A VA disability claim succeeds or fails on evidence. The Department of Veterans Affairs does not decide a claim on a veteran's word alone. It weighs records: what the military documented during service, what doctors wrote afterward, and what connects the two. The Veterans Benefits Administration, which processes these claims, publishes its programs and resources on its own site, and that is also where veterans can find accredited representatives and office contacts.
Four kinds of evidence carry most claims: service treatment records, private medical records, lay statements from people who saw the condition, and a medical opinion linking the condition to service. Each is requested differently, and each has a common stumbling block. This guide explains what each type does and how to get it.
What evidence does VA actually need?
VA needs three things in most disability claims. First, a current diagnosis of a condition. Second, an in-service event, injury or illness that the record shows happened. Third, something that connects the two — usually a doctor's opinion that the condition is related to service. Claim handlers call that connection a nexus. Missing any one of the three is the most common reason claims are denied or delayed.
VA has a duty to help veterans gather federal records, including service treatment records held by the government. That duty does not extend fully to private records; for those, the veteran usually has to request them or sign a form letting VA do it. Knowing which side of that line a record sits on is the first practical step.
Service treatment records: what they are and how to get them
Service treatment records are the medical files created during a veteran's time in uniform. They include sick-call visits, hospital stays, dental records and, for many veterans, the separation exam. They matter because they document the in-service event or the first appearance of a symptom.
Most of these records now live with the National Archives, which stores military personnel and medical records after separation. A veteran can request their own records online through the Archives' veteran records portal, by mail using a signature, or by working with a VA office. The Veterans Benefits Administration site lists regional benefits office contacts for veterans who prefer to ask in person.
Common sticking points: records from older eras may be incomplete, and a fire at a federal records center damaged millions of Army and Air Force personnel files from past decades. If records are missing, VA can still decide a claim on alternative evidence — which is where the next two categories come in.
Private medical records and the authorization form
Private records are the files held by civilian doctors, hospitals and therapists. They establish the current diagnosis and show how the condition has progressed since service. They also give the examiner who reviews the claim something concrete to work from.
To let VA request these records directly, a veteran signs a authorization form — VA Form 21-4142 and, for records from federal medical facilities, the related companion form. The form names the provider, the facility and the dates of treatment. Vague entries slow everything down: a form that says "my family doctor" without an address will sit unresolved. The alternative is to request the records from the provider and submit copies with the claim. Providers may charge copying fees, and turnaround varies widely by facility.
Practical steps for this stage:
- List every provider seen for the claimed condition, with addresses and approximate dates.
- Complete one authorization form per provider rather than one for all of them.
- Keep copies of everything submitted; VA does not return original documents.
Buddy statements and lay evidence
Not everything important was written down. A squadmate who saw the injury, a spouse who watched symptoms worsen, or the veteran's own written account can all serve as lay evidence — statements from people without medical training. VA accepts these statements, and they carry particular weight when official records are missing or thin.
A useful lay statement is specific. It names dates or time periods, places, what happened, and what the witness saw or heard. A statement that just says "he was hurt badly" adds little. VA provides a standard form for statements — VA Form 21-10210 covers lay and witness evidence — and a plain signed letter is also accepted. The veteran's own statement, sometimes called a personal statement, works best when it walks through the condition's history in order.
Nexus opinions: the link that ties it together
A nexus opinion is a doctor's written judgment that a current condition is at least as likely as not related to an in-service event. This is the piece lay evidence cannot supply. It can come from a VA examination during the claims process, from a treating private physician, or from an independent medical examiner.
For a treating physician's opinion to be useful, the doctor needs the file: the service records, the diagnosis, and a summary of the in-service event. Handing a doctor a blank form and asking "is this related to service?" rarely produces a usable opinion. Veterans who hire help at this stage should confirm the helper is accredited; the VA-accredited representatives list is available through the Veterans Benefits Administration, and our guide to VA benefits attorney accreditation, fees and when hiring helps explains what accreditation requires. Readers following this should also see VA Benefits Attorney: Accreditation, Fees and When Hiring Helps.
Where the process goes after the file is complete
Once the evidence is assembled, VA reviews the claim, may schedule an examination, and issues a decision that explains what it granted and why. If the decision is unfavorable, the evidence rules continue to matter: an appeal built on new records follows the same gathering steps described above. Veterans filing long after service face a slightly different evidence picture, which our guide to applying for VA disability benefits years after service walks through. Our Legal & Claims coverage follows the process end to end. We covered a connected angle in Applying for VA Disability Benefits Years After Service: A Guide.
What this means in practice: the strongest claims are built before submission, not after a denial. Identify the three legs — diagnosis, in-service event, nexus — then chase the record for each one. Start with federal records VA can pull itself, sign precise authorizations for private providers, and collect specific statements from people who were there.
Where official help lives
The Veterans Benefits Administration publishes its programs, contact numbers and accredited-representative resources at its main benefits site, and veterans can call VBA support or visit a regional benefits office for help locating records. Accredited representatives — including Veterans Service Organization officers who work at no charge — can file records requests on a veteran's behalf. That is the official next step: confirm the representative's accreditation, then let the request process run.
