Quick reference
- When to use
- Use F31.4 when the client has an established or newly diagnosed bipolar disorder with the current episode matching this code's specifier. Always document history of manic episodes for Bipolar I. Never assign without confirming episode polarity.
- Duration
- Manic episodes: minimum 7 days (or any duration if hospitalized). Hypomanic episodes: minimum 4 consecutive days. Depressive episodes: minimum 2 weeks. Track mood longitudinally with mood charts.
- Session codes
- Pair with CPT 90834/90837 for therapy sessions. Medication management: 99213/99214. Add 96127 for mood screening tools (MDQ, PHQ-9). Crisis: 90839. Consider 90847 for family psychoeducation.
- Key indicators
- Mood episodes (manic, hypomanic, or depressive) • History of at least one manic episode (Bipolar I) • Elevated energy + decreased sleep need • Grandiosity • Pressured speech • Risk-taking behavior • Cycling pattern
What F31.4 represents
Severe depressive episode in the context of Bipolar I disorder. Carries higher suicide risk than unipolar depression and requires careful medication management.
Key diagnostic criteria
- History of at least one manic episode
- Current severe depressive episode
- Marked functional impairment
- No psychotic features
Documentation essentials
Document depressive severity, bipolar history, safety assessment, and medication management.
Differential diagnosis
Critical to differentiate from unipolar severe depression. Treatment differs significantly.
Treatment planning
Mood stabilizers, quetiapine, or lurasidone for bipolar depression. Avoid antidepressant monotherapy. IPT adapted for bipolar.
Insurance & billing
Strong medical necessity. Document both depressive severity and bipolar history.
Updates & changes
Monitor for updates on bipolar depression pharmacotherapy.
Documentation pitfalls
Never treat with antidepressant alone. Always document manic episode history.
References
- American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.).