CPT code 47420 represents surgical exploration and incision of the common bile duct, a procedure used to examine the duct, remove obstructing stones, or place a drainage tube to restore biliary flow. Nationally, this code is relevant for hospitals and surgical centers managing biliary obstruction, choledocholithiasis, and related complications that require operative intervention. Payers commonly covering services associated with this code include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

This publication provides a concise overview of clinical context and billing considerations for CPT code 47420. Readers will find benchmarks and typical reimbursement context where available, a summary of payer coverage patterns, and notes on clinical indications and procedural settings. The content highlights how the procedure is performed, typical sites of service, and the operational implications for surgical teams and revenue cycle departments. Data not available in the input is explicitly noted where applicable. The goal is to give clinicians, coding professionals, and payers a clear national-level briefing on the code’s clinical purpose and administrative considerations without state-specific references.