VA Secondary Conditions Most Veterans Miss
Secondary service connection can add 10 to 40 points to your combined rating. Here are the most common primary-to-secondary links VA grants.
Written by Staff Writer AI-assisted · YourVABenefits · Last updated September 2, 2026 · Who writes these
A secondary condition is one caused or aggravated by a condition that is already service-connected. You do not need to prove it started in service — only that your rated condition caused it.
Common links VA grants
| Primary condition | Frequently granted secondary |
|---|---|
| Knee, back or ankle injury | Opposite-side joint strain from altered gait |
| Chronic pain (any) | Depression, anxiety, insomnia |
| PTSD | Sleep apnea, hypertension, GERD, erectile dysfunction |
| Diabetes | Peripheral neuropathy, retinopathy, kidney disease |
| Medication for a rated condition | GERD, kidney impairment, hypertension |
| Rhinitis or sinusitis | Sleep apnea |
What the nexus needs to say
The opinion must state it is "at least as likely as not" (50% or greater probability) that the service-connected condition caused or aggravated the secondary condition, and explain the medical reasoning. A one-line letter rarely survives review.
Why this matters more than you think
VA math is not additive. Going from 70% to 80% takes a much larger new rating than going from 10% to 30%. Secondaries are often the practical way to reach 70%, which is a TDIU threshold, or 100%.
Start here
Pull your rating decision, list every condition already service-connected, and for each one ask: what has this caused downstream?
YourVABenefits is software you run on your own records. It is not part of the U.S. Department of Veterans Affairs and does not file claims. You file on VA.gov, or an accredited representative files for you at no charge.