Sleep Apnea Secondary to Chronic Sinusitis Claim Guide

We analyzed the Board's published decisions and found sleep apnea (DC 6847) claimed as secondary to chronic sinusitis (DC 6513) is a real, mid-sized claim pool that wins clearly more often than it loses once it reaches a merits decision.

How those 393 issues came out

The ICD-10 diagnosis codes most commonly used for DC 6847, Sleep Apnea (the kind on your medical records, decision letter, or C&P exam report). VA rates the disability and its residuals, not the diagnosis itself, so coding can vary.

See the full diagnostic-code page →

Under 38 CFR 3.310 a secondary claim turns on three elements:

• A current diagnosis: a medical diagnosis of sleep apnea (the secondary).
• A service-connected primary: Chronic Sinusitis, already service-connected (the primary). A 0% primary still counts.
• A medical nexus: a medical opinion linking the sleep apnea to the chronic sinusitis, showing the primary caused or aggravated it.

See the Secondary Claim guide for the caused-versus-aggravated split, and the Nexus Letter guide for what makes the medical opinion strong.

Whether that medical link exists in any one case is a medical question decided on that case's own evidence (the nexus).

The outcome split above counts whole issues. This section goes one layer deeper. Under 38 CFR § 3.310 a secondary claim can be won two ways: the chronic sinusitis caused the sleep apnea (§ 3.310(a)), or it aggravated an existing sleep apnea (§ 3.310(b)). Every grant rests on one or the other, so the numbers below divide up the granted claims only.

Direct causation is the route that carries most grants here: 81% of them found the chronic sinusitis caused the sleep apnea, the rest found aggravation. A practical consequence for the nexus opinion: it should address both routes, because a medical opinion that only argues causation leaves the aggravation theory, a separate legal basis, on the table. See the caused-vs-aggravated guide for how the two theories differ.

On the other side: in 25 denied claims the Board looked at this pairing and found no link, meaning it decided the chronic sinusitis neither caused nor worsened the sleep apnea. That is a separate group from the grants above, counted here so the picture is not one-sided.

We analyzed published Board decisions on this pairing to build this split. The grant split covers granted claims only; denied, remanded, and dismissed claims are not in it. Descriptive of the published record, not a prediction.

The record VA actually reviews centers on a small set of documents. We analyzed published Board decisions on these claims and ranked the records that appeared most often:

• A medical nexus opinion: the one record VA weighs most on a secondary claim, a doctor's statement linking your sleep apnea to your service-connected chronic sinusitis and naming the mechanism.
• Sleep study (polysomnography) in the file
• CPAP prescribed or recommended
• Witness statements on snoring or stopped breathing
• In-service fatigue, snoring, or daytime sleepiness
• Weight gain documented during or since service

The diagnostic code involved: DC 6847 (Sleep Apnea). The rating levels for this code are in the rating section below.

Records ranked by how often published Board decisions cited them. The exam that captures most of this is covered in the C&P Exam section below. Source: Board of Veterans' Appeals decisions, RateMyVSO analysis.

What veterans who win this pairing actually put in the file, and why each piece moves the claim.

• Sleep study results: Get your polysomnography or home sleep apnea test on record. VA will not accept a diagnosis without the objective test behind it, even if a doctor told you years ago that you have sleep apnea.
• Proof your sinusitis is already service-connected: Check your rating decision for the date sinusitis was approved. A secondary claim only works if the sinusitis connection already exists. If it's still pending or was denied, that has to be fixed first.
• Sinus imaging and scope results: A CT scan, MRI, or nasal endoscopy that shows blocked or inflamed sinus passages gives the examiner something physical to point to, not just your word that your nose is stuffy.
• Records showing which came first: Pull together dates showing when your sinusitis was diagnosed compared to when snoring, breathing pauses, or daytime exhaustion started or got worse. This timeline is what proves your sinusitis either caused the apnea or made it worse. Both count, and your claim should say so.
• Current sinus treatment records: Recent notes on ongoing congestion, drainage, and medications show your sinusitis is active now, not something that cleared up years ago. A stale sinus condition weakens the link to your current sleep apnea.
• CPAP or oral appliance records: Compliance data and prescription notes show your apnea is serious enough to need ongoing treatment, not a mild, one-time issue.
• A nexus letter that explains the mechanism, not just the conclusion: The letter should say it is "at least as likely as not" that your sinusitis caused or worsened your sleep apnea, and explain how, chronic sinus swelling blocks your nasal airway, which forces mouth breathing and makes your airway more likely to collapse during sleep. It should reference your own test results and history, not read like a form letter that could apply to anyone.
• Show up to every C&P exam, and don't downplay your symptoms: Missing or rescheduling an exam gets your claim denied on the spot, no matter how strong your evidence is. When you're examined, describe your nighttime symptoms and CPAP use honestly and specifically. Undersellling how bad it is hurts your own claim.

The Board has granted service connection for sleep apnea (DC 6847) as secondary to chronic maxillary sinusitis (DC 6513) in more than one published decision. In each case, the Board looked closely at whether a private or VA medical opinion actually explained how nasal blockage from sinusitis narrows the airway and contributes to airway collapse during sleep. Remember that these decisions are not binding on any other veteran's claim, but they show the kind of evidence and reasoning that has supported a grant in this specific pairing.

The VA assigns one of these percentages based on what your medical record documents. Plain-language summary of the rating criteria at 38 CFR; the controlling text is the regulation itself.

Every item below comes from a pattern in the decisions on this pairing, not from general claim advice.

For the mechanics of filing itself, see the Standard Claim Guide and the Fully Developed Claim Guide.

A secondary claim moves through the same pipeline as any other. Understanding who does what helps you know who to contact and what to expect.

1. You file the claim, naming Chronic Sinusitis as the service-connected primary and sleep apnea as secondary. Directly with VA, through VA.gov, or with an accredited representative's help.
2. VA assigns a Veteran Service Representative (VSR) to develop the claim: gather your service treatment records, VA and private medical records, and order a C&P exam if needed.
3. The C&P exam is conducted, usually with the examiner asked to address the specific secondary theory (causation and aggravation both).
4. The file goes to a Rating Veteran Service Representative (RVSR), the "rater," who weighs the medical evidence and decides service connection and, if granted, the rating percentage.
5. VA issues the decision letter stating the outcome and the reasoning.
6. If denied or under-rated, you choose an appeal lane, Supplemental Claim, Higher-Level Review, or a Board appeal, covered below.

Who's who: VSO vs. VSR vs. Rater vs. C&P Examiner

For the full walkthrough, see Inside Your Claim and Claim Stages.

A Disability Benefits Questionnaire (DBQ) is the standardized form the examiner completes for your condition. See the DBQ Guide for how these forms work and whether a private DBQ from your own doctor can be submitted instead of relying solely on a VA exam. For what to expect and how to prepare, see the C&P Exam Prep Guide, and be specific about how your sleep apnea symptoms relate to your chronic sinusitis timeline, treatment, and any aggravation, that is the detail a nexus opinion relies on.

Your decision letter has a narrative "reasons and bases" section and a codesheet with the rating and effective date. See the Reading Your Decision Letter Guide or use the Letter Interpreter tool to decode your own letter. If denied, you have three main lanes:

• Supplemental Claim: refile with new and relevant evidence, such as a nexus opinion that addresses the mechanism and the specific VA rationale you're rebutting. See Supplemental Claim Guide.
• Higher-Level Review (HLR): a senior reviewer looks at the same evidence again, useful if the denial rested on a legal error. See HLR Guide.
• Board Appeal: your case goes to a Veterans Law Judge, with a direct review, evidence, or hearing docket. See Board Appeal Guide.

Not sure which lane fits? See the Appeals decision guide for a side-by-side comparison.

Keep documentation of ongoing treatment, follow-up evaluations, and any updated diagnostic testing for your sleep apnea on file, this protects you if VA schedules a future reexamination. See Protect Your Rating for when a rating becomes protected and Future Reexaminations for what triggers one. If your sleep apnea worsens, see the Rating Increase Guide.