CPT code 33949 denotes the daily management of veno–arterial (VA) ECMO/ECLS circulation for patients on extracorporeal support. This code captures ongoing clinical oversight of complex life-support systems used in severe cardiopulmonary failure, acute respiratory distress syndrome (ARDS), and as a bridge for lung transplantation. It matters nationally because ECMO and ECLS are resource-intensive, requiring specialized staff, continuous monitoring, and significant hospital-level infrastructure; accurate coding supports clinical documentation, resource planning, and payer alignment for high-acuity care.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical context and where this service is typically delivered, an overview of common modifiers associated with billing for complex procedures, and guidance on topics commonly relevant to stakeholders such as coverage patterns, documentation expectations, and benchmarking considerations. The publication aims to orient clinicians, coders, and policy analysts to the clinical intent of the code, its placement within critical care service lines, and the types of payer interactions and policy issues that commonly arise with extracorporeal support billing.

Data not available in the input: associated taxonomies, specific ICD-10 diagnosis mappings, related codes, and payer-specific payment rates.