F31Header code — not billable
Bipolar disorder
- Chapter
- 5. Mental, Behavioral and Neurodevelopmental disorders
- Category
- F31
- Effective date
- October 1, 2026
Related codes in category F31
F31.0Bipolar disorder, current episode hypomanicYesF31.1Bipolar disorder, current episode manic w/o psych featuresF31.10Bipolar disord, crnt episode manic w/o psych features, unspYesF31.11Bipolar disord, crnt episode manic w/o psych features, mildYesF31.12Bipolar disord, crnt episode manic w/o psych features, modYesF31.13Bipolar disord, crnt epsd manic w/o psych features, severeYesF31.2Bipolar disord, crnt episode manic severe w psych featuresYesF31.3Bipolar disord, current episode depress, mild or mod severtF31.30Bipolar disord, crnt epsd depress, mild or mod severt, unspYesF31.31Bipolar disorder, current episode depressed, mildYesF31.32Bipolar disorder, current episode depressed, moderateYesF31.4Bipolar disord, crnt epsd depress, sev, w/o psych featuresYes
Frequently asked questions
What is ICD-10 code F31?
F31 is an ICD-10-CM diagnosis code for Bipolar disorder.
Is F31 a billable code?
No. F31 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is F31 in?
F31 falls under Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.
When did F31 become effective?
F31 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to F31?
F31 belongs to category F31, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.