CPT code 33953 denotes the open surgical insertion of a peripheral cannula for extracorporeal circulation in children from birth through five years. It captures a specialized pediatric surgical procedure used to establish cardiopulmonary bypass or other extracorporeal support in very young patients. Nationally, accurate coding for 33953 matters for clinical documentation, resource planning, and payment for high-acuity pediatric cardiac and surgical services.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a concise overview of clinical context, common billing considerations, and payer coverage patterns where available. Readers will find benchmarks for utilization and reimbursement (where reported), coding guidance tied to procedure definition, and notes on typical sites of service. The summary also highlights common modifiers and related administrative considerations when present in claims data.

This resource is intended for coding professionals, hospital billing teams, and policy analysts seeking a national perspective on how CPT code 33953 is used and reimbursed across major payers, and what clinical scenarios typically prompt use of this code. Data not available in the input is noted where relevant in accompanying sections.