HCPCS Level II code B4103 specifies a pediatric enteral formula used to replace fluids and electrolytes (clear-liquid equivalents), billed in 500 ml units. Nationally, this code is relevant for pediatric nutrition management across outpatient, home, and facility-based settings where enteral hydration or electrolyte replacement is required. Use of this code affects coverage determinations, supply billing, and claims processing for pediatric patients needing enteral fluid support.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical intent and common service contexts, plus operational details relevant to billing and claim submission. The publication highlights typical benchmarks for unitization and service settings, summarizes policy and coverage considerations at a national level, and outlines clinical context for when a pediatric enteral fluid formula would be used.

This resource is intended to inform coding professionals, billing teams, and policy analysts about the core definition and usage of B4103, provide clarity on where the service is typically delivered, and signal topics for further payer-specific policy review. Data not available in the input will be noted where applicable.