Match the evidence to the unanswered question
Four questions sit inside most claims. What condition is there? What happened in service, or which service-connected condition is involved? What connects them? How bad is it, during the period that matters?
Different evidence answers different ones. The commonest mistake is sending more of what you already proved.
| Evidence | Usually good for | Usually leaves open |
|---|---|---|
| Diagnosis and treatment records | The condition, testing, treatment, chronology | The connection to service |
| DBQ | Structured findings, symptoms, functional effect | A full explanation of the medical nexus |
| Reasoned medical opinion | Causation or aggravation, when the clinician explains it | Other elements, and severity over time |
| Personal or witness statement | Firsthand observation, onset, frequency, daily effect | A medically complex diagnosis or cause |
| Service and personnel records | Events, dates, duties, exposure | The present diagnosis and its cause |
| Environmental and contamination records | That a place was contaminated, with what, and when | Whether it caused your condition |
| C&P report | The findings and opinions VA asked for | Everything the examiner was not asked about |
Use the denial as the specification
Read what the decision says was missing, then get evidence that answers that. If VA conceded the diagnosis and denied on nexus, another copy of the diagnosis changes nothing, however thick the envelope.
VA's own evidence guide is worth reading alongside your decision's stated reasons.
Accuracy beats volume
Describe what is true, including the parts that do not help. Evidence that overstates is worth less than evidence that holds up, and treatment decisions belong with your clinician rather than with your claim.
Getting hold of it, and getting it there
Two steps that are easy to skip and expensive to skip.
Your private medical records — VA makes an initial request and one follow-up for anything held outside the Federal government, then decides on what it has. The regulation says you are ultimately responsible for providing it. For most claims this is the single highest-value thing you can do yourself.
Researching a toxic exposure — if your condition is presumptive you do not have to prove exposure at all, so that is the first thing to check. If it is not, there are four public sources that document what was at a given installation and when, and one element they cannot supply.
Getting documents to VA — there are two online tools and they are not interchangeable, and the one that keeps a receipt is the one worth using.
Next: find the right forms · request your C-File · prepare for an exam
Rules and forms change, and exceptions apply. Follow the instructions on your own decision letter and the linked governing sources. This site does not track your deadlines or file anything for you.
Reviewed October 6, 2026