CPT code 64831 denotes surgical repair of a peripheral digital nerve in a finger or toe to restore sensory and/or motor function after traumatic injury. This code captures a focused microsurgical procedure commonly performed by hand and peripheral nerve surgeons and is critical to functional recovery, patient quality of life, and downstream rehabilitation needs. Nationally, timely repair influences outcomes and utilization of follow-up services including therapy and potential secondary procedures.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the code, the typical care setting, and what to expect in coverage and billing workflows. The publication summarizes available benchmarks and common modifier usage patterns where documented, highlights payer differences in prior authorization and medical necessity expectations when present, and outlines implications for surgical and post‑operative billing lines.

The report is intended for billing managers, surgical providers, and policy analysts seeking a national overview of CPT code 64831 — covering clinical purpose, service setting, payer considerations, and items to review in claims and appeals. Data not available in the input will be noted where applicable.