How VA rates radiculopathy
VA evaluates the specific nerve and documented functional impairment. Paralysis, neuritis, and neuralgia have distinct rules. The example below is DC 8520 for the sciatic nerve only; it is not a universal radiculopathy scale. Major/minor distinctions in applicable upper-limb codes do not create a dominant-leg bonus.
Rating criteria from the tool data
| Rating | What VA looks for |
|---|---|
| 10% | DC 8520 example: mild incomplete sciatic paralysis. |
| 20% | DC 8520 example: moderate incomplete sciatic paralysis. |
| 40% | DC 8520 example: moderately severe incomplete sciatic paralysis. |
| 60% | DC 8520 example: severe incomplete sciatic paralysis with marked muscular atrophy. |
| 80% | DC 8520 example: complete sciatic paralysis; foot dangles and drops, no active movement possible below the knee, and knee flexion weakened or, very rarely, lost. |
Clinical findings needed
Not estimated: the affected nerve, side, diagnosis, and clinical severity must be identified. There is no single radiculopathy percentage table for every arm and leg.
What may happen in the exam room
- Clinical assessment of motor, sensory, reflex, and trophic findings.
- Identification of the nerve and side involved; review of relevant diagnostic testing.
Measurements and findings to understand
- Strength, reflexes, sensory changes, muscle atrophy, and functional limitations.
- Whether involvement is wholly sensory and how the applicable code addresses it.
Questions the examiner may cover
- Where do symptoms travel, and on which side?
- What weakness, numbness, or functional change have you noticed?
- Which nerve or diagnosis is identified in your clinical records?
Functional-impact language to think through
Use plain, truthful wording that matches your records and daily limitations. These examples are prompts for accuracy, not scripts.
- Describe the actual distribution and effect on tasks or walking.
- Report symptoms on each side separately without assuming all symptoms share one cause.
Common mistakes to avoid
- Treating every nerve as the sciatic nerve.
- Equating a pain score or foot drop alone with a complete-paralysis percentage.
- Adding percentages for overlapping nerve manifestations without review.
Evidence to organize before the exam
- Neurological examination and treatment records.
- Relevant imaging or electrodiagnostic reports when available.
- Clinical findings identifying the nerve, side, and impairment.
Preparation notes
- Wholly sensory involvement is generally evaluated as mild, or at most moderate, under the peripheral-nerve guidance; the specific code and clinical record still matter.
- A nerve diagnosis and any proposed relationship to a spine condition need medical evidence.
Official rating source
38 CFR 4.120, 4.123, 4.124 and 4.124a. Checked 2026-09-04. Educational preparation only; not a personal rating.
How secondary service connection works
A secondary condition is not automatic. The evidence must connect a current diagnosed disability to an already service-connected condition or its medically indicated treatment.
- Basic evidence: a current diagnosis, an already service-connected primary condition, and competent evidence linking the two.
- Two theories: the primary condition or its treatment caused the new disability under 38 CFR § 3.310(a), or aggravated a pre-existing non-service-connected disability under § 3.310(b). An opinion should address both when the record raises both; causation alone may be inadequate (El-Amin).
- Treatment pathway: service-connected condition → medically indicated medication or surgery → documented adverse effect → current diagnosis. Pharmacy records, start and stop dates, and a treating clinician’s reasoning matter; medication use alone does not establish the connection.
- Weight as an intermediate step: obesity or weight gain can be part of the causal chain under VAOPGCPREC 1-2017, but obesity itself is not a disability for a VA rating.
- Standard of proof: VA applies the “at least as likely as not” standard and reasonable-doubt rule under 38 CFR § 3.102. This guide identifies evidence questions; it does not tell you what to file.
- Avoid pyramiding: 38 CFR § 4.14 prohibits rating the same manifestation twice. Mental-health diagnoses generally use one § 4.130 evaluation for the same occupational and social impairment, and insomnia may be a symptom rather than a separate disability.
- Presumptives are different: qualifying service may make chronic rhinitis, chronic sinusitis, hypertension associated with herbicide exposure, or type 2 diabetes presumptive. OSA is not a PACT Act presumptive. Check current eligibility before seeking nexus evidence for a condition the law may already presume.
- DBQ is not a nexus: a DBQ documents diagnosis and severity; it does not necessarily establish service connection. A VA-accredited VSO can help with filing strategy at no charge.
Other medically indicated treatments for a service-connected condition may support a secondary theory when a clinician documents the adverse effect in this veteran.
Sources: 38 CFR § 3.310 · 38 CFR § 4.14 · VA-accredited representatives
Possible secondary conditions to discuss with a qualified reviewer
These are educational issue-spotting notes, not medical nexus opinions. VA decides service connection.
Motor weakness may affect evaluation under the applicable nerve code; document strength and function.
Objective atrophy can be relevant to severity and should be measured.
Review only with a distinct diagnosis and medical nexus.
Document nighttime symptoms as functional impact; do not assume a separate disability.