Secondary service connection means VA grants a new condition because it was caused or made worse by a condition that is already service connected. The new condition does not have to trace back to an event in service. It must trace back to the rated condition, and you need medical evidence of that link.
What does the rule say?
38 CFR 3.310 provides that a disability proximately due to, or the result of, a service-connected condition is service connected. It also covers aggravation, where the service-connected condition makes a separate condition worse. VA decides on the evidence in each claim.
What are common secondary chains?
- Back condition to nerve pain. A service-connected spine problem with radiating leg or arm symptoms. See radiculopathy VA ratings.
- Tinnitus to mental health or sleep problems. Covered in tinnitus secondary conditions.
- Knee or ankle problems to hip or back problems. Changed gait is the usual argument, explained in orthopedic secondary conditions.
- Mental health conditions to sleep apnea. This is a debated link, and the evidence needs to be strong. See sleep apnea and VA ratings.
- Diabetes to related complications. Peripheral neuropathy and kidney disease are claimed as complications of service-connected diabetes. Diabetes can be service connected on a presumptive basis for Agent Orange exposure, per VA.
- Medication side effects. Conditions caused by medicine taken for a service-connected condition, such as digestive problems.
What do you need for a secondary claim?
- A service-connected primary condition, or one claimed at the same time.
- A current diagnosis of the new condition.
- A medical opinion that it is at least as likely as not (50% or greater probability) caused or aggravated by the primary condition. Your own treating provider can write it. VA does not require a paid one.
- Records that show both conditions and the timeline.
File with VA Form 21-526EZ and name the primary condition. The claim can be filed on VA.gov, by mail or with help from an accredited representative. Woobie is not a law firm or an accredited claims agent and does not file claims, but it offers independent medical opinions from licensed professionals.
How is causation different from aggravation?
Causation means the service-connected condition brought on the new one. Aggravation means a condition you already had got worse because of the rated one. Both can qualify under 3.310, and the opinion should say which one applies. Our guide on a nexus letter for secondary conditions goes through the wording.
Ratings combine with VA math, not addition, so a new secondary rating may add less than its number suggests. Estimate it with the free VA disability calculator. Free help is available from an accredited representative.
Frequently asked questions
Is there a limit to secondary claims?
VA’s rules do not set a cap. Each secondary condition still needs its own diagnosis and medical evidence of a link, and VA decides each one on its merits.
Do I need a nexus letter for every secondary claim?
You need medical evidence of the link. Sometimes records and exam findings show it, and sometimes a written opinion from a licensed provider is needed. VA does not require a paid opinion.
What is the difference between causation and aggravation?
Causation means the service-connected condition brought on the new condition. Aggravation means a condition you already had was made worse by the service-connected one. Both can qualify under 38 CFR 3.310.
Can I claim a secondary condition on my first claim?
Yes. You can claim the primary condition and a secondary one together, as long as you name the link and have evidence for each.
Questions about your medical evidence? Woobie offers a free consultation to talk through your situation. Woobie is not a law firm or an accredited claims agent and does not file claims. Schedule a free consultation →