CPT code 58146 represents an open abdominal myomectomy for removal of five or more uterine fibroids with a combined tumor weight exceeding 250 grams. This code captures a higher-complexity gynecologic procedure that typically involves greater operative time, increased resource use, and potential inpatient care compared with less extensive myomectomies. Nationally, accurate coding for extensive myomectomy is important for clinical reporting, care coordination, and payer adjudication given differences in coverage policies and site-of-service determinations. Major payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will learn the clinical context of 58146, the expected site-of-service and service type, common billing modifiers and related administrative considerations, and where this code fits among related myomectomy codes. The publication summarizes payer coverage patterns and authorization nuances at a national level, highlights documentation elements relevant to case complexity, and outlines benchmarks and coding relationships to aid revenue cycle and clinical teams. Data not available in the input is noted where applicable.