology and breast specialty services. Nationally, diagnostic mammography is a common, high‑value imaging service with implications for quality measures and screening follow‑up.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find benchmarks for utilization and reimbursement patterns, a summary of coding and clinical context for diagnostic mammography with CAD, and notes on payer coverage trends and common modifiers that affect billing. The publication outlines how CPT code 77066 fits into mammography service lines, expected sites of service, and the clinical scenarios that trigger its use. Data not available in the input are noted where applicable.