ICD-10 Code F43.2 – Adjustment disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F43.2 – Adjustment disorders
What it is
F43.2 identifies adjustment disorders, which are emotional or behavioral reactions to an identifiable stressor. The response is out of proportion to the stressor and causes distress or problems in daily functioning.
Clinical signs
Common features include anxiety, depressed mood, irritability, low motivation, or conduct changes after a stressful event. Clinical features vary; refer to documentation for the specific reaction and its impact on functioning.
When to use this code
Use F43.2 when the record documents a maladaptive response to a clear stressor, such as a relationship change, job loss, or another life event. The provider should link the symptoms to the stressor and note resulting impairment. Check documentation if the note does not clearly distinguish this from another mental health diagnosis.
Do not use for
Do not use this code for normal stress reactions without documented impairment, or when the record supports a different primary mental disorder. If the stress-related condition is described more specifically, code the documented subtype instead.
Coding tip
Look for both the stressor and the functional impact in the note before assigning F43.2.