Diagnostic Code 8515 · 38 CFR §4.124a
Carpal tunnel syndrome (CTS) is compression of the median nerve as it passes through the carpal tunnel in the wrist. The VA rates CTS under DC 8515, which covers paralysis of the median nerve. Veterans commonly develop CTS from repetitive hand and wrist motions during service — typing, operating equipment, using tools, weapons maintenance, or driving military vehicles. Symptoms include numbness and tingling in the thumb, index, middle, and ring fingers, pain in the wrist and hand, weakness in grip strength, and difficulty with fine motor tasks. The VA assigns different rating percentages depending on whether the affected hand is the dominant (major) or non-dominant (minor) extremity.
| Rating | Criteria |
|---|---|
| 10% | Mild incomplete paralysis of the median nerve. Same rating for both major and minor extremity. Intermittent numbness, tingling, or pain with minimal functional limitation. Grip strength is largely preserved. |
| 30% | Moderate incomplete paralysis of the median nerve in the major (dominant) hand. Regular symptoms with noticeable weakness, frequent numbness, and moderate difficulty with gripping, writing, or fine motor tasks. |
| 20% | Moderate incomplete paralysis in the minor (non-dominant) hand. Same symptom profile as the 30% rating but affecting the non-dominant hand. |
| 50% | Severe incomplete paralysis in the major hand. Significant weakness, persistent numbness, and substantial difficulty with hand function. Fine motor tasks and grip strength are markedly impaired. |
| 40% | Severe incomplete paralysis in the minor hand. Same severity as the 50% level but in the non-dominant hand. |
| 70% | Complete paralysis of the median nerve in the major hand. The hand is inclined to the ulnar side, the index and middle fingers are more extended than normal, there is inability to flex the distal phalanx of the thumb, and there is weakened wrist flexion. |
| 60% | Complete paralysis of the median nerve in the minor hand. Same presentation as the 70% rating but in the non-dominant hand. |
Nerve conduction studies (NCS) and electromyography (EMG) provide the strongest objective evidence for carpal tunnel syndrome. These tests measure the speed of electrical signals through the median nerve and can quantify the degree of nerve compression. Medical records showing a diagnosis of CTS, treatment history (wrist splints, steroid injections, or surgery), and documentation of ongoing symptoms are important. If claiming direct service connection, evidence of repetitive hand/wrist activities during service is needed — your MOS description, duty assignments, or buddy statements describing the work. Service treatment records showing complaints of hand or wrist symptoms during service strengthen the claim significantly.
Yes. The VA assigns higher ratings for the dominant (major) hand at the moderate, severe, and complete paralysis levels. For example, moderate incomplete paralysis is rated at 30% for the dominant hand but 20% for the non-dominant hand. At the mild level, both hands receive 10%.
Yes. If you have CTS in both hands, each is evaluated and rated separately. The two ratings are then combined using VA math. Claim each hand as a separate condition on your application.
Yes. Many veterans have residual symptoms after carpal tunnel release surgery, including continued numbness, reduced grip strength, or scar pain. These residuals are still ratable. The VA evaluates your current level of impairment regardless of whether you have had surgery.
DC 8515 covers paralysis of the median nerve (motor and sensory impairment). DC 8615 covers neuritis (inflammation) and DC 8715 covers neuralgia (pain). The neuritis and neuralgia codes have the same rating structure but may be applied when the primary manifestation is inflammation or pain rather than nerve paralysis.