VA Sleep Apnea Claims Guide
This guide explains how the VA evaluates sleep apnea claims, from service connection to the disability rating and compensation. You will learn how sleep apnea is rated under 38 CFR § 4.97, Diagnostic Code 6847, including the criteria for the 0, 30, 50, and 100 percent levels based on symptoms, sleep-study results, and whether you need a CPAP or BiPAP machine. It covers the main service-connection paths: direct, presumptive exposure-related, and secondary to conditions like PTSD, sinusitis, or weight gain. You will also find the medical evidence you need, what to expect at the C&P exam, and how lay statements and sleep studies support a strong claim. Whether you are filing for the first time or appealing a denial, this guide shows you how sleep apnea claims are evaluated and what evidence most affects your outcome.
Section 1: Overview
Sleep apnea is among the most commonly claimed VA disabilities, with over 650,000 veterans receiving compensation for the condition. It is rated under DC 6847 within 38 CFR § 4.97 (Schedule of Ratings, Respiratory System). All three clinical types, obstructive sleep apnea (OSA), central sleep apnea (CSA), and mixed sleep apnea, are evaluated under the same diagnostic code and the same rating criteria.
Section 2: Types of Sleep Apnea
Obstructive Sleep Apnea (OSA) is the most common type. The upper airway physically collapses or becomes blocked during sleep, causing repeated breathing interruptions. Risk factors include obesity, upper airway anatomy, nasal obstruction, and neurological influences from conditions such as PTSD and TBI.
Central Sleep Apnea (CSA) occurs when the brain fails to send proper breathing signals to the respiratory muscles. It is associated with neurological conditions, opioid use, and traumatic brain injury. CSA is less common and can be more difficult to service-connect without a documented link to a service-related cause.
Mixed Sleep Apnea combines features of both types and is evaluated identically under DC 6847.
Diagnosis requires a polysomnography (overnight sleep study) conducted in a qualified facility, or in some cases a validated home sleep apnea test (HSAT). A diagnosis of sleep apnea is required before VA will assign any rating. A veteran's report of symptoms alone is not sufficient.
Section 3: Service Connection Pathways
Sleep apnea is not a VA presumptive condition for any exposure category as of this writing. Service connection must be established through one of the following pathways.
Direct Service Connection
A veteran demonstrates that sleep apnea began during or was caused by active military service. Supporting evidence includes sleep study results, records from military treatment facilities documenting sleep complaints, and a medical nexus opinion linking the diagnosis to in-service events or exposures. Direct service connection is the most common pathway when symptoms began during a deployment or were documented in service treatment records. See our Service Connection Guide.
Secondary Service Connection (38 CFR § 3.310)
A veteran demonstrates that sleep apnea was caused or chronically aggravated by an already service-connected condition. This is a frequently used and well-supported pathway. See our Secondary Service Connection Guide.
2026 update, the "but for" causation standard: Effective May 1, 2026, VA revised its adjudication manual (M21-1, Part V, Subpart ii, Chapter 2, Section D) so that secondary service connection under 38 CFR § 3.310(a) and (b) covers disabilities that are "the result of, or would not have occurred but for," a service-connected disability. This language tracks the causation standard the Court of Appeals for Veterans Claims applied in Spicer v. McDonough, No. 18-4489 (Vet. App. Sept. 14, 2021), which held that secondary service connection under 38 U.S.C. § 1110 requires actual but-for causation. A service-connected condition that merely prevents treatment of a separate condition, without causing or aggravating it, is not enough. You can read how the Board has applied Spicer in our CAVC research tool.
What "but for" means: the question becomes whether the secondary condition would have developed anyway, even without the service-connected condition. Sleep apnea is a multifactorial condition, meaning it can have several contributing causes such as weight, age, sex, airway anatomy, and family history. When those other possible causes are not addressed in the record, an examiner can find the link too speculative to grant.
Why this matters for the medical opinion: a private nexus opinion is stronger when it does more than assert a link. It helps when the provider addresses the other recognized causes of sleep apnea and explains why they do not account for the diagnosis in this veteran, for example noting that age, documented weight history, or family history is not the likely driver. It is reasonable to ask the treating provider to address each plausible alternative cause and to document the timeline, because under 38 CFR § 3.310(a) the service-connected condition must come before the sleep apnea for a causation theory, while § 3.310(b) covers later aggravation measured against a baseline.
Manual sections carrying the revised language: Secondary SC and Aggravation, Determining the Issues, Reviewing Diagnoses.
Established secondary pathways include:
Secondary to PTSD (DC 9411)
Research supports a medically recognized bidirectional relationship between PTSD and OSA. PTSD disrupts sleep architecture through hypervigilance and chronic stress activation of the hypothalamic-pituitary-adrenal axis. PTSD medications, particularly antipsychotics and antidepressants in the tricyclic and SSRI categories, contribute to weight gain that is itself a primary risk factor for OSA. A 2015 study cited in clinical literature found approximately 69% of Iraq and Afghanistan veterans with PTSD were at high risk for sleep apnea. See our PTSD Claims Guide.
Secondary to TBI (DC 8045)
Traumatic brain injury affects brainstem respiratory control centers. Central sleep apnea and disrupted breathing patterns during sleep are recognized neurological sequelae of TBI.
Secondary via obesity as an intermediary
When a service-connected condition (for example, a bilateral knee disability that prevents exercise) has caused or significantly worsened obesity, and that obesity has caused or aggravated sleep apnea, VA may recognize the full causal chain as secondary service connection. This requires documentation at each link in the chain: the service-connected condition, the resultant weight gain, and the causal role of obesity in the sleep apnea diagnosis. VA precedent, including Linville v. Shulkin, 26 Vet. App. 180 (2013), addressed obesity as an intermediate step.
Secondary to rhinitis, sinusitis, or nasal deformity
Chronic nasal obstruction reduces airflow and promotes mouth breathing, both recognized contributors to OSA. Veterans with service-connected rhinitis (DC 6522), sinusitis (DC 6510 through 6513), or nasal trauma are recognized candidates for secondary connection.
Secondary to Medications
Medications prescribed for a service-connected condition can cause or worsen sleep apnea. Under 38 CFR § 3.310 this is an intermediate-step chain: a service-connected condition leads to a prescribed medication, and that medication causes or aggravates the apnea. See our Secondary Service Connection Guide.
Opioids and CNS depressants: Opioids and other central-nervous-system depressants, often prescribed for chronic pain from service-connected musculoskeletal conditions, blunt the brain's breathing drive and are linked to central sleep apnea.
Benzodiazepines, muscle relaxants, and sedative-hypnotics: These medications, often prescribed for anxiety, PTSD, or back pain, relax upper-airway muscles and can worsen obstructive sleep apnea.
Weight gain from psychiatric medications: Some psychiatric medications cause weight gain that can independently worsen obstructive sleep apnea, creating a separate intermediate-step chain alongside the direct pharmacological effects.
Aggravation under 38 CFR § 3.310(b): If the apnea already existed before the medication was prescribed, 38 CFR § 3.310(b) still allows service connection for the increase in severity caused by the medication, measured against the documented baseline before the worsening.
Evidence: A nexus opinion should name the specific medication and the mechanism, state it is at least as likely as not that the medication caused or aggravated the apnea, and rest on a sleep study that identifies the apnea type, because the distinction between central and obstructive apnea is relevant to which medication mechanism applies.
Service Connection by Aggravation
When a veteran had documented pre-service sleep apnea or sleep-disordered breathing that was significantly worsened beyond its natural progression by military service, aggravation-based service connection under 38 CFR § 3.306 is available.
Section 4: Current Rating Criteria Under DC 6847
Sleep apnea is rated under DC 6847, 38 CFR § 4.97. The current rating structure produces four levels.
- What the VA measures at your C&P exam
- Evidence that has won at the Board
- Inside the rater's playbook: grant, denial, and remand rates
- Secondary condition map
Section 5: Evidence for a Sleep Apnea Claim
Across the Board's published DC 6847 decisions, a private nexus opinion in the file goes with a much higher grant rate, shown below.
Polysomnography report: The sleep study is the foundational diagnostic document. The report identifies the Apnea-Hypopnea Index (AHI), the type of sleep apnea, the oxygen desaturation nadir, and whether CPAP therapy is indicated and at what pressure.
CPAP prescription or recommendation: For a 50% rating under current criteria, documentation that a treating provider prescribed or recommended a breathing assistance device is the key evidence item.
Symptom documentation: Medical records noting daytime sleepiness, cognitive effects, morning headaches, and their impact on function are relevant to both service connection and rating.
Nexus opinion: For secondary claims, a medical opinion from a treating provider or qualified clinician explaining the causal or aggravating relationship between the primary service-connected condition and sleep apnea. The opinion should reference the veteran's specific medical history and cite relevant medical literature where applicable. See our Nexus Letters Guide.
Lay statements: First-person descriptions of sleep disturbance, daytime impairment, and functional limitations, along with statements from spouses or household members who directly observe the veteran's nighttime symptoms, contribute to the evidence record. See our Buddy & Lay Statements Guide. (Jandreau v. Nicholson, 492 F.3d 1372 (Fed. Cir. 2007))
Common Mistakes
Patterns the published DC 6847 decisions flag most often. Among the Board's classified service-connection denials for sleep apnea, here is what claims most often fell short on.
- No nexus opinion in the file. "No nexus" is the leading denial reason for DC 6847. A useful opinion names the in-service event or the service-connected primary and explains the link.
- No confirming sleep study. The VA requires a polysomnography or a validated home sleep apnea test before it will assign any rating, and a veteran's report of symptoms alone is not enough.
- No in-service onset or event documented. Service treatment records that note sleep complaints, or a nexus tying the apnea to a documented in-service exposure, anchor a direct claim.
- Leaving the apnea type out of the record. Central and obstructive apnea connect to service through different mechanisms, so a sleep study that identifies the type lets the nexus opinion match the correct pathway.
- Filing insomnia as a separate claim. Insomnia caused by sleep apnea is folded into the DC 6847 rating, not rated separately, unless it is a standalone DSM-5 insomnia disorder unrelated to the apnea.
Common Secondary Conditions
These are the conditions most often linked with sleep apnea in the Board's published decisions. Each bar is the BVA grant rate for DC 6847, with the number of decisions below it. They describe what the Board's record shows across many veterans, not a prediction about any one claim.
Conditions that can cause sleep apnea (sleep apnea as the secondary)
Claims where sleep apnea was argued as secondary to an already service-connected condition:
Conditions sleep apnea can cause (sleep apnea as the primary)
Conditions veterans have claimed as caused or aggravated by a service-connected sleep apnea:
Section 7: Quick Reference Tables
Secondary Connection Pathways
| Primary Condition | Mechanism | Evidence Needed |
|---|---|---|
| PTSD (DC 9411) | Sleep disruption, hypervigilance, medication weight gain | Sleep study + nexus opinion linking PTSD to OSA |
| TBI (DC 8045) | Brainstem respiratory control dysfunction | Sleep study + neurological nexus opinion |
| Knee/back disability | Immobility causing obesity causing OSA | Three-link documentation: injury, weight gain, OSA |
| Rhinitis/sinusitis (DC 6522, 6513) | Nasal obstruction reducing airflow | Sleep study + ENT or pulmonary nexus |
| Prescribed medications (opioids, benzodiazepines, CNS depressants, psychiatric medications) | Blunted breathing drive (central apnea) or relaxed upper-airway muscles (obstructive apnea); weight gain as intermediate step | Sleep study identifying apnea type + nexus opinion naming the specific medication and mechanism |
Sources
- 38 CFR § 4.97, DC 6847, Schedule of Ratings, Respiratory System (Sleep Apnea Syndromes)
- 38 CFR § 3.310, Secondary Service Connection
- 38 CFR § 3.306, Aggravation of Pre-Service Disability
- 38 CFR § 3.951(b), Protection of Ratings
- 87 FR 8474 (Feb. 15, 2022), NPRM Proposed Sleep Apnea Rating Changes
- 89 FR 74162 (Sept. 12, 2024), Supplemental NPRM on Sleep Apnea
- Linville v. Shulkin, 26 Vet. App. 180 (2013), Obesity as intermediate step in secondary service connection
- Jandreau v. Nicholson, 492 F.3d 1372 (Fed. Cir. 2007), Competency of lay testimony regarding observable symptoms
- VA Claims Insider, "Sleep Apnea Secondary to PTSD" (2025)
- After Service, "VA Sleep Apnea CPAP 50% Rating Explained" (2025)