Trauma & Stress Disorders —
Expert Psychiatric Assessment

Comprehensive medico-legal assessment of trauma and stress-related psychiatric conditions. Our specialist psychiatrists provide CPR Part 35 compliant expert witness reports for solicitors across all areas of legal practice, including personal injury, clinical negligence, criminal matters, family proceedings, and asylum claims.

DSM-5 & ICD-11 Classifications Trauma & Dissociation Expertise CPR Part 35 Compliant Section 12 Approved

Trauma & Stress Disorders in Medico-Legal Practice

Trauma and stress-related disorders are frequent in medico-legal work and may arise after accidents, assaults, domestic abuse, workplace incidents, medical events, bereavement, childhood adversity, or displacement and persecution. Presentations can include intrusive memories, nightmares, hyperarousal, avoidance, negative changes in mood and cognition, emotional numbing, dissociation, and functional restriction affecting work, relationships, travel, and daily living.

In legal proceedings, accurate diagnosis and formulation are essential. Symptoms may overlap with depressive disorders, anxiety disorders, psychosis, substance effects, neurocognitive problems, and personality factors. A structured expert assessment clarifies diagnostic thresholds, severity, causation and contribution (including pre-incident vulnerability), treatment needs, prognosis, and evidence of functional impact.

Psychiatry Experts provides specialist psychiatric assessment across the full spectrum of trauma and stress disorders, offering clear, court-ready opinions on clinical presentation, consistency with records, risk and safeguarding where relevant, and evidence-based treatment recommendations (e.g., trauma-focused psychological therapies, pharmacological options, and rehabilitation planning).

Conditions in This Category

Post-Traumatic Stress Disorder (PTSD)

DSM-5 309.81 | ICD-11 6B40

A trauma-related condition characterised by intrusive re-experiencing (flashbacks, nightmares), avoidance, hyperarousal and negative changes in mood and cognition following exposure to a traumatic event. Medico-legal assessment focuses on trauma exposure criteria, symptom course over time, functional impact, comorbidity (depression, substance use), and prognosis with evidence-based treatment.

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Complex PTSD

ICD-11 6B41 (Complex PTSD)

Typically associated with prolonged or repeated trauma (often interpersonal), combining core PTSD symptoms with persistent difficulties in affect regulation, self-concept and relationships. Assessment addresses developmental context, chronicity, dissociation where present, functional restriction, and staged treatment needs and realistic timelines.

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Acute Stress Disorder

DSM-5 308.3 | ICD-11 6B42

Early trauma response occurring in the immediate aftermath of a traumatic event, with intrusion, avoidance, arousal and dissociative symptoms. In claims, assessment clarifies timing, severity, early functional impairment, evidence of recovery versus progression to PTSD, and appropriate early intervention and follow-up.

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Adjustment Disorder

DSM-5 309.xx | ICD-11 6B43

A stress-response condition linked to an identifiable psychosocial stressor, presenting with distress and functional impairment that is out of proportion to the stressor and does not meet criteria for another disorder. Medico-legal work often focuses on the nature and timing of the stressor, symptom trajectory, workplace impact, and expected resolution.

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Reactive Attachment Disorder

DSM-5 313.89 | ICD-11 6B44

A disorder of early childhood associated with severe neglect or deprivation, characterised by inhibited, emotionally withdrawn behaviour toward caregivers and limited positive affect. Assessment considers developmental history, safeguarding context, differential diagnoses (e.g., autism, intellectual disability), and functional needs.

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Disinhibited Social Engagement Disorder

DSM-5 313.89 | ICD-11 6B45

A childhood condition linked to insufficient care, marked by culturally inappropriate, overly familiar behaviour with unfamiliar adults and reduced reticence about safety boundaries. Medico-legal assessment focuses on developmental context, safeguarding, functional risk, and differentiation from behavioural or neurodevelopmental conditions.

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Prolonged Grief Disorder

DSM-5-TR (PGD) | ICD-11 6B42 (PGD)

Persistent and pervasive grief response following bereavement, characterised by intense longing or preoccupation with the deceased alongside significant functional impairment beyond expected cultural norms. Assessment addresses bereavement context, comorbidity (depression/PTSD), treatment options, and medico-legal implications in inquests and civil claims.

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Trauma-Related Dissociative Disorders

Dissociation (Trauma-Associated) | DSM-5/ICD-11 diagnostic frameworks

Dissociative symptoms such as depersonalisation, derealisation, amnesia, identity disturbance and “shutdown” responses can occur alongside or distinct from PTSD, often linked to severe or repeated trauma. Medico-legal assessment considers symptom phenomenology, triggers, functional impact, credibility and consistency with records, and specialist treatment needs.

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Our Assessment Approach

How We Assess

  • Comprehensive clinical interview (60–180 minutes)
  • Trauma history where clinically appropriate (with safeguards and pacing)
  • Symptom mapping: intrusion, avoidance, hyperarousal, mood/cognition changes, dissociation
  • Differential diagnosis: depression, anxiety, substance effects, neurocognitive/medical contributors
  • Validated tools where appropriate (e.g., PCL-5, CAPS-5, ITQ, PHQ-9)
  • Medical records & collateral information review
  • Functional impact: work, travel, relationships, self-care and daily living
  • Causation, contribution, prognosis, and evidence-based treatment recommendations
  • CPR Part 35 compliant expert report

Expert Selection

  • Adult General Psychiatrist PTSD, acute stress disorder, adjustment disorder, mixed anxiety/depression presentations
  • Trauma Specialist Psychiatrist Complex PTSD, chronic trauma responses, multi-morbidity and treatment resistance
  • Forensic Psychiatrist Criminal matters, vulnerability evidence, risk and complex presentation analysis
  • Child & Adolescent Attachment disorders, developmental trauma, safeguarding and school attendance impact
  • Clinical Psychologist Psychometrics, trauma-focused therapy suitability, structured treatment planning

Why Instruct Psychiatry Experts?

Specialist Trauma Expertise

Accurate diagnosis across PTSD, complex trauma responses, grief and dissociation.

CVs & Quotes in 1 Hour

Rapid response with expert CVs and fee estimates for trauma-related instructions.

Urgent Reports (1–4 Days)

Expedited turnaround for court deadlines and urgent trauma cases.

Causation & Contribution Clarity

Clear opinion on event linkage, vulnerability factors and realistic prognosis.

Nationwide & Remote

Face-to-face appointments across the UK plus remote video assessments.

Court-Ready Reporting

Structured medico-legal reports aligned with CPR Part 35 and expert duties.

Frequently Asked Questions

Instruct a Trauma & Stress Disorders Expert Today

CVs and quotes in 1 hour. Urgent reports in 1–4 days. Section 12 approved psychiatrists with extensive medico-legal experience.