VA Disability for Military Sexual Trauma (MST): Claims and Evidence Guide (2026)

How the VA Defines MST

Military sexual trauma is defined by statute at 38 USC 1720D and in VA policy as experiences of sexual assault or repeated, threatening sexual harassment that occurred during active duty, active duty for training, or inactive duty training. MST can affect veterans of any gender, rank, branch, or era. It is not a diagnosis or a specific condition - it is the experience that serves as the stressor or precipitating event for a range of mental and physical health consequences.

Understanding that distinction is essential to navigating the claims process. A veteran does not claim "MST" as a ratable disability; rather, they claim a specific condition (PTSD, depression, anxiety, and so on) and identify MST as the in-service event that caused it.

Conditions That Can Arise From MST

MST is associated with a broad range of subsequent mental and physical health conditions. Commonly claimed conditions include:

• Post-traumatic stress disorder (PTSD) - the most frequently claimed MST-related condition
• Major depressive disorder
• Generalized anxiety disorder
• Panic disorder
• Substance use disorders - alcohol or drug use developed as a coping response
• Eating disorders
• Sleep disorders - insomnia, nightmares, sleep apnea in some cases
• Sexual dysfunction
• Chronic pain conditions including fibromyalgia and migraine in some cases

Each condition should be claimed separately and supported with appropriate medical documentation. A single psychological evaluation can often identify and link multiple conditions to the MST stressor.

The Relaxed Evidentiary Standard

Recognizing that MST is frequently not reported at the time it occurs - due to shame, fear of retaliation, unit dynamics, and command-level barriers - the VA established a unique evidentiary framework for MST-based PTSD claims at 38 CFR 3.304(f)(5). The regulation provides that, when a PTSD claim is based on in-service personal assault, evidence from sources other than the veteran's service records may corroborate the veteran's account of the stressor.

This is a meaningful departure from the stricter stressor-corroboration rules that apply to most other PTSD claims. Rather than requiring documentary proof that the specific event occurred, the VA considers the full picture of the veteran's behavior, medical history, and lay evidence to determine whether the account of the in-service trauma is credible.

What Counts as a Marker

Under 38 CFR 3.304(f)(5), VA adjudicators look for "markers" - indicators in the record that something traumatic happened, even without a direct report of the event. Commonly recognized markers include:

Service Record Markers

• Requests for transfer to a new assignment or unit
• Decline in duty performance or disciplinary issues that appeared after the claimed event
• Episodes of AWOL or UA
• Changes in rating or efficiency reports
• Early separation or discharge

Medical Markers

• Visits to sick call for unexplained somatic complaints
• Gynecological visits, pregnancy tests, STI testing
• Emergency room visits for trauma, injury, or intoxication
• Mental health encounters - even if the reason is vaguely documented

Behavioral Markers

• Sudden changes in mood, sleep, or weight
• New substance use or escalation of existing use
• Withdrawal from social activities
• Avoidance of certain people, places, or units
• Self-harm or suicidal behaviors

Lay Evidence Markers

• Statements from fellow service members who observed changes
• Statements from family members describing the veteran before and after service
• Statements from clergy, counselors, or close friends who were told about the event
• Contemporaneous letters, journals, or emails that reference the trauma

VA Resources for MST Survivors

Building the Evidentiary Record

Well-developed MST claims typically include:

• A veteran's personal statement - as much detail as the veteran is comfortable providing; it does not need to be exhaustive or re-traumatizing
• Service treatment and personnel records - for adjudicators to identify markers
• Post-service mental health records - therapy notes, psychiatric evaluations, prescribed medications
• Psychological evaluation (IMO) - a DSM-5 diagnostic evaluation that links the current condition to the MST stressor
• Lay statements - from service members, family, friends, clergy, or anyone who observed markers
• VA MST coordinator engagement - which can help identify supporting records

A common and important point: a veteran does not have to prove beyond a reasonable doubt that MST occurred. The standard remains "at least as likely as not." Combined with the relaxed evidentiary framework at 3.304(f)(5), this means a credible account plus markers in the record is often sufficient to establish the in-service stressor.

The Role of a Psychological Evaluation

A psychological evaluation conducted by a licensed psychologist or psychiatrist provides several pieces the VA rater needs:

• A current DSM-5 diagnosis based on structured clinical interview and validated instruments
• A link to the MST stressor - how the condition is consistent with the trauma described
• An assessment of functional impairment - social, occupational, and daily functioning
• A symptom severity rating that aligns with the General Rating Formula for Mental Disorders under 38 CFR 4.130
• An opinion using VA-preferred phrasing - "at least as likely as not" connected to the in-service event

The evaluation process itself can be conducted in a way that is trauma-informed and minimizes re-traumatization. Experienced evaluators limit the scope of the narrative to what the veteran is willing to share, focus on clinical symptom documentation, and provide the report in a format the VA can use directly.

Filing the Claim

MST-based claims are filed on the same VA Form 21-526EZ used for any other disability claim. When the claim involves PTSD based on MST, an additional form - VA Form 21-0781a, "Statement in Support of Claim for Service Connection for Posttraumatic Stress Disorder (PTSD) Secondary to Personal Assault" - provides a structured way to describe the incident and identify markers.

Key practical tips:

• Request your complete service and personnel records early - markers often appear in administrative documents rather than medical ones
• Engage a VA MST coordinator at your regional office for guidance
• Consider working with a VSO or accredited attorney experienced with MST claims
• Ensure your psychological evaluation directly addresses the MST stressor and the current diagnosis
• Submit lay statements from anyone who can describe observed behavioral changes