Mood Disorders —
Expert Psychiatric Assessment

Comprehensive medico-legal assessment of depressive and bipolar spectrum conditions. Our specialist psychiatrists provide CPR Part 35 compliant expert witness reports for solicitors across all areas of legal practice.

DSM-5 & ICD-11 Classifications Validated Mood Instruments CPR Part 35 Compliant Section 12 Approved

Mood Disorders in Medico-Legal Practice

Mood disorders are among the most frequently encountered psychiatric presentations in medico-legal work. They include depressive disorders (single-episode, recurrent and persistent forms) and bipolar disorders (type I and type II), where periods of depression may alternate with hypomania or mania.

In legal proceedings, careful diagnosis matters. Depression can arise after an accident, assault, bereavement, workplace stress, clinical negligence, or chronic pain; bipolar spectrum presentations may be mislabelled as unipolar depression, which can significantly affect treatment recommendations, prognosis, and functional impact.

Psychiatry Experts provides specialist assessment across the full spectrum of mood disorders, including establishing diagnosis using DSM-5 and ICD-11 frameworks, analysing causation and contribution (including vulnerability factors), assessing severity and day-to-day functioning, and providing clear, court-ready expert evidence.

Conditions in This Category

Major Depressive Disorder

DSM-5 296.2x / 296.3x | ICD-11 6A70 / 6A71

A depressive disorder characterised by persistent low mood and/or loss of interest, with associated cognitive, physical and functional symptoms. In medico-legal settings, assessment focuses on diagnostic thresholds, timeline, causation, severity, treatment needs, and prognosis.

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Bipolar Affective Disorder

DSM-5 296.xx (Bipolar I) / 296.89 (Bipolar II) | ICD-11 6A60 / 6A61

An episodic mood disorder involving depressive episodes and periods of elevated mood (hypomania/mania). Medico-legal assessment commonly addresses misdiagnosis as “unipolar depression”, treatment history, relapse risk, functional impairment, and occupational safety considerations.

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Persistent Depressive Disorder (Dysthymia)

DSM-5 300.4 | ICD-11 6A72

A chronic, persistent depressive mood lasting at least 2 years in adults (often with fluctuating severity). In claims, the key issues are long-term functioning, pre-incident vulnerability, contribution factors, and realistic treatment outcomes.

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Cyclothymic Disorder

DSM-5 301.13 | ICD-11 (Bipolar spectrum presentation)

A longstanding pattern of fluctuating subthreshold hypomanic and depressive symptoms. Medico-legal assessment often focuses on timeline, functional variability, diagnostic boundaries, comorbidity (e.g., anxiety/substance use), and whether a bipolar-spectrum formulation better explains the presentation.

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Postnatal Depression

DSM-5 (MDD with peripartum onset specifier) | ICD-11 (perinatal specifier)

Depressive episodes occurring during pregnancy or following childbirth. Medico-legal questions can include functional impact, safeguarding/parenting considerations, treatment access and adherence, and prognosis, while carefully separating perinatal onset from broader vulnerability and psychosocial stressors.

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Seasonal Affective Disorder

DSM-5 (with seasonal pattern specifier) | ICD-11 6A80.4

A recurrent seasonal pattern of mood episodes (most commonly winter depression). Assessment focuses on verifying the temporal pattern, differential diagnosis (including bipolar spectrum), treatment response (light therapy/medication), and functional impact on work and daily life.

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Our Assessment Approach

How We Assess

  • Comprehensive clinical interview (60–180 minutes)
  • Mood history: onset, triggers, course, relapses and remissions
  • Differential diagnosis: unipolar vs bipolar spectrum, anxiety, substance effects
  • Validated tools where appropriate (e.g., PHQ-9, BDI-II, MDQ)
  • Medical records & collateral information review
  • Functional impact across work, relationships, self-care and daily living
  • Causation, contribution, prognosis, and treatment recommendations
  • CPR Part 35 compliant expert report

Expert Selection

  • Adult General Psychiatrist Major depression, dysthymia, seasonal pattern presentations
  • Mood Disorders Specialist Bipolar spectrum, treatment resistance, complex course
  • Perinatal Psychiatrist Peripartum/postnatal depression, safeguarding considerations
  • Forensic Psychiatrist Criminal proceedings where mood instability is relevant
  • Clinical Psychologist Psychometrics, therapy suitability, functional formulation

Why Instruct Psychiatry Experts?

Specialist Mood Expertise

Accurate diagnosis across depressive and bipolar spectrum presentations.

CVs & Quotes in 1 Hour

Rapid response to instruction enquiries with expert CVs and fee estimates.

Urgent Reports (1–4 Days)

Expedited turnaround for court deadlines and urgent cases.

Clear Causation Analysis

Structured opinion on cause, contribution, vulnerability factors and prognosis.

Nationwide & Remote

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

CPR Part 35 Compliant

All reports meet court standards, prepared by experienced witnesses.

Frequently Asked Questions

Instruct a Mood Disorders Expert Today

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