Veteran Benefits
Secondary Service Connection
A secondary service-connected condition is a health problem that grew out of a disability the VA already pays you for. Because the original condition is service-connected, the new one can be too - even though it did not begin in the military. For aging veterans whose conditions have branched and worsened over decades, this is one of the most common ways to raise a rating that is being left on the table.
Who this is for
If you have carried a service-connected condition for years, chances are it has not stayed still. The bad knee that wore out your hip, the diabetes that dulled the feeling in your feet, the medication that stole your sleep - these downstream problems can be service-connected too, and paid on top of what you already receive.
In plain language
What Secondary Service Connection covers
- New conditions caused by an existing service-connected disability
- Conditions your service-connected disability made worse (aggravation)
- Side effects of medication you take for a service-connected condition
- Mental-health conditions that grow out of chronic service-connected pain or illness
38 CFR 3.310
The rule that lets one service-connected condition make another one service-connected
Cause OR worsen
You can claim a condition your disability caused - or one it made permanently worse
1 nexus letter
A doctor's opinion linking the two is what wins or loses the claim
The full picture
Everything you need to know
Nothing hidden behind a click. Here is the whole story in plain language, so you can decide what fits your situation.
Key facts & current figures
- A secondary condition is a new problem caused or made worse by a disability the VA already recognizes - and it can be rated and paid just like the original (38 CFR 3.310).
- You do not have to prove the secondary condition started in service - only that your service-connected condition led to it or aggravated it.
- Classic chains: diabetes leading to neuropathy, kidney disease, or eye damage; a bad knee changing your gait and wearing out your hip, back, or other knee; PTSD medication causing weight gain, sleep apnea, or GERD.
- The link is proven with a medical "nexus" opinion - a doctor stating it is *at least as likely as not* that condition A caused condition B.
General figures, current as of December 2025 and reviewed each year. Your exact amount depends on your situation - always confirm on va.gov.
What "secondary" really means
- Your body does not keep conditions in tidy boxes. A disability the VA already recognizes can set off a chain reaction - and the law lets those downstream problems be service-connected too.
- Under 38 CFR 3.310, a condition is secondary when it is "proximately due to or the result of" a service-connected disability, or when a service-connected disability makes a separate condition permanently worse.
- You do not have to show the secondary condition started in service. That is what makes it different from - and often easier than - a brand-new direct claim.
Common chains we see in older veterans
- Diabetes (service-connected, often from Agent Orange) leading to peripheral neuropathy, chronic kidney disease, retinopathy, or heart disease.
- A service-connected knee, ankle, or foot injury that changes how you walk and slowly wears out the other knee, a hip, or your lower back.
- PTSD or depression driving high blood pressure, sleep apnea, or GERD - sometimes from the condition itself, sometimes from the medication used to treat it.
- Amputations or loss of use causing overuse injuries in the limbs that carry the extra load.
Aggravation counts too
- You can be paid even if your service-connected condition did not *cause* the new problem, as long as it made an existing one measurably worse.
- In an aggravation claim the VA rates the amount of additional disability - the extra harm on top of the condition's normal baseline.
- This matters for older veterans whose non-service conditions (like arthritis) are being pushed along faster by a service-connected injury.
Why the nexus letter is everything
- A secondary claim stands on one sentence: a medical professional stating it is "at least as likely as not" that your service-connected condition caused or aggravated the new one.
- Without that opinion, the VA treats the two conditions as unrelated and denies the link - even when the connection is obvious to any physician.
- A strong nexus letter explains the medical *reasoning*, not just the conclusion. Getting it right before you file saves months of appeals.
Your complete benefit picture
Paid on top
A secondary condition is rated and paid just like the original - stacking onto the compensation you already receive and often raising your combined rating. Confirm details on va.gov.
Do not miss this
The VA will not connect the dots for you
Secondary claims are among the most common ways aging veterans raise a rating - and among the most commonly missed, because no one automatically links a new problem back to an old service-connected one.
If a condition you are already paid for has led to something new, say so plainly and back it with a medical opinion.
Follow the chain
Diabetes to neuropathy, a bad knee to a worn-out hip, PTSD medication to sleep apnea - map how one led to the next.
Aggravation counts
Even if your condition did not cause the new problem, you can be paid if it made it measurably worse.
A clear path forward
Your step-by-step action plan
No rush and no pressure - but a little order helps. Applying is always free.
First
List the chain
Write down each service-connected condition and the newer problems you believe grew out of it.
Get the opinion
Ask a doctor for a nexus letter
You need a statement that it is at least as likely as not that condition A caused or worsened condition B.
File it
Add it on VA Form 21-526EZ
Name each secondary condition and attach the medical evidence linking it to your service-connected disability.
Get a review
Have the links checked
A knowledgeable review often spots secondary conditions a veteran did not realize were claimable.
Who to call & where to go
These are free, official VA lines. Have your Social Security number handy when you call.
VA Benefits Hotline
Compensation, pension, and general claim questions.
MyVA411 - Main VA Line
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702-992-4883Not sure where to start?
File it as part of a disability claim on VA Form 21-526EZ and name the secondary condition plainly. The key piece is medical evidence connecting the two - a "nexus" letter from a doctor explaining that your service-connected condition caused or worsened the new one. List every condition you believe is connected; do not assume the VA will spot the link on its own.
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