CPT code 27880 denotes a transtibial (below-knee) amputation — a surgical removal of the leg through the lower leg bones with closure of skin flaps, typically performed to relieve pain or remove nonhealing tissue in the setting of poor vascular supply. This code captures a major limb amputation procedure with significant clinical, functional, and cost implications nationally, given its association with chronic vascular disease, infection, and limb-threatening ischemia.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical description, expected sites of service, and the common payer landscape for this procedure. The analysis highlights benchmarking considerations, common modifier usage, and the clinical context that drives utilization, including indications related to nonhealing tissue and poor perfusion. Policy-relevant topics covered include coverage criteria, authorization patterns, and coding specificity for surgical amputation services.

This publication is intended to inform coding professionals, revenue cycle managers, and clinical leadership about the definition and billing context of CPT code 27880, and to outline where to focus further review for reimbursement, quality measurement, and clinical documentation improvements. Data not available in the input is explicitly noted where applicable.