F31.31Billable
Bipolar disorder, current episode depressed, mild
- Chapter
- 5. Mental, Behavioral and Neurodevelopmental disorders
- Category
- F31
- Effective date
- October 1, 2026
Related codes in category F31
F31Bipolar disorderF31.0Bipolar 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, unspYesF31.32Bipolar disorder, current episode depressed, moderateYesF31.4Bipolar disord, crnt epsd depress, sev, w/o psych featuresYes
Frequently asked questions
What is ICD-10 code F31.31?
F31.31 is an ICD-10-CM diagnosis code for Bipolar disorder, current episode depressed, mild.
Is F31.31 a billable code?
Yes. F31.31 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is F31.31 in?
F31.31 falls under Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.
When did F31.31 become effective?
F31.31 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to F31.31?
F31.31 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.