Condition Rating Guides
How VA Rates Sciatica: DC 8520 Sciatic Nerve Paralysis and Radiculopathy Guide
The VA evaluates sciatica under 38 CFR 4.124a, Diagnostic Code 8520 for sciatic nerve paralysis. Ratings range from 10% to 80% based on whether nerve impairment is mild, moderate, moderately severe, severe, or complete, and whether one or both legs are affected.
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Diagnostic Code 8520 rating tiers
Sciatica involves compression or irritation of the sciatic nerve trunk (originating from lumbar nerve roots L4 through S3). DC 8520 rates sciatic paralysis in five stages: 10% for mild incomplete paralysis (slight sensory changes or mild reflex alterations); 20% for moderate incomplete paralysis (moderate pain, sensory deficits, or motor weakness); 40% for moderately severe incomplete paralysis; 60% for severe incomplete paralysis with marked foot drop and muscle atrophy; and 80% for complete paralysis.
Neuritis and neuralgia alternatives
In addition to paralysis under DC 8520, the VA provides Diagnostic Code 8620 for sciatic neuritis and DC 8720 for sciatic neuralgia. Neuralgia is rated at 10% for mild or 20% for moderate tingling and burning sensations, while neuritis addresses chronic inflammatory nerve injury. However, ratings cannot be duplicated across these codes for the same limb under the anti-pyramiding rule (38 CFR 4.14).
Secondary connection to lumbar spine conditions
Sciatica is most frequently claimed as a secondary service connection resulting from service-connected lumbar spine injuries, such as herniated discs, spinal stenosis, or degenerative disc disease. Because nerve root compression represents a distinct neurological impairment separate from spinal range of motion limitations, sciatica is rated independently alongside the back rating.
The bilateral factor for sciatica
Many veterans suffer from bilateral sciatica, experiencing radiating pain, numbness, and tingling down both the left and right legs. When sciatica is service-connected in both lower extremities, the VA combines their evaluations and adds the 10% bilateral factor under 38 CFR 4.26, boosting the veteran's combined rating before final rounding.
Medical evidence and examination findings
Essential evidence includes a Peripheral Nerves DBQ detailing sensory loss (sharp versus dull testing), deep tendon reflex changes (Achilles and patellar reflexes), and muscle strength grading (such as weakness during dorsiflexion or toe walking). Electromyogram (EMG) and nerve conduction studies (NCS) provide definitive objective proof of radiculopathy.
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