VA Nexus Letter Checklist
The nexus is the leg most claims fail on: the medical link between what happened in service and what you live with now. Your doctor has to write it — but most doctors have never been told what the VA actually weighs. Check the letter you have against the six things below, then print the brief and hand it to your provider.
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You cannot write this letter yourself. A nexus is a medical opinion, and it only counts coming from a qualified provider who signs it.
- That's not a technicality. A letter in your own words carries no medical weight, no matter how true it is. Your own account belongs in a personal statement instead, where it does count.
- What you can do is make sure your doctor knows the standard. Most have never seen a VA claim and don't know the wording the VA needs.
- A private treating physician, a specialist, or a private independent examiner can all write one. It does not have to be a VA doctor.
A doctor who wants to help will often write may be related to his service
or could possibly be connected
. It sounds supportive. It fails the standard, and the VA gives it little weight.
The VA needs at least a 50/50 call: "at least as likely as not." If your letter says "may be," take it back and ask whether they can state it to that standard, and explain their reasoning. If they can't, that's an honest answer — and better to know now than after a denial.
Why the reasoning is the whole ballgame
Veterans often assume a nexus letter wins on the doctor's title — that a specialist's signature outweighs a nurse practitioner's. It doesn't work that way. The Court has held that the probative value of a medical opinion comes from the reasoning that supports it, not from the credentials of the person who wrote it (Nieves-Rodriguez v. Peake, 22 Vet. App. 295 (CAVC 2008)). A three-line letter from a renowned surgeon that just asserts a conclusion can lose to a thorough, well-reasoned opinion from a treating nurse practitioner who explains the medicine and points at the records.
So when you hand your provider the brief, the part to emphasize isn't their qualifications. It's that they walk through why: what in the records supports it, how this condition develops, and why service remains at least as likely a cause as anything else.
What to do if your provider won't write one
Some won't. Some VA providers decline as a matter of practice, and some private doctors don't want to touch a claim. That isn't the end of it. A private independent medical examiner (IME) writes nexus opinions as part of their practice, and an accredited VSO or claims agent can point you toward options. Whatever you do, don't pay a company that promises a guaranteed nexus — a bought conclusion with no reasoning behind it is exactly the letter the VA discounts. For where the nexus sits among everything else a claim needs, see the Evidence That Wins guide.
This checklist is an educational aid, not legal or medical advice, and not a nexus letter. It does not write, supply, or substitute for a medical opinion — that must come from a qualified provider exercising their own clinical judgment, in their own words. Nothing here guarantees any outcome. Veteran Field Manual is an independent educational resource, not affiliated with, endorsed by, or representing the U.S. Department of Veterans Affairs or any government agency. Informational only, not legal, medical, or VA-accredited claims advice.