Peripheral Neuropathy VA Rating: How the VA Evaluates Nerve Damage

Peripheral neuropathy is damage to the nerves outside the brain and spinal cord. It usually starts in the longest nerves, which is why the first symptoms are numbness, burning, or pins and needles in both feet, later spreading to the hands in the stocking-and-glove pattern clinicians describe.

Unlike radiculopathy, which follows a single nerve root, neuropathy is typically symmetric and systemic. That difference shapes both how it is service connected and how it is rated.

How peripheral neuropathy is rated

There is no single neuropathy code. The VA rates the affected nerve under 38 CFR 4.124a, most often the sciatic nerve at Diagnostic Code 8520, the external popliteal nerve at 8521, or the posterior tibial nerve at 8525 in the legs, and the median nerve at 8515 or the ulnar nerve at 8516 in the arms.

Each extremity is rated separately, so a veteran with neuropathy in both feet and both hands can hold four evaluations that combine under 38 CFR 4.25. Our diagnostic codes guide lists the percentages for each nerve.

The wholly sensory ceiling matters here

Most neuropathy claims begin as sensory only, and the note in 38 CFR 4.124a limits wholly sensory involvement to mild, or at most moderate, incomplete paralysis. That is why so many neuropathy grants come in at 10 or 20 percent per extremity.

Progression changes the picture. Weakness on muscle testing, absent ankle reflexes, loss of balance, foot drop, or measurable atrophy support higher levels. Neuropathy is also a progressive condition in many veterans, so an increased rating claim later is often appropriate; our guide on nexus letters and increased rating claims covers how that works.

Neuropathy secondary to diabetes

The most common path to service connection is secondary. Under 38 CFR 3.310, a condition caused or aggravated by an already service-connected disability is service connected in its own right, and peripheral neuropathy is a recognized complication of diabetes mellitus.

When diabetes is already service connected, the opinion supporting a neuropathy claim needs to establish the diagnosis, the distribution of the findings, and the medical reasoning tying the neuropathy to the diabetes rather than to another cause. Our secondary service connection guide explains the standard, and the medication side effects guide covers the related route where treatment rather than the underlying disease causes the harm.

Early-onset peripheral neuropathy and herbicide exposure

Early-onset peripheral neuropathy appears on the list of diseases associated with herbicide exposure in 38 CFR 3.309(e). For veterans with qualifying exposure, that presumption removes the need to prove a medical link, provided the condition meets the regulatory requirements for onset and manifestation.

Exposure claims have their own documentation issues. Our burn pit and toxic exposure guidance in the skin series discusses how exposure claims are evidenced, and the VA's Agent Orange page listed below sets out eligibility.

Other causes the VA will weigh

Neuropathy has many causes: diabetes, alcohol use, vitamin B12 deficiency, chemotherapy, kidney disease, thyroid disease, and idiopathic cases where no cause is found. A rater who sees an alternative explanation in the record and no discussion of it will often deny.

That is precisely the work a well-reasoned medical opinion does. It does not ignore the alternatives; it addresses them and explains why service or the service-connected condition remains at least as likely as not the cause. Our guide on the at least as likely as not standard explains the threshold.

Where to go next

Read the C&P exam guide before your appointment and the evidence guide for what belongs in the file. If neuropathy affects your balance and your feet, our feet and lower legs series covers the related conditions, and the pillar guide explains how nerve ratings fit alongside everything else in a claim.

Idiopathic and other secondary theories

Not every neuropathy claim has a diabetes diagnosis behind it. Neuropathy can also be claimed as secondary to other service-connected conditions where the medical literature and the individual record support a link, such as neuropathy that develops after prolonged use of certain medications prescribed for a service-connected condition, or neuropathy tied to kidney disease that is itself service connected.

In these cases the secondary service connection standard in 38 CFR 3.310 still applies: the claimed condition must be shown to be proximately due to, the result of, or aggravated by the already service-connected disability. A medical opinion addressing the specific mechanism, rather than a general statement that the two conditions are related, is what typically moves these claims forward.

Combining extremity ratings and the bilateral factor

When neuropathy affects paired extremities, such as both feet, the bilateral factor described in the combined ratings rules can add a small additional percentage on top of the combined value of the two individual ratings before the final number is rounded. This is a mechanical step applied during the rating decision itself, not something a veteran has to separately claim.

Because each extremity is evaluated on its own findings, symmetric symptoms do not guarantee identical percentages. One foot may show more advanced sensory loss, a diminished reflex, or measurable atrophy while the other remains mild, and the ratings can differ accordingly even though the underlying diagnosis is the same.

Requesting an increase as neuropathy progresses

Peripheral neuropathy from diabetes or other systemic causes often progresses gradually rather than staying fixed at the level found on the original exam. When strength, reflexes, or gait change for the worse, an increased rating claim supported by updated treatment records is the appropriate step, using the same objective findings, strength grades, reflex testing, and atrophy measurements, that supported the original grant.

Because the wholly sensory ceiling in 38 CFR 4.124a limits sensory-only findings to mild or moderate levels, documenting the transition from sensory symptoms to measurable weakness or atrophy is often the single most important piece of evidence in a neuropathy increase claim.