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8620
§ 4.124a Schedule of ratings—neurological conditions and convulsive disorders.

Peripheral neuropathy (nerve damage)

Nerve damage in limbs (tingling, numbness, weakness) manifesting shortly after exposure

What the rating means

Peripheral neuropathy rated under diagnostic code 8620 is evaluated as neuritis under the diseases of the peripheral nerves section of VA's rating schedule. The rating is based on the degree of paralysis of the sciatic nerve under diagnostic code 8520, because neuritis is rated the same way as the underlying nerve's paralysis formula. The possible ratings are 10%, 20%, 40%, 60%, and 80%. An 80% rating reflects complete paralysis, meaning the foot dangles and drops, no active movement is possible in muscles below the knee, and flexion of the knee is weakened or lost. A 60% rating reflects incomplete paralysis that is severe, with marked muscular atrophy. A 40% rating reflects moderately severe incomplete paralysis. A 20% rating reflects moderate incomplete paralysis, and 10% reflects mild incomplete paralysis. When the condition is wholly sensory, the regulation limits the rating to no higher than mild or, at most, moderate. These ratings apply to one side; if both sides are affected, VA combines the ratings and applies the bilateral factor.

Evidence that helps

Medical records that document the degree of nerve and muscle involvement are central to supporting a rating. Nerve conduction studies and electromyography results showing the extent of nerve damage, muscle weakness, or atrophy directly tie to the criteria separating each rating level. Physical examination findings that describe whether you have any active movement below the knee, how much strength remains in the foot and lower leg, and whether muscular atrophy is present help establish whether paralysis is complete or incomplete and at what degree. For ratings in the moderate to severe incomplete range, records showing measurable muscle wasting are particularly relevant. Because wholly sensory involvement is capped at mild or moderate under the regulation, records that document motor findings alongside sensory symptoms carry more weight at the higher levels. Statements from you or people who know you describing how weakness, foot drop, or other functional losses affect your ability to walk, work, or carry out daily tasks can help show real-world impact that corresponds to the criteria at each level.

Secondary conditions

Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.