CPT code 49427 identifies a diagnostic procedure in which contrast is injected into the reservoir of an existing peritoneal venous shunt in the peritoneal cavity to evaluate flow through the device. The code captures a targeted imaging intervention used to assess shunt patency and function, which influences subsequent clinical management such as revision, replacement, or conservative monitoring. Nationally, this procedure is relevant across hospital outpatient departments and imaging centers where patients with implanted shunts receive follow-up and diagnostic care.

Key payers included in typical coverage discussions are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical purpose of the code, common sites of service, and the payer landscape. The publication outlines standard billing context, commonly reported modifiers (provided in the input), and areas where coding clarity matters for claims adjudication.

This article provides clinicians, coders, and billing professionals with concise benchmarking context, clinical interpretation of the service, and policy-relevant notes on coding practice. Data not available in the input is identified where applicable, and readers will learn where to look for payer-specific edits, coverage criteria, and claim documentation expectations.