Why VA Discounts Good Nexus Letters (and How to Avoid It)

The Letter Was Right. It Still Didn’t Help.

Veterans ask their private doctors, nurse practitioners, psychologists, physical therapists, and chiropractors for nexus letters and Disability Benefits Questionnaires (DBQs) all the time. Most clinicians want to help. But a well-meaning letter can still carry little weight with VA, and not because the clinician was wrong. Usually the letter did not show the reviewer what they needed to see.

This article explains what VA is actually asking a medical provider to do, the most common reasons opinions get discounted, and a simple structure for writing one that holds up. It is written for clinicians, but veterans can hand it to their provider.

What VA Is Asking You to Decide (and Not Decide)

VA is asking for your medical opinion on a medical question: is the veteran’s current condition related to an event, injury, or illness in service, or to a condition that is already service-connected? The legal decision about whether to grant service connection and what rating to assign belongs to VA, not to you. Your job is to give a clear, honest, well-reasoned medical opinion.

The Standard: “At Least As Likely As Not”

VA generally looks for whether it is “at least as likely as not” that a condition is related to service. In plain terms, that is a probability of 50% or greater. It is a lower bar than “reasonable medical certainty,” and lower than many clinicians assume.

This matters because careful clinicians often hedge. Phrases like “could be related,” “possibly,” or “cannot rule out” read as less than 50%, even when the provider’s real opinion meets the standard. If your honest opinion is that it is at least as likely as not, say so in clear terms. If your honest opinion is that it is less likely than not, say that too and explain why. An honest, reasoned opinion in either direction is more useful than a vague one.

5 Common Reasons Opinions Get Discounted

A Simple Structure: Credentials, Records, Rationale

A strong opinion usually has three parts, followed by a clear conclusion:

Then state your conclusion, using the “at least as likely as not” language only if it reflects your genuine opinion. Putting the conclusion after the reasoning, rather than before it, keeps the reviewer focused on the “why.”

Do You Need a Nexus Letter, a DBQ, or Both?

A DBQ is a structured form that captures current clinical findings and severity in the format VA rating criteria use. VA accepts DBQs completed by private providers. Most DBQ forms do not include a causation opinion, so a separate nexus letter is often needed when causation or aggravation is the open question. Always pull the current version of the specific DBQ for the condition from VA rather than reusing an old copy.

Practical Notes

• Stay within your scope of practice and specialty. If the condition is outside it, say so or refer out.
• It is appropriate to charge a reasonable fee for the time it takes to review records and prepare an opinion.
• Never promise a veteran a claim outcome. You control the quality of your opinion, not how VA weighs it against the rest of the evidence.
• This article is educational. Your clinical judgment, and your own legal and compliance advice, come first.