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8720
§ 4.124a Schedule of ratings—neurological conditions and convulsive disorders.

Sciatic nerve pain (neuralgia)

Nerve pain affecting the sciatic nerve, which runs from the lower back through the leg and may cause sharp or radiating pain.

What the rating means

VA rates sciatic nerve neuralgia under diagnostic code 8720. Because neuralgia of the sciatic nerve involves sensory symptoms rather than full loss of motor function, the regulation states that a wholly sensory condition should be rated at the mild or, at most, the moderate degree. The ratings are based on the paralysis scale for the sciatic nerve (code 8520), which sets five levels: 10% for mild incomplete paralysis, 20% for moderate incomplete paralysis, 40% for moderately severe incomplete paralysis, 60% for severe incomplete paralysis with marked muscular atrophy, and 80% for complete paralysis where the foot dangles and drops, no active movement is possible in the muscles below the knee, and flexion of the knee is weakened or lost. The ratings apply to one side; if both sciatic nerves are affected, VA combines the ratings and applies the bilateral factor.

Evidence that helps

Because neuralgia is a sensory condition, records that document the nature and degree of your pain and sensory loss are central. Medical records showing findings on physical examination — such as reduced sensation, tenderness along the nerve, or reflex changes — help establish how far symptoms have progressed. Imaging or electrodiagnostic studies (such as nerve conduction tests or MRI) that identify nerve involvement or rule out complete motor loss support the sensory basis of the condition. At higher levels of incomplete paralysis, records documenting any weakness below the knee or muscle changes become relevant, even if full paralysis is not present. Statements from you or people who live or work with you describing how pain limits walking, standing, sitting for extended periods, or carrying out work duties help show functional impact. Treatment records reflecting ongoing pain management also reflect the persistence and severity of your symptoms.

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.