Peripheral Neuropathy Secondary to Diabetes: VA Disability Claim Guide

Overview

Peripheral neuropathy is damage to the nerves outside the brain and spinal cord, usually in the feet and hands. It is one of the most common complications of diabetes; NIDDK reports that about one-third to one-half of people with diabetes have it.

Under 38 CFR § 3.310, veterans with service-connected diabetes can claim peripheral neuropathy as a secondary condition when the nerve damage is caused by their diabetic condition. Note (1) to the diabetes rating code (DC 7913) says compensable complications of diabetes are evaluated separately, unless they are part of the criteria used to support a 100% diabetes rating. Noncompensable complications are considered part of the diabetic process.

Because each affected extremity is rated separately, and the bilateral factor applies when paired extremities are affected, neuropathy can raise a combined rating substantially. The examples below show the math.

How Peripheral Neuropathy Is Connected to Diabetes

Diabetic peripheral neuropathy is a well-established complication of diabetes. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) reports that about one-third to one-half of people with diabetes have peripheral neuropathy. It typically affects the feet and legs first and sometimes the hands and arms.

How the damage happens. Over time, high blood glucose and related metabolic changes injure peripheral nerves and the small blood vessels that supply them. The longest nerves are affected first, which is why symptoms usually start in the toes and feet and move upward in a “stocking-glove” pattern (distal symmetric polyneuropathy).

Glucose control changes the risk. In the Diabetes Control and Complications Trial (DCCT, New England Journal of Medicine, 1993), intensive glucose control in type 1 diabetes reduced clinical neuropathy by 60% compared with conventional treatment. That is direct evidence that the nerve damage is driven by the diabetes.

Other causes the examiner will consider. Neuropathy can also come from alcohol use, vitamin B12 deficiency (including from long-term metformin use), thyroid disease, chemotherapy, toxic exposures, and spinal nerve compression (radiculopathy). A symmetric, length-dependent pattern in a veteran with long-standing diabetes supports a diabetic cause. The opinion should address any competing causes in your record.

Evidence Requirements

To establish secondary service connection for peripheral neuropathy, you need clear documentation of both the condition and its link to diabetes:

• Current peripheral neuropathy diagnosis: A formal diagnosis from a neurologist or your treating physician specifying the type (sensory, motor, or sensorimotor) and distribution (which extremities are affected).
• Nerve conduction study (NCS) or electromyography (EMG): Electrodiagnostic testing that objectively documents nerve damage, identifies affected nerves, and quantifies severity. These tests are particularly valuable because they provide measurable data the VA can use to determine rating levels.
• Service-connected diabetes mellitus documentation: Your VA rating decision confirming diabetes mellitus type II is service-connected.
• HbA1c records: Hemoglobin A1c test results over time. These demonstrate your blood sugar control history and help establish that chronic hyperglycemia contributed to nerve damage. Elevated HbA1c levels support the diabetes-neuropathy nexus.
• Medical opinion: A physician’s opinion that your peripheral neuropathy is at least as likely as not caused by, or aggravated by, your service-connected diabetes. It should address other possible causes in your record.
• Treatment records: Documentation of neuropathy symptoms, prescriptions for neuropathic pain medications (gabapentin, pregabalin, duloxetine, amitriptyline), physical therapy, and any diabetic foot care.
• Neuropathy symptom documentation: Records describing numbness, tingling, burning pain, loss of sensation, muscle weakness, balance problems, and any falls or injuries resulting from neuropathy.
• Monofilament testing results: If your doctor has performed Semmes-Weinstein monofilament testing (a standard screening for diabetic neuropathy), these results provide additional objective evidence.

Nexus Letter Tips

The diabetes-neuropathy link is medically straightforward, so the opinion can be short. Its job is to attribute your neuropathy to diabetes and deal with other possible causes.

Who should write it: A neurologist, endocrinologist, or primary care physician who manages your diabetes and knows your history.

What it should say: The letter should state whether your peripheral neuropathy is “at least as likely as not” caused by your service-connected diabetes mellitus, and separately whether diabetes aggravated it if another cause also contributed (El-Amin v. Shinseki, 26 Vet. App. 136 (2013)). Specifically:

1. State the provider’s credentials and relevant expertise
2. Confirm they reviewed your medical records, including HbA1c history and electrodiagnostic testing
3. Document your peripheral neuropathy diagnosis, specifying affected extremities and type (sensory, motor, or mixed)
4. Explain the mechanism briefly: chronic hyperglycemia damaging peripheral nerves and their small blood vessels
5. Reference your HbA1c history showing periods of elevated blood sugar
6. Note that your neuropathy follows the classic distal symmetric pattern consistent with diabetic etiology
7. Cite recognized sources such as NIDDK guidance and the DCCT results
8. Use the correct legal standard: “at least as likely as not”
9. If applicable, address and rule out other potential causes of neuropathy (alcohol use, vitamin deficiencies, other toxic exposures)

What makes it persuasive: An opinion that ties the recognized diabetes-neuropathy link to your A1C history, your symmetric distal pattern, and any electrodiagnostic results, and that addresses competing causes, gives the rater a clear basis to grant.

Rating Criteria for Peripheral Neuropathy

The VA rates peripheral neuropathy under the diagnostic codes for the specific nerves affected. For lower extremity neuropathy, the most common codes are:

DC 8520 — Paralysis of the Sciatic Nerve (lower extremity):

• 10% — Mild incomplete paralysis
• 20% — Moderate incomplete paralysis
• 40% — Moderately severe incomplete paralysis
• 60% — Severe incomplete paralysis with marked muscular atrophy
• 80% — Complete paralysis

DC 8515 — Paralysis of the Median Nerve (upper extremity, dominant):

• 10% — Mild incomplete paralysis
• 30% — Moderate incomplete paralysis (dominant hand)
• 50% — Severe incomplete paralysis (dominant hand)
• 70% — Complete paralysis (dominant hand)

DC 8515 — Paralysis of the Median Nerve (upper extremity, non-dominant):

• 10% — Mild incomplete paralysis
• 20% — Moderate incomplete paralysis
• 40% — Severe incomplete paralysis
• 60% — Complete paralysis

How severity is determined: The rating schedule does not define “mild,” “moderate,” or “severe.” The examiner describes your symptoms and findings (sensation, strength, reflexes, atrophy, and any electrodiagnostic results), and the rater weighs all the evidence (38 CFR 4.2 and 4.6). In general, symptoms limited to numbness, tingling, or pain point toward the lower levels. Documented weakness, reflex loss, or atrophy is what supports the higher levels.

Sensory-only neuropathy is capped. The peripheral nerve rules in 38 CFR § 4.124a say: “When the involvement is wholly sensory, the rating should be for the mild, or at most, the moderate degree.” Diabetic neuropathy that causes only numbness, tingling, burning, or loss of sensation — without muscle weakness, atrophy, or other motor loss — is generally rated at the mild or moderate level (for example, 10% or 20% per leg under DC 8520). The moderately severe (40%) and higher levels require motor involvement.

Critical point: Each affected extremity is rated separately. A veteran with moderate neuropathy in both lower extremities would receive 20% for the left leg and 20% for the right leg. VA also avoids rating the same nerve symptoms twice (38 CFR 4.14). For example, if a leg is already rated for radiculopathy from a back condition, neuropathy symptoms in that leg must be separated from the radiculopathy symptoms.

How to File This Secondary Claim

Follow these steps to file your peripheral neuropathy secondary claim:

1. Confirm your diabetes is service-connected. You must have an active service-connected rating for diabetes mellitus.

2. Obtain diagnostic testing. Request a nerve conduction study and/or EMG from a neurologist. Also gather your HbA1c history from your primary care provider.

3. Get a formal neuropathy diagnosis. Ensure your medical records contain a clear diagnosis specifying which extremities are affected and the type of neuropathy.

4. Obtain a nexus letter. Have a physician provide a written opinion linking your neuropathy to your diabetes through established metabolic mechanisms.

5. File VA Form 21-526EZ. Submit online at va.gov, by mail, or in person. List each affected extremity as a separate condition, each secondary to your service-connected diabetes mellitus.

6. Describe the secondary relationship for each extremity. Example: “Peripheral neuropathy of the left lower extremity secondary to service-connected diabetes mellitus type II. Chronic hyperglycemia has caused nerve damage in the distal symmetric polyneuropathy pattern.”

7. Upload all supporting evidence. Include your nexus letter, NCS/EMG results, HbA1c records, treatment records, and personal statements.

8. Attend the C&P examination. The VA will schedule a peripheral nerves examination that includes sensory testing, motor strength testing, and reflex evaluation.

9. Track your claim through va.gov or by calling 1-800-827-1000.

C&P Exam Tips

The peripheral neuropathy C&P exam involves detailed neurological testing. Here is how to prepare:

• Report all affected extremities. If you have symptoms in your feet, hands, or all four extremities, make sure the examiner evaluates each one. Do not assume they will test everything automatically.
• Describe all symptoms. Report numbness, tingling, burning, shooting pain, loss of sensation, muscle weakness, cramping, balance problems, and any difficulty with fine motor tasks (buttoning shirts, gripping objects).
• Mention functional impacts. Describe how neuropathy affects your daily life — difficulty walking on uneven surfaces, inability to feel temperature or pain in your feet (creating safety concerns), dropping objects, and any falls you have experienced.
• Describe typical and worse days. Neuropathy symptoms can fluctuate. Describe how you are on a typical day and during flare-ups, not just how you feel at the moment of the exam.
• Discuss foot care issues. If you have had foot ulcers, infections, or injuries you did not feel due to neuropathy, report these. They demonstrate the severity of sensory loss.
• List all medications. Report every medication for neuropathic pain, including gabapentin, pregabalin, duloxetine, and any topical treatments. Mention side effects that affect your functioning.
• Be honest during testing. The examiner will test sensation with monofilaments, pinprick, vibration, and temperature. They will test reflexes and muscle strength. Respond honestly to each test — do not try to perform better or worse than your actual capability.
• Bring your records. Have copies of your NCS/EMG results, HbA1c history, and nexus letter available.

Impact on Combined Rating

Because each extremity is rated separately and the bilateral factor applies to paired extremities, neuropathy ratings can raise a combined rating substantially. Each step below uses 38 CFR 4.25 table values.

Example scenario — bilateral lower extremity neuropathy: A veteran has a 20% rating for diabetes and receives 20% for moderate neuropathy in each leg.

1. Combine the two legs first: 20% combined with 20% = 36
2. Add the bilateral factor (38 CFR 4.26), 10% of 36 = 3.6: 36 + 3.6 = 39.6, treated as 40
3. 40 combined with 20% diabetes = 52
4. 52 rounds to 50%

Example scenario — all four extremities affected: A veteran has 20% for diabetes, 20% for each lower extremity, and 10% for each upper extremity.

When both arms and both legs are affected, 38 CFR 4.26(b) says to combine all four extremity ratings together and apply the bilateral factor once:

1. Four extremities in order of severity: 20% combined with 20% = 36; 36 combined with 10% = 42; 42 combined with 10% = 48
2. Add the bilateral factor, 10% of 48 = 4.8: 48 + 4.8 = 52.8, treated as 53
3. 53 combined with 20% diabetes = 62
4. 62 rounds to 60%

For a single veteran with no dependents in 2026, that is the difference between $356.66 per month at 20% and $1,435.02 per month at 60%. Use our VA disability calculator to check your own numbers; it applies the bilateral factor when you mark the affected limbs.

For personalized guidance on your VA disability claim, consult a VA-accredited VSO, attorney, or claims agent.