How VA Rates Peripheral Neuropathy: Upper and Lower Extremity Nerve Damage Guide

Under 38 CFR 4.124a, the VA categorizes nerve disorders into three distinct pathological groups: paralysis (loss of voluntary movement or sensation), neuritis (chronic nerve inflammation with muscle wasting and reflex loss), and neuralgia (pain, tingling, or numbness without motor paralysis). Each nerve in the arm or leg has dedicated diagnostic codes under each classification.

Lower body neuropathy commonly impacts the sciatic nerve (DC 8520), external popliteal/peroneal nerve (DC 8521), or internal popliteal/tibial nerve (DC 8522). Ratings range from 10% for mild sensory disturbance up to 80% for complete sciatic paralysis with foot drop. Moderate sciatic nerve impairment is typically rated at 20%, while moderately severe impairment warrants 40%.

Arm and hand neuropathy involves the median nerve (DC 8515, associated with carpal tunnel syndrome), radial nerve (DC 8514), and ulnar nerve (DC 8516, cubital tunnel syndrome). Upper extremity ratings differentiate between the major (dominant) and minor (non-dominant) arm. For example, severe median nerve paralysis is rated 70% in the major arm and 50% in the minor arm.

Peripheral neuropathy is frequently claimed as secondary to other service-connected conditions. Type 2 diabetes mellitus often causes diabetic peripheral neuropathy affecting both feet and hands. Spinal disc herniations cause radiculopathy affecting nerve roots. Additionally, chemotherapy treatment for service-connected cancers frequently induces severe peripheral neuropathy.

Objective electrodiagnostic testing, including electromyography (EMG) and nerve conduction velocity (NCV) studies, establishes the presence and severity of axonal damage. When neuropathy affects both lower extremities or both upper extremities, the VA must combine the ratings using the Bilateral Factor (38 CFR 4.26), adding a 10% bonus before final rounding.