Carpal Tunnel Syndrome

The VA does not rate carpal tunnel as a wrist problem. It rates carpal tunnel as paralysis of the median nerve under DC 8515 in 38 CFR § 4.124a, graded as incomplete paralysis (mild, moderate, or severe) or complete paralysis, with separate percentage columns for the major (dominant) and minor (non-dominant) hand. The percentages are the same at the mild level and higher for the major hand at the moderate, severe, and complete levels.

That structure produces the three facts that decide these claims. Each service-connected hand is evaluated separately, so bilateral carpal tunnel can produce two ratings plus the bilateral factor. The grade is a clinical judgment built from the full disability picture, and involvement that is wholly sensory is, under the schedule's own note, rated mild or at most moderate. Complete median nerve paralysis on the dominant hand rates 70 percent, but it requires the specific complete-paralysis findings listed in the code.

This page walks through the DC 8515 table, the major-minor split, the grade fight with the sensory-only ceiling, the bilateral math, the line between carpal tunnel and diabetic peripheral neuropathy, the service-connection lanes, the exam evidence that sets the grade, and what surgery does to a rating.

TL;DR

• Carpal tunnel syndrome is rated under DC 8515 as median nerve paralysis: mild 10%/10%, moderate 30%/20%, severe 50%/40%, complete 70%/60%, major (dominant) versus minor hand.
• Each hand is rated separately. Bilateral carpal tunnel is two separate evaluations, and the bilateral factor under 38 CFR § 4.26 adds 10 percent of their combined value.
• When involvement is wholly sensory, § 4.124a limits the rating to mild or at most moderate. Motor weakness, thenar atrophy, and other non-sensory findings can support a higher grade; EMG or nerve-conduction results can help confirm and localize the impairment but are not a regulatory prerequisite.
• Complete paralysis has a specific clinical picture (the "ape hand" with thenar atrophy and loss of thumb opposition), not just very bad symptoms.
• After release surgery, a temporary convalescent 100 percent can apply, followed by re-rating on residual findings.
• Carpal tunnel secondary to service-connected diabetes is a recognized lane under 38 CFR § 3.310, but the same median nerve cannot be rated twice inside both a focal CTS claim and a systemic neuropathy claim.
• No verified aggregate Board-outcome cut for carpal-tunnel-specific claims was available at draft time, so this page publishes no outcome statistic. The omission is flagged in the methodology section.

DC 8515: The Median Nerve Table

The complete rating structure for the median nerve:

8515 Paralysis of the median nerve: Complete: the hand inclined to the ulnar side, index and middle fingers more extended than normally, considerable atrophy of the thenar eminence, thumb in the plane of the hand (ape hand), defective opposition and abduction of the thumb, absence of index-finger flexion and feeble middle-finger flexion, cannot make a fist, wrist flexion weakened, pain with trophic disturbances: 70% major, 60% minor Incomplete, severe: 50% major, 40% minor Incomplete, moderate: 30% major, 20% minor Incomplete, mild: 10% major, 10% minor

The ladder is steep. Mild is 10 on either side. Moderate is 30 or 20 depending on hand. Severe is 50 or 40. Complete is 70 or 60. Between mild and severe, on the dominant hand, is a 40-point spread decided entirely by the grade.

The "complete" picture is specific. It is not "my hand is useless some days." It is the ape-hand deformity: thenar muscles wasted, thumb stuck in the plane of the hand, opposition gone, fist impossible. Most carpal tunnel claims live in the incomplete range, which means most of the money in these claims moves with the mild-moderate-severe judgment.

Major Versus Minor: Use the Correct Column

The major-minor columns track which hand is dominant. Right-handed veterans use the major column for the right hand; left-handed veterans use it for the left. Mild incomplete paralysis is 10 percent on either side. The columns diverge at the moderate, severe, and complete levels.

Two paperwork consequences. Dominance must be established in the file (it usually is, but check it, because a left-hander rated on the major column for the right hand is being shorted by a column). And when both hands are claimed, each hand gets its own evaluation on its own column, then the bilateral factor applies to the pair.

The Grade Fight: Mild, Moderate, Severe

Section 4.124a defines incomplete paralysis as a degree of lost or impaired function substantially less than the complete picture, and then adds the sentence that decides most CTS claims: when the involvement is wholly sensory, the rating should be for the mild, or at most, the moderate degree.

Numbness, tingling, burning, and night pain are sensory findings. When the involvement is wholly sensory, the regulation directs a mild or, at most, moderate evaluation. Non-sensory findings such as measurable grip and pinch weakness or thenar atrophy (the visible hollowing at the thumb base in advanced cases) can support a higher grade when the overall disability picture warrants it.

Nerve-conduction and EMG studies can strengthen the record by confirming median-nerve entrapment at the wrist, distinguishing it from a cervical source or diffuse neuropathy, and documenting sensory or motor involvement. They are supporting evidence, not a regulatory requirement, and the rating still turns on the complete clinical and functional picture.

Bilateral Carpal Tunnel Math

Carpal tunnel is frequently bilateral. Each hand is a separate evaluation: right hand moderate (major, 30%), left hand moderate (minor, 20%), for example. Under 38 CFR § 4.26, the two hand ratings combine, and then 10 percent of that combined value is added before anything else combines. In that example, 30 and 20 combine to 44, the bilateral factor adds 4.4, and the hands together carry 48.4 into the rest of the combined-rating math, where it rounds with everything else toward the final number. The combined rating calculator runs this arithmetic; the point here is that filing one hand when both are affected forfeits an entire evaluation plus the bilateral add-on.

CTS Versus Diabetic Neuropathy: No Double Counting

Many veterans carry both focal carpal tunnel and systemic peripheral neuropathy, especially with service-connected diabetes. Both are rated under § 4.124a, sometimes on the very same median nerve. The boundary that matters: the same nerve's same impairment cannot be evaluated twice under different diagnoses (38 CFR § 4.14). When carpal tunnel is the focal entrapment at the wrist, it is its own evaluation under 8515. When the median nerve is one branch of a systemic diabetic polyneuropathy, it belongs inside the neuropathy ratings. The electrodiagnostics distinguish the two patterns (focal wrist entrapment versus diffuse distal polyneuropathy), and the examiner should say which frame applies. Veterans with diabetes should read both pages, because the lane that fits depends on the study.

The secondary lane matters here too: carpal tunnel secondary to service-connected diabetes, or to service-connected hypothyroidism (edema compressing the nerve, a well-documented association), is claimed under 38 CFR § 3.310 with a current diagnosis and a nexus opinion. Recognized lanes, never automatic.

Service-Connection Lanes

Direct service connection from in-service repetitive use: weapon handling, tool work, vehicle operation, typing and data entry duties, maintenance tasks. The file needs evidence of an in-service event or symptoms, a current diagnosis, and a nexus connecting the current entrapment to service. Electrodiagnostic testing can confirm and localize the diagnosis when clinically indicated.

Secondary service connection to diabetes or hypothyroidism, as above. Aggravation covers pre-service CTS made permanently worse by service duties. Across lanes, the record should identify the median-nerve impairment, its cause, and its functional severity; electrodiagnostic testing is one useful part of that record when available.

The C&P Exam: Where the Grade Is Set

The peripheral nerves DBQ drives the exam. A complete CTS evaluation documents sensory mapping (which fingers, median distribution versus ulnar), Tinel's and Phalen's signs, grip and pinch strength measurements, thenar bulk (atrophy present or absent), reflexes, the functional story (dropping objects, night waking, task limits), and dominance. Electrodiagnostic results, when available, support all of it.

The weak exam is a symptom checklist: "numbness and tingling in both hands" with no strength testing or atrophy assessment. That record may support only a sensory picture. A stronger exam documents what the median nerve can and cannot do, measured separately for each hand, and reconciles any available electrodiagnostic results.

After Surgery: Convalescence and Re-Rating

Carpal tunnel release triggers two rating events. First, a temporary 100 percent convalescent rating can apply during post-surgical recovery under the convalescence rules (38 CFR § 4.30), when the surgery and recovery meet its requirements. Second, re-rating on residuals: if release surgery resolves the entrapment, the evaluation drops toward the residual findings; if numbness, weakness, or thenar loss persists, the rating continues at whatever grade the post-surgical record supports. The documentation mistake is letting the file go quiet after surgery: no post-operative nerve assessment means the rater grades on the thinnest version of the record.

Common Failure Modes

Sensory-only files. No strength testing, no atrophy documentation, no electrodiagnostics. The ceiling caps the grade at mild or moderate.

One hand filed, two hands affected. The second evaluation and the bilateral factor never enter the claim.

Wrong column. A left-dominant veteran evaluated as though the right hand were major can receive the wrong percentage at the moderate, severe, or complete levels.

The neck-wrist mix-up. Cervical radiculopathy (C6-C7 distribution) mimics CTS; without electrodiagnostics or a careful clinical exam, the claim can be attributed to the wrong level and fail on localization.

Post-surgical silence. No post-release re-evaluation, so residuals are graded on nothing.

Secondary Conditions and Neighbors

Carpal tunnel's closest neighbor is peripheral neuropathy, the systemic frame for the same nerve schedule. Ulnar neuropathy (DC 8516) is the other common entrapment, with its own code and its own claw-hand picture. Cervical radiculopathy is the upstream mimic. Diabetes and hypothyroidism are the usual primaries for secondary claims. The code reference lives at /va-codes/8515, and the secondary conditions tool maps the diabetes-to-CTS chain. For severe cases approaching loss of use of the hand, special monthly compensation enters the picture; that analysis is claim-specific and beyond this page's scope.

Bottom Line

Carpal tunnel is median nerve math. The code is DC 8515, the ladder runs 10 to 70, the major and minor columns diverge above the mild level, and each service-connected hand is evaluated separately with the bilateral factor for a compensable pair. Wholly sensory involvement is rated mild or at most moderate; documented motor weakness, thenar atrophy, and the rest of the clinical record may support higher grades. Get both hands evaluated, document dominance, and make sure the rating reflects the full functional picture.

Methodology and Limitations

• Data source: Rating criteria paraphrased and quoted from the current eCFR text of 38 CFR § 4.124a (DC 8515 and the section note on incomplete paralysis and wholly sensory involvement), § 4.26 (bilateral factor), § 4.25 (combined ratings), § 4.30 (convalescence), § 4.14 (pyramiding), and § 3.310 (secondary service connection). Criteria checked against the eCFR current text on 2026-08-06.
• Board statistics: No verified aggregate Board-outcome cut specific to carpal tunnel claims was available at draft time. Claim Raven's verified neuropathy figures describe systemic peripheral neuropathy claims, a different population, so they are not used on this page.
• Limitations:
• Mild, moderate, and severe grades are clinical judgments, not measured thresholds, so application varies between examiners and raters on similar findings.
• Whether a presentation is focal carpal tunnel or part of systemic neuropathy is an electrodiagnostic and clinical determination for the record, not for this page.
• Combined-rating examples illustrate the math and are not predictions of individual outcomes.
• These observations reflect the regulatory text and claim patterns, not legal or medical advice for a specific case.