Secondary Service Connection and Disability Ratings for Sleep Apnea and Hypertension

Sleep apnea and hypertension are two common conditions that significantly impact veterans and understanding how they’re linked will help you get the disability benefits you deserve. This guide explains how the VA rates both conditions, how they interact, and how to successfully file for secondary service connection.

How the VA Evaluates Hypertension

Hypertension, or high blood pressure, occurs when the force of blood against artery walls is consistently too high. Medical associations define hypertension as blood pressure readings of 130/80 mmHg or higher, but the VA has different standards for rating purposes. 

To the VA, hypertension means that the diastolic blood pressure is predominantly 90 mm. or greater, and isolated systolic hypertension means that the systolic blood pressure is predominantly 160 mm. or greater. Under Diagnostic Code 7101, hypertension is rated at 0%, 10%, 20%, 40% and 60%, depending on blood pressure readings and the need for continuous medication.

VA Rating Criteria for Hypertension

• 0% rating: For a diagnosis of hypertension related to military service but without meeting the criteria for compensation. Even a noncompensable rating can be used to service connect sleep apnea.  
• 10% rating: Diastolic pressure predominantly 100 or more, or; systolic pressure predominantly 160 or more, or; minimum evaluation for an individual with a history of diastolic pressure predominantly 100 or more who requires continuous medication for control. 
• 20% rating: Diastolic pressure predominantly 110 or more or systolic pressure predominantly 200 or more. 
• 40% rating: Diastolic pressure predominantly 120 or more. 
• 60% rating: Diastolic pressure predominantly 130 or more.

This means a veteran can have medically diagnosed hypertension but still not qualify for a VA disability rating unless it meets the higher VA thresholds or requires continuous medication with documented historical readings.

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How the VA Rates Sleep Apnea 

While the maximum VA rating for hypertension is 60%, sleep apnea is rated by the VA up to 100%, based on how it affects the ability to function and whether it requires medical treatment. Most veterans who use a CPAP machine are rated at 50%. 

VA Rating Criteria for Sleep Apnea (Diagnostic Code 6847)

• 0% rating: Asymptomatic (diagnosed by a sleep study) 
• 30% rating: Persistent daytime hypersomnolence 
• 50% rating: Requiring the use of a CPAP machine 
• 100% rating: Chronic respiratory failure, cor pulmonale (right-sided heart failure), or requiring a tracheostomy 

Proving That Hypertension Causes Sleep Apnea

Hypertension affects more than 37% of veterans and is the most common vascular risk factor among those who have had a stroke. Research has shown that untreated sleep apnea can contribute to the development and worsening of hypertension. 

This is because hypertension leads to changes in the structure of the upper airway, making it more prone to collapse during sleep. A 2021 study in the Journal of Clinical Sleep Medicine found that over half of the 420 veterans screened tested positive for sleep apnea. 

Additionally, hypertension sometimes causes fluid retention, which may accumulate in the neck and increase the likelihood of airway obstruction. This creates a cycle that exacerbates both conditions. Find out more below about getting a combined rating for hypertension and sleep apnea. 

How Sleep Apnea Can Cause High Blood Pressure

Sleep apnea can cause hypertension due to the repeated episodes of oxygen deprivation during sleep. This lack of oxygen triggers the body’s stress response, leading to increased blood pressure and a higher risk of strokes and heart attacks. 

The bi-directional relationship between the two conditions makes it possible to file a secondary service connection claim either way: sleep apnea secondary to hypertension, or hypertension secondary to sleep apnea. Read more below or watch this video to find out everything you need to know: 

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Establishing Secondary Service Condition 

Secondary service connection is when a service-connected condition (like hypertension) causes or worsens another condition (like sleep apnea). To win this type of claim, you need three things: 

1. A current diagnosis of the secondary condition
2. A primary service-connected condition
3. A nexus (link) from a medical professional explaining how one caused or aggravated the other

What You Need to Prove Hypertension Secondary to Sleep Apnea

• Medical Diagnosis: Ensure you have a confirmed diagnosis of both hypertension and sleep apnea from a qualified healthcare provider.
• Nexus Letter: Obtain a nexus letter from your doctor. This letter should explain how your hypertension has caused or aggravated your sleep apnea, citing relevant medical research and your specific medical history.
• Consistent Medical Records: Maintain comprehensive and consistent medical records showing the progression and treatment of both conditions.
• VA Form 21-526EZ: Submit this form to file your claim, along with all supporting medical documentation and the nexus letter.

Getting a VA Rating for Sleep Apnea Secondary to Hypertension

The process is the same as for hypertension secondary to sleep apnea, with the primary and secondary disabilities reversed.

• Current Diagnosis: Obtain a diagnosis of sleep apnea 
• Primary Service Connection: Have an existing service connection for hypertension 
• Get a Nexus Letter: A strong letter from your doctor explaining how your hypertension caused or aggravated your sleep apnea 
• Submit Relevant Medical Records: Document your diagnosis, treatments, and any complications 
• Include Medical Research: Peer-reviewed studies showing the link between sleep apnea and high blood pressure can support your claim 
• Use Lay Evidence: Statements from family members or coworkers describing symptoms like snoring or fatigue can help establish the severity of sleep apnea 

Case Example: Veteran Wins Service Connection for Sleep Apnea Secondary to Hypertension

In a recent decision (Citation Nr. A25007743,  Jan. 29, 2025), the Board of Veterans’ Appeals granted service connection for obstructive sleep apnea after finding that the condition was caused or aggravated by the veteran’s service-connected hypertension. The veteran served in the U.S. Army from December 1968 to September 1971 and was already service connected for hypertension. He appealed a prior denial that addressed only direct service connection, arguing instead that his high blood pressure was medically linked to his sleep apnea. 

The veteran underwent a VA sleep apnea examination in May 2023, where he was formally diagnosed with obstructive sleep apnea confirmed through a sleep study. The examiner concluded that the sleep apnea was less likely than not related to the veteran’s toxic exposure risk activities (TERA) during service, explaining that there was no scientific evidence connecting such exposure to sleep apnea. However, the examiner noted that the veteran had significant post-service risk factors, including hypertension and a history of tonsillar cancer, that contributed to his condition. 

Because the initial VA opinion did not address whether the veteran’s hypertension caused or worsened his sleep apnea, the VA obtained an addendum opinion in March 2024. In that report, the examiner again emphasized that non-service-related factors such as age and obesity played a larger role in the development of OSA than in-service exposures. However, the examiner explicitly listed hypertension among the veteran’s primary risk factors for sleep apnea. The Agency of Original Jurisdiction, in a March 2024 higher-level review, accepted this as a favorable finding, acknowledging that hypertension was a medically recognized contributing factor to the veteran’s OSA. 

Because the evidence was at least in approximate balance regarding whether hypertension caused or aggravated the veteran’s sleep apnea, the Board resolved reasonable doubt in the veteran’s favor. As a result, the veteran was awarded service connection for sleep apnea as secondary to hypertension, ensuring compensation and medical coverage for a condition now recognized as related to his existing service-connected disability. 

Can You Get 100% VA Disability for Sleep Apnea and Hypertension?

Many veterans qualify for 50% for sleep apnea and 10%–20% for hypertension, totaling around 60%–70%. However, if these conditions significantly impact your ability to work and earn above poverty level, you may qualify for Total Disability based on Individual Unemployability (TDIU), which pays at the 100% rate even if you don’t have a 100% combined rating. This is especially likely if you suffer from fatigue, cognitive issues, or heart complications related to your sleep and blood pressure problems.