Restless Leg Syndrome

There is no line in the VA rating schedule for restless leg syndrome. When VA rates RLS, it uses 38 CFR § 4.20, the analogous-ratings rule: an unlisted condition is rated under a closely related disease or injury with closely analogous functions, anatomical localization, and symptomatology. In practice, two analogs show up in RLS decisions. Some claims are evaluated under DC 8103 (convulsive tic), which rates 0, 10, or 30 percent by frequency, severity, and muscle groups involved. Others are evaluated under DC 8620 (neuritis of the sciatic nerve), which borrows the sciatic nerve's own paralysis scale of 10 to 60 percent per the neuritis rules in § 4.123 and § 4.124.

That analogy choice is not cosmetic. It decides the ceiling (30 percent under 8103, up to 60 under the 8620 route), the kind of evidence that matters (movement descriptions versus nerve findings), and how the disability is evaluated. The second structural decision is the service-connection lane. RLS may be claimed directly or as secondary to another service-connected condition or its treatment, but association alone is not a nexus. The theory and the individual medical evidence determine what has to be proven.

This page walks through the analogous-rating mechanics, the 8103 versus 8620 tradeoff, what per-leg and bilateral evaluations may look like, the primary-versus-secondary RLS boundary, and the evidence each theory requires.

TL;DR

• Restless leg syndrome has no dedicated diagnostic code. Individual decisions have used analogies such as DC 8103 (convulsive tic: 0%, 10%, or 30%) or DC 8620 (sciatic neuritis, which borrows the sciatic nerve's 10% to 60% scale with the neuritis caps of § 4.123 and § 4.124). Neither analogy is mandatory for every RLS claim.
• The analog is chosen by the rater based on which listed condition is closest in functions affected, localization, and symptoms. Conjectural analogies and analogies for conditions of doubtful diagnosis are barred by § 4.20 itself.
• RLS is evaluated on documented findings: the IRLSSG clinical criteria (urge to move, worse at rest, worse in the evening, relieved by movement), treatment history, and sleep and daytime impact.
• Some decisions evaluate each leg separately, which can raise the combined evaluation; the presentation and findings drive that, not a rule that both legs always double the rating.
• Potential secondary theories include service-connected peripheral neuropathy, medication effects, and aggravation associated with another sleep disorder. Medical sources recognize that RLS can coexist with neuropathy and sleep apnea and that some medications can worsen symptoms, but a claim under 38 CFR § 3.310 still needs case-specific evidence of causation or aggravation.
• No verified Board-outcome statistic specific to RLS claims is available, so this page publishes none.

No Code: How Analogous Rating Works

Section 4.20 is short and strict: an unlisted condition may be rated under a closely related disease or injury where the functions affected, the anatomical localization, and the symptomatology are closely analogous. The same section bars conjectural analogies and bars analogous ratings for conditions whose diagnosis is doubtful or unsupported by clinical findings.

Two consequences follow for RLS. First, the diagnosis has to be solid before the analogy question even opens. RLS is a clinical diagnosis made on the IRLSSG criteria: an urge to move the legs, usually with uncomfortable sensations, that begins or worsens during rest, is worse in the evening or night, and is at least partially relieved by movement. A file that documents those features, and distinguishes RLS from leg cramps, akathisia, and neuropathic pain, gives the rater a condition to analogize. A file that says "legs feel funny at night" invites the doubtful-diagnosis bar.

Second, the analog choice matters because the two examples use different criteria and different maximum evaluations.

DC 8103 Versus DC 8620: Ceilings and Tradeoffs

DC 8103, convulsive tic. The current text rates severe at 30 percent, moderate at 10 percent, and mild at 0 percent, depending on frequency, severity, and muscle groups involved. This analog fits the involuntary-movement face of RLS, the leg jerks and the sleep-periodic limb movements. Its ceiling is 30 percent.

DC 8620, neuritis of the sciatic nerve. This analog borrows the sciatic nerve's paralysis scale (mild 10%, moderate 20%, moderately severe 40%, severe 60%) through the neuritis rule in § 4.123. Neuritis characterized by organic changes (reflex loss, muscle atrophy, sensory disturbances, constant pain) rates on that full scale up to the severe level. Neuritis without those organic changes is capped at moderate, or moderately severe for the sciatic nerve. Neuralgia (DC 8720) caps at moderate incomplete paralysis under § 4.124. This analog fits RLS presentations framed around nerve-type sensory disturbance in the legs, and its ceiling is higher, but the severe grade requires the organic-change findings, not just worse discomfort.

The tradeoff in plain terms: the 8103 frame is the easier fit for classic urge-to-move RLS but stops at 30. The 8620 frame can reach higher but asks for neurological findings many RLS files do not contain, and the neuritis caps apply when those findings are absent. Which analog a given claim receives is the rater's call on the record; what the veteran controls is whether the file documents movement-type symptoms, nerve-type findings, or both, and whether the evidence supports the chosen frame.

Per-Leg Evaluations and the Bilateral Question

Some RLS decisions evaluate each lower extremity separately, consistent with how the nerve codes are structured for unilateral involvement. When both legs are evaluated, the bilateral factor under 38 CFR § 4.26 can add 10 percent of the combined bilateral value when its requirements are met. This is a possibility in the structure, not a guarantee: the presentation has to support separate extremity findings, and a single global evaluation is also common. The safe statement is that per-leg documentation (which leg, what findings, what severity) keeps the separate-evaluation option open, while a file that treats the legs as one undifferentiated problem invites a single evaluation.

Primary Versus Secondary RLS

The lane decision shapes the evidence. Primary (idiopathic) RLS is the condition standing alone: a direct service-connection theory needs evidence of in-service onset or aggravation, a current diagnosis, and evidence connecting the two. Secondary RLS requires a current diagnosis plus medical evidence that a service-connected condition or its treatment caused or aggravated the RLS. Neuropathy, iron deficiency, chronic kidney disease, medication effects, and sleep disorders may be clinically relevant, but association or co-occurrence alone is not a VA nexus.

For a secondary claim, an existing service-connected condition is only the starting point. The record must also support that it caused or aggravated RLS. A documented sequence between a service-connected neuropathy or medication change and RLS onset may help a clinician assess that question, but timing by itself does not establish the link. Akathisia, medication-associated restlessness that can resemble RLS, is a different phenomenon, so the prescriber's notes should distinguish the diagnoses.

Service-Connection Lanes

Potentially secondary to peripheral neuropathy. Federal medical guidance lists neuropathy among conditions that may occur alongside RLS. When neuropathy is service-connected, a secondary theory under 38 CFR § 3.310 still requires a current RLS diagnosis and a medical opinion addressing causation or aggravation in that veteran's record.

Potentially secondary to medication runs through the treatment record. Some serotonergic antidepressants, antipsychotics, anti-nausea drugs, and sedating antihistamines can aggravate RLS symptoms. A claim needs the service-connected condition, the relevant medication history, a current diagnosis, and medical evidence addressing whether that medication caused or aggravated the RLS.

Potentially aggravated by sleep apnea. RLS and obstructive sleep apnea often coexist, but medical reviews state that the causal relationship is unclear. Co-occurrence is not enough for secondary service connection. A case-specific opinion must explain how the service-connected sleep apnea caused RLS, or whether RLS would be less severe but for the sleep apnea, including when the sleep apnea got in the way of treatment. For aggravation, VA's claims manual, M21-1 V.ii.2.D (changed May 1, 2026 to follow Spicer v. McDonough), no longer considers natural progress, even though the text of § 3.310(b) still mentions it, and the worsening does not have to be permanent. VA still needs a baseline and rates the difference between the baseline and the current severity; an increase too small to change the rating level is granted at 0 percent.

Direct service connection covers in-service onset with documented symptoms. No lane is automatic, and each needs the diagnosis, the primary or in-service evidence, and a medical opinion connecting them.

Evidence and the C&P Exam

There is no single lab test that confirms RLS, so the file is built from clinical documentation. Useful evidence includes the diagnostic features written out by a clinician (urge to move, rest-triggered, evening-worse, movement-relieved), medication and iron history, a sleep-medicine or neurology evaluation distinguishing RLS from akathisia, cramps, and neuropathy, and a description of functional effects. A sleep study is not required to diagnose RLS, though it may identify periodic limb movements or another sleep disorder. Separate evaluations are possible only when distinct diagnoses and manifestations are established; 38 CFR § 4.14 bars paying twice for the same manifestations.

The exam failures are predictable: "restless legs" recorded as a complaint with no criteria documented, no distinction from medication-induced akathisia, and no stated onset timeline for the secondary theory.

Common Failure Modes

The doubtful-diagnosis bar. Section 4.20 blocks analogous ratings for conditions of doubtful diagnosis; a file without the clinical criteria written down hands the rater that bar.

Wrong-analog surprise. The claim is argued for the 8620 ceiling, but the record contains no nerve findings, so the neuritis caps hold it at moderately severe (the sciatic limit without organic changes) or the rater simply selects 8103 instead.

Akathisia confusion. The restlessness started with an SSRI and stops when the drug stops; argued as idiopathic RLS, it collapses on the mechanism.

Undifferentiated legs. No per-leg findings, so the separate-evaluation structure never opens.

Onset timeline missing. A secondary theory with no documented sequence between the primary condition (or its medication) and the RLS onset.

Secondary Conditions and Neighbors

RLS sits in the sleep and nerve neighborhood: insomnia, sleep apnea, peripheral neuropathy, and sciatica, whose nerve scale the 8620 analog borrows. These conditions may coexist without one legally or medically causing another. The code reference for the tic analog is /va-codes/8103; DC 8620 is in the eCFR text of § 4.124a. The secondary conditions tool maps possible lanes at a general level.

Bottom Line

Restless leg syndrome is rated by analogy, and the selected analogy changes the criteria. The 8103 convulsive-tic frame caps at 30 percent; an 8620 neuritis frame can reach higher when the record supports that analogy, and its severe grade depends on the organic nerve findings described in § 4.123. Document the clinical diagnosis, distinguish RLS from akathisia and cramps, and obtain case-specific evidence for any direct or secondary theory. Per-leg findings matter if the record could support separate neurological evaluations, but neither the analog nor separate ratings are automatic.

Methodology and Limitations

• Data source: Rating criteria paraphrased from the current eCFR text of 38 CFR § 4.20 (analogous ratings), § 4.124a (DC 8103 convulsive tic, DC 8620 neuritis and the sciatic scale), § 4.123 (neuritis caps), § 4.124 (neuralgia cap), § 4.26 (bilateral factor), § 4.14 (avoidance of pyramiding), and § 3.310 (secondary service connection). Medical context was checked against current NINDS guidance, which identifies neuropathy and sleep apnea as associated conditions and certain medications as possible aggravators. Criteria checked on 2026-08-06. Secondary aggravation guidance follows M21-1 V.ii.2.D (change date May 1, 2026), checked on 2026-09-24.
• Board statistics: No verified Board-outcome statistic specific to restless leg syndrome claims is available, and a figure from a different condition would not describe these claims, so this page publishes no outcome statistic.
• Limitations:
• Which analog a rater selects, and whether extremities are evaluated separately, are determinations made on the individual record; this page describes the frames, not their application to any claim.
• Medical association or co-occurrence does not establish a secondary-service-connection nexus; causation and aggravation require case-specific evidence.
• Medication effects vary by drug and patient and are not predictions.
• These observations reflect the regulatory text and claim patterns, not legal or medical advice for a specific case.