CPT code 33981 identifies surgical replacement of the pump component in a previously implanted ventricular assist device (VAD), applicable to one or both ventricles. This procedure is a specialized cardiac surgical intervention performed when pump malfunction, infection, or device failure requires removal of the existing pump and installation of a new pump. Nationally, VAD pump replacement is clinically significant due to its implications for high-acuity inpatient care, device lifespan, and perioperative resource use.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for CPT code 33981, typical sites of service, and the kinds of benchmarks and policy considerations that commonly accompany high-acuity device revision procedures.

The publication provides: operational benchmarks related to service lines that manage VAD care, common billing and modifier patterns encountered with complex cardiac device procedures, and an outline of policy and coverage themes payers address for durable mechanical circulatory support. Where input data is incomplete, the report notes "Data not available in the input." The intent is to give clinicians, billing professionals, and policy analysts a clear, national-level reference for the clinical and administrative characteristics of CPT code 33981.