CPT code 64823 denotes surgical removal or destruction of the sympathetic nerves supplying the superficial palmar arch of the hand, a targeted intervention to relieve ischemic pain and improve distal blood flow in patients with vasospastic or occlusive conditions. Nationally, this procedure matters for specialty surgical practice patterns, vascular and pain management pathways, and payer coverage decisions because it addresses limb-threatening ischemia and chronic refractory pain that may not respond to conservative measures. Key payers in the national landscape include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. This publication provides clinicians, coders, and policy professionals with a concise clinical and billing overview of the procedure, expected sites of service, and the typical clinical context in which the code is used. Readers will find benchmarks and policy-relevant commentary about coding clarity, typical utilization settings, and payer considerations where available. Data not available in the input for specific coverage policies, associated taxonomies, ICD-10 diagnoses, and related codes are noted as missing. The focus is national and intended to support coding accuracy, clinical documentation alignment, and payer engagement for procedures addressing hand ischemia and sympathetically mediated pain.