Nexus Letter — VA medical opinion

A nexus letter is a written medical opinion from a doctor — usually your own treating physician or a hired specialist — that connects your current health condition to your military service. "Nexus" is Latin for link or connection. In simple terms: the letter says your military service caused, contributed to, or worsened your disability.

**Why nexus letters matter:** To get service-connected for a disability, the VA needs to see three things: proof of an in-service event, a current diagnosis, and a link between the two. The nexus letter provides that link. Without it, even veterans with obvious conditions often get denied because the connection to service isn't officially documented.

**What a strong nexus letter must say:** - Your doctor's credentials and review of your military and medical records - A clear statement that your condition is "at least as likely as not" connected to your service (this exact wording meets the VA's legal standard — 50% or greater probability) - The medical reasoning behind that conclusion

**When you need one:** Nexus letters are especially important when the VA's own C&P exam gives a negative result, when you're filing a secondary service connection claim, or when your condition has a delayed onset after service (common with PTSD, hearing loss, and degenerative conditions).

**Cost:** Nexus letters from independent doctors typically cost $500–$2,000. Telemedicine services often offer lower-cost options. Given that a single extra rating point can mean years of higher monthly payments, many veterans find the investment worthwhile.