Nexus letter templates, by condition

A nexus letter is a medical opinion connecting your condition to your service. It is the piece most claims turn on, and the piece most often written in language VA discounts. Here is what it has to say — and a free drafter that builds the structure for your doctor to review and sign.

The phrase that matters most

VA's standard is “at least as likely as not” — a 50 percent or greater probability. Under 38 CFR § 3.102, when the evidence is evenly balanced, the tie goes to the veteran.

That is why the wording is not a formality. “Possibly related,” “may be related,” “could be related,” and “cannot rule out” all sit below the standard, and a rater is entitled to read them that way. A well-meaning doctor who writes “it is possible this is related to his service” has written a denial.

The four things every nexus letter must do

Regardless of condition or theory. A letter missing any one of these is the most common avoidable reason a claim is denied.

1.A statement that your records were reviewed
VA weighs a medical opinion partly on whether the clinician actually had the evidence in front of them. A letter that does not say what was reviewed reads as an opinion formed without the file.
2.A current diagnosis
Service connection requires a present disability. The letter should state the diagnosis plainly rather than describing symptoms and leaving the conclusion implied.
3.The phrase "at least as likely as not"
This is VA's evidentiary standard — a 50 percent or greater probability. Under 38 CFR § 3.102 the tie goes to the veteran, and this phrase is what places the opinion at or above that line. Softer wording ("possibly," "may be," "could be," "cannot rule out") sits below the standard and is a leading cause of denial.
4.A stated medical rationale
The reasoning behind the conclusion, not just the conclusion. An opinion that gives an answer without explaining the basis for it carries little weight, no matter how well-credentialed the signer.

Pick your condition

Each guide covers the theory that condition is usually claimed under, what the letter has to establish beyond the universal four, and the specific ways these letters get discounted.

Sleep Apnea

Most sleep apnea claims are won as a secondary condition, not as an in-service diagnosis.

Hypertension

For herbicide-exposed veterans hypertension may be presumptive — and a nexus letter may not be needed at all.

Depression

Depression is most often claimed secondary to a service-connected physical condition — chronic pain being the usual driver.

Migraines

Migraine claims turn on documented frequency and on the word "prostrating."

PTSD

PTSD claims usually turn on the stressor, not on the nexus — and the rules for proving a stressor differ by claim type.

Tinnitus

Tinnitus is established largely on your own credible report — the letter's job is the noise exposure and the continuity.

IBS

For Gulf War veterans IBS may be presumptive as a medically unexplained chronic multisymptom illness.

GERD

GERD is most often claimed secondary to a mental-health condition or to medication taken for one.

Lumbar Back Condition

A single documented in-service back complaint plus continuous symptoms can carry a lumbar claim without a nexus opinion.

Hearing Loss

Hearing loss claims are won on documented noise exposure — and normal hearing at discharge does not defeat them.

Radiculopathy

Radiculopathy is a separate rating from the spine condition that causes it — and it is routinely left unclaimed.

Anxiety

Anxiety is commonly claimed secondary to a service-connected physical condition.

Before you pay anyone for a letter

›You may not need one. If a presumption covers your service and condition, VA connects it without a medical link. Check that first — it is free and takes a minute.
›Your own treating doctor can write it. They already know your history, and a clinician with a treatment relationship is well positioned to give an informed opinion.
›A VSO can help for free. DAV, VFW, and the American Legion represent veterans at no charge and are the best deal in this system.

What nexus letters actually cost →

NexusVetClaims provides software, not legal representation or medical advice. We are not VA-accredited and never take a percentage of your benefits. A nexus letter is a medical opinion — only a qualified clinician who has evaluated you can provide one. Our drafter produces the framing and legal language; the medical judgment is your doctor's.