F32.0 — Major Depressive Disorder, Single Episode, Mild

Clinical Description

F32.0 covers a single episode of major depressive disorder with mild symptom severity. The patient meets DSM-5 criteria for MDD but functional impairment is limited. Documentation should establish symptom count, duration, and the basis for a mild severity rating.

Key Symptoms to Document

When using F32.0, your documentation should reference these symptoms:

• Depressed mood most of the day, nearly every day
• Diminished interest or pleasure in activities (anhedonia)
• Fatigue or loss of energy
• Difficulty concentrating or making decisions
• Insomnia or hypersomnia
• Feelings of worthlessness or inappropriate guilt

Common Interventions to Document

Evidence-based interventions typically documented with this diagnosis:

• Cognitive Behavioral Therapy (CBT)
• Behavioral Activation
• Supportive psychotherapy
• Psychoeducation on depression
• Consideration of antidepressant medication (SSRI) if symptoms persist

CPT Code Pairings

Common CPT codes used when billing with F32.0:

• 90791 — Psychiatric diagnostic evaluation
• 90834 — Individual psychotherapy, 45 minutes
• 90837 — Individual psychotherapy, 60 minutes
• 96127 — Brief emotional/behavioral assessment (e.g., PHQ-9)

Documentation Tips

• Document the specific number of DSM-5 criterion symptoms present (minimum 5 of 9) and their duration (at least 2 weeks).
• Clearly justify 'mild' severity — note that the patient has few symptoms beyond the minimum required and functional impairment is minor.
• Record that this is a first (single) episode; document absence of prior depressive episodes.
• Include validated screening tool scores (e.g., PHQ-9 score 5-9) to support the mild designation.
• Note the presence or absence of suicidal ideation with a structured risk assessment.

Differential Diagnosis Considerations

When documenting F32.0, consider and rule out:

• Adjustment disorder with depressed mood (F43.21)
• Persistent depressive disorder / Dysthymia (F34.1)
• Bipolar disorder, depressed phase (F31.x)
• Grief reaction or bereavement (Z63.4)
• Depressive disorder due to a medical condition (F06.31)

Screening Tools

Standardized measures commonly used with this diagnosis:

• PHQ-9 (Patient Health Questionnaire-9)
• BDI-II (Beck Depression Inventory-II)
• Columbia Suicide Severity Rating Scale (C-SSRS)
• PHQ-2 (brief screen)