CPT code 43846 represents Roux-en-Y gastric bypass, a major bariatric surgery used to treat severe obesity. Nationally, this procedure is a focal point for surgical weight-loss programs, payer coverage policies, and outcomes-focused quality measures because it carries significant clinical benefit for eligible patients but also involves substantial perioperative risk and cost. Coverage, prior-authorization requirements, and utilization management for this procedure vary across major national payers.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of payer coverage approaches, typical sites of service, and common billing considerations for inpatient bariatric surgery. The publication also summarizes clinical context for Roux-en-Y gastric bypass, typical care pathways surrounding the operation, and where readers can expect to find benchmarks such as utilization rates, authorization patterns, and postoperative follow-up expectations when available.

This piece provides concise operational and policy-focused information for billing, coding, and administrative teams, as well as clinical leaders seeking clarity on the role of CPT code 43846 in national bariatric care delivery. Data not available in the input will be noted where applicable.