CPT code 99466 documents in-person clinical accompaniment and care of a critically ill or injured child aged two years or younger during transport between healthcare facilities. This code captures a high-acuity, time-sensitive service that supports safe interfacility transfers for pediatric patients requiring continuous clinical oversight. Nationally, recognition and correct use of this code matters because it distinguishes critical transport accompaniment from routine transport or facility-based critical care, affecting clinical documentation and claim adjudication.

Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for 99466, common billing considerations, and the types of benchmarks and policy topics typically reviewed for interfacility pediatric transport services. The publication also outlines typical sites of service and the service type associated with this code.

The content provides operational clarity for coding teams, revenue integrity staff, and clinicians involved in pediatric interfacility transfers. It highlights areas where documentation should reflect continuous in-person clinical care during transport, and it points to the kinds of payer policies and reimbursement scenarios that organizations commonly examine when evaluating use of 99466.