HCPCS Level II code S3708 denotes a gastrointestinal fat absorption study, a diagnostic test used to evaluate fat malabsorption and related disorders of digestion. Nationally, this code matters because it identifies services used in the workup of chronic diarrhea, failure to thrive, unexplained weight loss, and conditions such as pancreatic insufficiency and celiac disease, helping clinicians and payers distinguish specialized laboratory testing from routine panels.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for use of the code, typical sites of service, and payer coverage themes. The publication summarizes common billing and coding considerations for S3708, outlines relevant benchmarks where available, and highlights recent policy or coverage updates affecting reimbursement and prior authorization practices.

This resource is intended for billing professionals, coding auditors, and clinical managers seeking a national-level reference for documenting and billing gastrointestinal fat absorption studies. Data not available in the input are indicated where relevant.