Most PTSD denials are not about the diagnosis. They are about the stressor - the in-service event the claim rests on. Under 38 CFR 3.304(f), the VA needs credible supporting evidence that the claimed stressor occurred, and what satisfies that requirement depends entirely on the type of stressor. Our overview of PTSD service connection explains how this element fits with the other two.
Combat-related stressors
If the evidence establishes that a veteran engaged in combat with the enemy and the claimed stressor is related to that combat, the veteran's own lay testimony alone may establish the stressor, so long as it is consistent with the circumstances, conditions, and hardships of service and there is no clear and convincing evidence to the contrary.
Evidence of combat participation can come from decorations and awards, unit records, deployment history, and military occupational specialty, among other sources.
Fear of hostile military or terrorist activity
The regulation contains a separate provision for stressors related to fear of hostile military or terrorist activity. If a VA psychiatrist or psychologist - or one contracted by the VA - confirms that the claimed stressor is adequate to support a PTSD diagnosis and that the symptoms relate to it, lay testimony alone may establish the stressor, again provided it is consistent with the circumstances of service.
This provision matters for veterans who served in a hostile environment without a documented combat engagement: convoy duty, base attacks, and improvised explosive device threats are the familiar examples.
Where veterans start
Every case is different, and there is no obligation at any step. When veterans want to understand what their records actually support, these are the two most common starting points:
- Medical records review
A licensed physician reviews your records for a $250 flat fee and identifies which conditions the available evidence may support. The fee is refunded in full if nothing supportable is identified.
- Individual Psychological Evaluation Package
A telehealth evaluation with a psychologist licensed in your state. It includes a one-on-one evaluation of your history, symptoms, and functional impact, a DBQ when clinically appropriate, and a nexus opinion section when the evaluation supports one. It starts with a free screening - you pay nothing unless a full evaluation appears clinically appropriate.
Stressors requiring corroboration
Outside those categories, the stressor generally must be corroborated by something beyond the veteran's own statement. Useful sources include:
- Unit histories, morning reports, and after-action reports
- Service treatment records and personnel records
- Line-of-duty determinations, incident reports, and accident investigations
- Statements from fellow service members who witnessed or knew of the event
- Contemporaneous letters, journals, or photographs
Personal assault and military sexual trauma
The regulation recognizes that assault-related stressors are frequently never reported through official channels, and it allows evidence from sources other than service records. Records from law enforcement, rape crisis centers, mental health counseling, hospitals, or physicians may be considered, as may statements from family, roommates, clergy, or fellow service members.
Evidence of behavior change after the event carries particular weight: requests for transfer, a sudden decline in performance, substance use, unexplained economic or social changes, or new mental health symptoms appearing in the record. A medical opinion may be sought on whether that behavior change indicates the claimed event occurred.
How stressor evidence and medical evidence work together
Stressor evidence and medical evidence answer different questions. The first establishes that something happened; the second addresses whether the current condition is linked to it. A clinician can describe how the reported history aligns with the documented record and with recognized diagnostic criteria, but cannot substitute for corroboration the regulation requires.
That is why we look at the records first. A paid medical records review identifies what the file already supports - and what is still missing - before anything is written. For an in-depth look at the wider evidentiary picture, see our guide to the evidence a mental health claim rests on.
Patriot NEXUS Letters provides independent medical evidence, not legal representation or claim filing.