CPT code 49400 designates the injection of air or contrast material into the abdominal cavity to improve visualization of intra‑abdominal organs on a separately performed radiologic study. This technique supports diagnostic imaging by creating intraperitoneal contrast that can reveal organ contours, fluid collections, or leaks not otherwise visible. Nationally, the code is relevant for hospitals and outpatient imaging centers that perform advanced diagnostic procedures involving radiologic guidance. Payers commonly involved in coverage and reimbursement for this service include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

This publication provides a concise briefing on clinical context and billing considerations for CPT code 49400. Readers will find an overview of the procedure’s clinical purpose and typical settings of service, a summary of common payer coverage considerations, and references to related billing elements where available. The report aims to clarify coding intent and situational use so that revenue cycle and clinical teams can locate applicable guidance quickly. Data not available in the input is noted where relevant, and readers will receive a high‑level orientation to follow‑on materials that address benchmarks, policy updates, and payer‑specific documentation expectations.