Your service-connected disability may qualify you for additional ratings. PTSD commonly links to sleep apnea, migraines, and GERD. See the most common secondary conditions and how to file.
One of the most underused aspects of the VA disability system is secondary service connection. If you already have a service-connected condition and that condition causes or aggravates another health problem, the new condition can also be rated as service-connected — even if it has nothing to do with anything that happened during your military service.
Here's how it works: you don't need to prove the secondary condition started in service. You need to prove that your already-rated service-connected condition caused or made worse the new condition. The legal standard is "at least as likely as not" — a 50% or greater probability. A medical opinion (nexus letter) from a qualified doctor establishing this connection is typically the key piece of evidence.
Common examples of secondary service connection are everywhere. A veteran rated for a knee injury develops back pain from years of compensating for the bad knee — that back condition can be claimed as secondary to the knee. A veteran rated for PTSD develops sleep apnea, high blood pressure, or depression — each of those can potentially be secondary to PTSD. A veteran on long-term VA medications develops gastrointestinal problems — those GI issues may be secondary to the medications prescribed for the primary condition.
Some of the most common secondary claims include sleep apnea secondary to PTSD or obesity caused by limited mobility, peripheral neuropathy secondary to diabetes, radiculopathy secondary to back conditions, depression secondary to chronic pain conditions, erectile dysfunction secondary to medications or psychological conditions, and migraines secondary to traumatic brain injury.
The impact on your overall rating can be substantial. Each secondary condition gets its own rating, and those ratings combine with your existing ratings using the VA's combined ratings formula. A veteran with a 50% rating for a back condition who adds secondary radiculopathy in both legs (each rated at 20%) could see their combined rating jump to 70% or higher — potentially crossing a threshold that unlocks additional benefits like property tax exemptions or dependent education benefits.
To file a secondary claim, you use the same VA Form 21-526EZ used for any disability claim. The critical difference is that you explicitly state the condition is secondary to an already-rated disability. Include a nexus letter from your doctor connecting the two conditions. Your VSO can help you identify potential secondary conditions you might not have considered and ensure the claim is filed correctly.
If you have service-connected conditions and you've developed other health problems over the years, review your situation for potential secondary claims. Many veterans could significantly increase their rating and benefits by claiming conditions they assumed had nothing to do with their service.