Quick reference
- When to use
- Use F31.9 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 F31.9 represents
Used when bipolar features are present but insufficient information exists for a more specific diagnosis. Common in initial evaluations or when mood history is unclear.
Key diagnostic criteria
Clinical evidence of bipolar spectrum mood disturbance without sufficient information for specific subtype classification.
Documentation essentials
Document observed mood symptoms. Plan for longitudinal assessment. Consider collateral information.
Differential diagnosis
Must differentiate from other mood disorders as more information becomes available.
Treatment planning
Mood stabilization while completing assessment. Avoid antidepressant monotherapy pending clarification.
Insurance & billing
Acceptable for initial evaluation. Update diagnosis as assessment progresses.
Updates & changes
No significant changes anticipated.
Documentation pitfalls
Don't leave as permanent diagnosis. Gather sufficient history for specific subtype classification.
References
- American Psychiatric Association. (2022). Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.).