MST Claim Process

By Shirley Chia. Published 2026-05-30. Source: 38 CFR 3.304(f)(5), 38 USC 5107(b).

Why MST claims have their own rule

PTSD service connection generally requires three elements: a current diagnosis, an in-service stressor, and a medical nexus linking the diagnosis to the stressor (the Hickson v. West, 12 Vet. App. 247 (1999), three-element test). For most stressors, the in-service element is proved through service records — a combat record, a documented MVA, a casualty report. For MST, contemporaneous service records often do not exist. Historical reporting rates for in-service sexual assault have been documented at single-digit percentages, and even reported assaults frequently did not produce records that the VA could later locate decades after the event.

The 2002 rulemaking that produced 38 CFR 3.304(f)(5) recognized that requiring traditional in-service stressor evidence would effectively bar MST claims. The rule, now codified at (f)(5), explicitly permits alternative evidence. The list of accepted markers has expanded through subsequent VA guidance and case law.

The marker categories

Medical and counseling records

• Records from rape crisis centers (military, civilian, or post-service).
• Mental health counseling records (including post-service civilian counseling that addresses the in-service event).
• Hospital records, including emergency department visits.
• Pregnancy tests.
• Tests for sexually transmitted diseases or sexually transmitted infections.
• Records from the Family Advocacy Program or equivalent military social services.

Lay statements

• Statements from family members, including parents, siblings, spouse, or partner contemporaneous to the in-service period.
• Statements from roommates, barracks-mates, or close fellow servicemembers.
• Statements from clergy or chaplains the veteran spoke with at the time.
• Statements from mental health counselors, civilian or military.
• Statements from later mental health providers who treated the veteran for symptoms.

For lay statement standards see the lay statements and buddy letters guide. Buchanan v. Nicholson, 451 F.3d 1331 (Fed. Cir. 2006), holds that the absence of contemporaneous medical records does not render lay testimony incredible, which is foundational for MST claims relying on later-developed marker evidence.

Behavioral changes documented in service records

Even when the assault is unreported, the assault's effects often appear in service records as behavioral changes. The VA explicitly accepts these as markers:

• Depression, anxiety, panic attacks documented in medical visits.
• Substance abuse — alcohol or drug-related incidents post-event.
• Requests for transfer to a different unit, base, or assignment.
• Drops in performance evaluation (NCOER, OPR, Fitness Report) compared to pre-event period.
• Increased medical visits with vague or psychosomatic complaints.
• Increased religious activity.
• Divorce, broken relationships, or sudden marriage.
• Disciplinary actions including UCMJ Article 15, court-martial, or letters of reprimand for behavior changes.
• Early separation or hardship discharge requests.

The Federal Circuit in AZ v. Shinseki, 731 F.3d 1303 (Fed. Cir. 2013), held that the absence of a contemporaneous report of sexual assault is itself NOT competent evidence that the assault did not occur — the rater may not infer non-occurrence from non-reporting in the MST context. The holding is crucial because it removes a common VA RO reasoning pattern from MST claim adjudication.

The MST Coordinator program

Every VA Regional Office and every VA Medical Center has a designated MST Coordinator. Their role is to provide a trauma-informed entry point. Practical functions:

• Initial intake on a survivor-controlled basis, without the veteran needing to retell the trauma to a general claims clerk.
• Coordination with the VAMC MST Coordinator for clinical care, separately tracked from disability claim processing.
• Assistance assembling marker evidence — pointing the veteran to records to request from rape crisis centers, military discipline files, family members.
• Connection to peer support and Vet Centers.

Contact a MST Coordinator through the va.gov MST page or by calling the regional office and asking specifically for the MST Coordinator.

The diagnostic and rating pathway

Step 1: Current PTSD or other mental health diagnosis

For PTSD claims under 3.304(f), the diagnosis must come from a qualified mental health professional applying DSM-5 criteria. Most PTSD diagnoses for MST come through a VA C&P exam conducted by a contracted psychologist or psychiatrist, sometimes through a private examiner via Compensation Service or veteran-arranged independent medical examination. The veteran may also have an existing diagnosis from a VA Medical Center provider — that diagnosis carries equal weight when documented in VA records.

If the diagnosis is not PTSD but a related condition (major depressive disorder, generalized anxiety disorder, substance use disorder), the claim is filed for that condition under 3.303 with MST as the in-service event.

Step 2: Marker evidence supports in-service occurrence

The veteran or representative assembles available markers and submits them with the claim or in response to a development letter. The Veterans Benefits Administration develops additional markers under its duty to assist (38 CFR 3.159) — requesting performance evaluations, disciplinary records, medical records from the relevant period.

Step 3: C&P examiner addresses occurrence

Under VBA policy, the MST C&P examiner is specifically tasked with addressing whether the markers support occurrence of the in-service stressor. The examiner is NOT making a credibility determination — the rater makes credibility findings — but the examiner offers a medical opinion as to whether the documented behavioral pattern is consistent with the alleged event.

Step 4: Liberal construction under 38 USC 5107(b)

If the evidence for and against the claim is in approximate balance, the benefit of the doubt goes to the veteran. The rule is statutory under 38 USC 5107(b) and the regulatory implementation is at 38 CFR 3.102. For MST claims, where direct evidence often does not exist on either side, the benefit-of-the-doubt rule is decisive in most successful claims.

Rating the PTSD once service-connected

Service connection establishes the link. Rating is then under 38 CFR 4.130 DC 9411, the standard PTSD bracket system:

• 0% — diagnosis without continuous medication or symptom interference.
• 10% — mild symptoms, transient or stress-induced.
• 30% — occupational and social impairment with occasional decrease in work efficiency.
• 50% — occupational and social impairment with reduced reliability and productivity.
• 70% — occupational and social impairment with deficiencies in most areas (work, school, family relations, judgment, thinking, mood).
• 100% — total occupational and social impairment.

See the full bracket criteria in the PTSD VA rating criteria guide.

Worked example

Sources cited in this article

• 38 CFR 3.304(f)(5) — Direct service connection; PTSD based on personal assault
• 38 CFR 3.102 — Reasonable doubt
• 38 USC 5107(b) — Claimant responsibility; benefit of the doubt
• 38 USC 1720D — Counseling and treatment for sexual trauma
• AZ v. Shinseki, 731 F.3d 1303 (Fed. Cir. 2013) (absence of contemporaneous report is not competent evidence of non-occurrence).
• Macklem v. Shinseki, 24 Vet. App. 63 (2010) (development of markers as part of duty to assist in MST claims).
• Hickson v. West, 12 Vet. App. 247 (1999) (three-element test for service connection).
• Buchanan v. Nicholson, 451 F.3d 1331 (Fed. Cir. 2006) (absence of contemporaneous records does not render lay testimony incredible).

VetDisabilityCalc is an independent reference site. We are not VA-accredited and we do not prepare or present VA claims. This guide is reference material and is not legal advice.