Diagnostic Code 8521 · 38 CFR §4.124a
Peripheral neuropathy of the lower extremities affects the nerves in your legs and feet, causing numbness, tingling, burning pain, weakness, and balance problems. Walking may become difficult, and you might not feel injuries to your feet. This is extremely common among veterans with diabetes and those exposed to Agent Orange or other toxic substances. DC 8521 covers the external popliteal (common peroneal) nerve, which is one of the most commonly affected nerves in the lower extremity, but other codes may apply depending on which nerve is damaged.
| Rating | Criteria |
|---|---|
| 10% | Mild incomplete paralysis. You have numbness or tingling in your feet and lower legs but can still walk normally. You may notice reduced sensation but your muscle strength is mostly intact. |
| 20% | Moderate incomplete paralysis. The numbness and pain are more pronounced. You may have difficulty with balance, occasional stumbling, or noticeable weakness in your foot — such as difficulty lifting it (foot drop tendency). Walking on uneven surfaces becomes challenging. |
| 30% | Severe incomplete paralysis. You have significant weakness in the affected leg, marked balance impairment, and considerable pain or numbness. Walking without assistive devices may be unsafe. You may have partial foot drop. |
| 40% | Complete paralysis of the affected nerve. The foot hangs and drops with no active movement possible in the muscles below the knee. You have lost function of the foot and require bracing or an assistive device to walk. |
EMG and nerve conduction studies documenting the nerve damage are essential. Balance testing or gait analysis from your doctor supports the functional impact. Treatment records showing medications for neuropathic pain (gabapentin, pregabalin, duloxetine) help document severity. If you use a cane, brace, or other assistive device, make sure it is prescribed and in your medical records.
Early-onset peripheral neuropathy was added as a presumptive condition for Agent Orange exposure. The VA has specific criteria regarding when symptoms must have appeared. Check the current presumptive list for your service dates.
It depends on whether different nerves are involved. If your sciatic nerve (DC 8520) and peroneal nerve (DC 8521) are both damaged with distinct symptoms, separate ratings may be appropriate. However, the VA will not rate overlapping symptoms twice.
Nighttime worsening is very common with peripheral neuropathy and should be documented. It affects your sleep quality and overall functioning. Mention this to your examiner and to your treating doctor so it appears in your records. Sleep disruption from neuropathic pain may also support a secondary claim for a sleep disorder.