Important: A nexus letter must be written and signed by a licensed medical professional — a physician, psychologist, or qualified clinician. claim.vet does not write nexus letters and does not use AI to generate medical opinions. This page connects veterans with independent, accredited medical providers who write nexus letters for VA disability claims.

What Is a Nexus Letter?

A nexus letter is a written medical opinion from a licensed physician that establishes a connection ("nexus") between a veteran's current diagnosed condition and their military service. VA rating decisions often turn on whether this connection has been adequately documented.

The VA standard

The VA requires that the medical evidence show the condition is "at least as likely as not" (50% or greater probability) related to service. A well-written nexus letter from a qualified provider addresses this exact standard, cites the veteran's medical records, and includes the physician's rationale and credentials.

What a good nexus letter includes

The physician's full credentials, license number, and specialty
Review of the veteran's service records and current medical records
The specific diagnosis and how it was reached
A clear opinion statement using the "at least as likely as not" language
The physician's medical rationale — why they believe there is a nexus
References to peer-reviewed medical literature when applicable
The letter on the physician's professional letterhead, signed and dated

Learn more: The Complete Guide to VA Nexus Letters

Recommended Nexus Letter Providers

These providers specialize in independent medical opinions (IMOs) and nexus letters for VA disability claims. claim.vet may earn a referral fee if you connect with a listed provider — this cost is never passed on to you.

REE Medical

DBQ Evaluations · Rating Increases

REE Medical connects veterans with independent licensed providers who complete Disability Benefits Questionnaires (DBQs) documenting how severe a condition is today. Best fit when you are already service connected and believe your rating is too low. REE says it charges a flat rate with no percentage of back pay.

DBQ evaluations

Rating increase focus

Free consultation

Explore a DBQ Evaluation → What Is a DBQ?

Neither provider is VA-accredited or files claims for you, and no provider can guarantee a VA decision.

How to Choose a Nexus Letter Provider

Before you engage any provider — including the ones listed above — verify these things independently. This is a medical service you're paying for; treat it like any other healthcare decision.

Verify licensure. Ask for the physician's name, license number, and state. Look them up on the state medical board website.
Confirm records review. A qualified nexus opinion requires the physician to actually review your service and medical records, not just take your word for it.
Ask about specialty match. A cardiologist writing a mental health nexus letter is a weaker opinion than a psychologist writing one.
Get written pricing. Legitimate providers publish or quote prices upfront. Be wary of anyone who won't quote a price before starting.
Read the sample. A good provider will share a redacted sample nexus letter so you can see the quality of their work.
Understand the guarantee. No provider can guarantee VA approval — nexus letters are one part of the evidence, not a decision.

Are You a Nexus Letter Provider?

If you're a licensed physician, psychologist, or medical clinician who writes independent medical opinions for VA disability claims, we'd like to list you here. Applications are reviewed for licensure and experience.

Apply to Be Listed →

Not Sure If You Need a Nexus Letter?

You may not need a nexus letter if your condition is already presumptively service-connected (PACT Act burn pit exposures, Agent Orange conditions, certain Gulf War illnesses, or other presumptive lists). You also may not need one if your VA C&P exam produced a favorable opinion.

Nexus letters are most valuable when:

Your VA claim was denied for lack of service connection
Your C&P exam produced a "less likely than not" opinion and you want to counter it
You're claiming a secondary condition and need to establish the causal link to your primary service-connected disability
You're claiming a condition that isn't on any presumptive list and requires proof of service connection

If you're unsure whether a nexus letter will help your claim, consider connecting with a VA-accredited attorney or claims agent first — they can assess your case and tell you exactly what evidence you're missing.

Get Free Case Review →

Find a VA Nexus Letter Provider