HCPCS Level II code B4153 denotes a nutritionally complete enteral formula composed of hydrolyzed proteins (amino acids and peptide chains) with fats, carbohydrates, vitamins, and minerals, intended for administration via an enteral feeding tube. This product classification matters nationally because enteral nutrition is critical for patients with impaired oral intake or malabsorption and hydrolyzed-protein formulas are often used for complex clinical needs such as severe food protein intolerance, malabsorption syndromes, or critical illness. Payer coverage and reimbursement for enteral formulas affect access to medically necessary nutrition across care settings.

Key payers commonly engaged in coverage and utilization include Aetna, Blue Cross Blue Shield plans, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for hydrolyzed-protein enteral formulas, typical sites of service (home enteral nutrition, hospitals, long-term care), common billing considerations, and where to look for benchmark and policy details. The publication outlines common modifiers and payer considerations provided in the source, notes where input data are missing, and frames the code for use in program administration and claims processing. This summary is written for a national audience and focuses on the code’s clinical and billing role rather than state-specific rules.