Sleep apnea is rated under DC 6847 (38 CFR § 4.97) at four tiers — 0/30/50/100. The 50% tier triggers on documented CPAP requirement, making it one of the highest-leverage documentary ratings in the schedule. The strongest secondary pathway is sleep apnea secondary to PTSD under § 3.310 — supported by published medical literature on medication-induced weight gain, hyperarousal-disrupted sleep architecture, and PTSD-comorbid metabolic syndrome. A sleep study (polysomnography or accepted home sleep test) is required evidence.
Under 38 CFR § 4.97 Diagnostic Code 6847, sleep apnea syndromes (obstructive, central, mixed) have four tiers:
Objective evidence is mandatory. A polysomnography showing an apnea-hypopnea index (AHI) of 5 or more events per hour establishes the diagnosis. Home sleep tests are accepted in many cases. Self-reported snoring or daytime fatigue alone will not service-connect sleep apnea.
The AHI also classifies severity: 5-15 = mild, 15-30 = moderate, >30 = severe. The severity classification does not directly set the VA rating — DC 6847 is keyed to treatment requirement (CPAP), not raw AHI — but a higher AHI strengthens the diagnosis and may influence the examiner's narrative on functional impact.
Direct service connection under 38 CFR § 3.303: documented snoring or witnessed apneas in service treatment records, a roommate or buddy statement describing in-service breathing pauses, or in-service treatment for related conditions (deviated septum, weight gain on PTSD medications, chronic fatigue).
Diagnosis within ~1 year of separation strengthens the direct-connection case via the § 3.303(b) continuity-of-symptomatology doctrine. Sleep apnea is not on the § 3.309(a) chronic-disease presumptive list, so there is no automatic 1-year presumption — but a diagnosis shortly after separation makes the continuity argument much stronger when paired with lay evidence of in-service symptoms.
For direct service connection where the diagnosis came years after separation, an Independent Medical Opinion explaining delayed-onset OSA (weight gain, anatomic changes, age-related airway laxity progression from in-service baseline) is the standard recovery path.
The most successful secondary claim path. Filed under 38 CFR § 3.310. The medical literature supports three independent mechanisms:
Medication-induced weight gain. SSRIs and SNRIs (sertraline, paroxetine, fluoxetine, venlafaxine) and atypical antipsychotics frequently used in PTSD treatment cause weight gain. Obesity is the strongest modifiable risk factor for obstructive sleep apnea.
Hyperarousal-disrupted sleep architecture. PTSD-related autonomic hyperarousal fragments REM sleep, reducing upper-airway muscle tone modulation and increasing apnea-hypopnea events.
PTSD-comorbid metabolic syndrome. PTSD is associated with metabolic-syndrome clustering (visceral adiposity, insulin resistance, dyslipidemia) — each independently linked to OSA risk.
The nexus letter from a sleep medicine physician or psychiatrist citing these pathways at the “at least as likely as not” threshold is the strongest claim foundation.
A common C&P denial route: the examiner attributes sleep apnea to post-service weight gain and finds no nexus to service. The counter-argument has three lines, often used together in a nexus letter:
Medication-induced weight gain. Antidepressants, anti-anxiety medications, and pain medications prescribed for service-connected conditions cause measurable weight gain. The weight gain is a downstream effect of the service-connected condition's treatment, not an independent lifestyle factor.
Service-connected mobility limitation. Musculoskeletal disabilities that restrict exercise capacity contribute to weight gain. The mobility deficit is itself service-connected; the weight gain follows.
Depression-related overeating. Service-connected mental health conditions (PTSD, MDD) frequently produce appetite dysregulation and weight gain as documented sequelae.
A nexus letter that names the specific service-connected condition, the specific medication or symptom causing weight gain, and links the weight gain to OSA development is the strongest rebuttal to an obesity-attribution denial.
Two different thresholds confuse many veterans:
Rating side (DC 6847). The 50% tier triggers on the requirement for a breathing-assistance device — not on faithful use. A veteran who has a CPAP prescription but tolerates it poorly still qualifies for the 50% rating. The plain language is “requires use,” not “uses adequately.”
Supplies side (insurance + VA Prosthetics). Most insurance plans and the VA prosthetics service require 4+ hours per night on 70% of nights over a 30-day period to continue providing CPAP supplies, masks, and replacement equipment. Falling below this threshold can interrupt the supply pipeline — but does not threaten the rating.
Practical step: keep your CPAP machine's usage-data download. Modern devices track nightly hours and residual AHI; the data is one of the cleanest pieces of evidence for both rating continuity and supplies eligibility. If your sleep study was performed at a VA facility, the polysomnography report should already be in your C-file — but verify, because missing sleep-study records are a common cause of avoidable denials.
Confirmed sleep study results — provide a copy if private.
Symptom history: snoring, witnessed apneas, daytime hypersomnolence, morning headaches.
Treatment: CPAP/BiPAP/APAP usage hours per night, machine settings, replacement supplies.
Functional impact: missed work due to fatigue, accidents, cognitive impairment, secondary effects (mood, weight, hypertension).
Compliance: many veterans worry about non-compliance affecting the rating — DC 6847 does not require strict compliance to maintain the 50% tier. The criterion is “requires use,” not “uses faithfully.”
Under DC 6847 (38 CFR § 4.97): 0% (asymptomatic but documented sleep-disordered breathing), 30% (persistent day-time hypersomnolence), 50% (required use of breathing-assistance device — CPAP or similar), 100% (chronic respiratory failure with carbon dioxide retention or cor pulmonale, or requires tracheostomy).
Effectively yes. DC 6847 explicitly assigns 50% for "requires use of breathing assistance device such as continuous airway pressure (CPAP) machine." A prescription for CPAP by a sleep medicine specialist documented in VA or private records is the standard evidence for the 50% tier.
Effectively yes. The VA requires objective evidence of obstructive or central sleep apnea — a polysomnography (sleep study) showing an apnea-hypopnea index (AHI) of 5 or more events per hour. Home sleep tests are accepted in many cases. Self-reported symptoms alone will not establish service connection.
Filed under 38 CFR § 3.310. The medical-literature foundation includes (a) PTSD-related medication-induced weight gain leading to obstructive sleep apnea, (b) PTSD hyperarousal disrupting REM sleep architecture, and (c) PTSD-comorbid metabolic syndrome contributing to airway obstruction. A nexus letter from a sleep medicine physician citing these pathways is the strongest route at the "at least as likely as not" threshold.
Yes — under Allen v. Brown and 38 CFR § 3.310(b). Pre-existing mild sleep apnea aggravated by a service-connected condition (PTSD, GERD, deviated septum, etc.) qualifies for secondary service connection at the degree-of-worsening above baseline.
$1,131.68/month for a single veteran (no dependents). At 100%, $3,938.58/month. The 50% rate is one of the most commonly-cited reasons to pursue a sleep apnea claim — the CPAP trigger is documentary, not subjective.