Quick reference
- When to use
- Use F43.21 when the client's presentation is directly linked to an identifiable stressor or traumatic event and meets the specific criteria for Adjustment Disorder with Depressed Mood. Document the qualifying event or stressor clearly.
- Duration
- PTSD: symptoms >1 month post-trauma. Acute Stress: 3 days to 1 month. Adjustment Disorders: onset within 3 months of stressor, resolves within 6 months after stressor ends. Reassess timeline regularly.
- Session codes
- Pair with CPT 90837 (60-min, preferred for trauma processing), 90834 (45-min for stabilization), or 90791 (initial evaluation). Add 96127 for PCL-5 or PHQ-9 screening. EMDR/exposure sessions often require 90837.
- Key indicators
- Intrusive memories or flashbacks • Avoidance of trauma reminders • Negative mood or cognition changes • Hyperarousal or hypervigilance • Sleep disturbance • Dissociative symptoms • Clear temporal link to stressor
What F43.21 represents
The most commonly used adjustment disorder subtype, featuring predominantly depressive symptoms in response to a stressor. Symptoms don't meet full MDD criteria.
Key diagnostic criteria
- All adjustment disorder criteria met
- Predominant symptoms: depressed mood, tearfulness, hopelessness
- Doesn't meet criteria for MDD or persistent depressive disorder
Documentation essentials
Document the stressor, depressive symptoms, and functional impact. Explain why MDD criteria aren't met.
Differential diagnosis
Key distinction from MDD: fewer symptoms, clear stressor relationship, shorter duration. Consider normal grief.
Treatment planning
Brief, focused psychotherapy. Behavioral activation. Support and psychoeducation.
Insurance & billing
Well-accepted. Document clear stressor and symptom relationship.
Updates & changes
No significant changes anticipated.
Documentation pitfalls
Monitor for progression to MDD. Reassess if symptoms persist beyond 6 months after stressor resolution.
References
- American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.).