F31
ICD-10Non-billable categoryBipolar disorder
Official ICD-10-CM descriptor (FY2026)
Bipolar disorder
F31 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Includes
- bipolar I disorder
- bipolar type I disorder
- manic-depressive illness
- manic-depressive psychosis
- manic-depressive reaction
- seasonal bipolar disorder
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- bipolar disorder, single manic episode (F30.-)
- major depressive disorder, single episode (F32.-)
- major depressive disorder, recurrent (F33.-)
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- cyclothymia (F34.0)
More specific codes under F31
- F31.0Bipolar disorder, current episode hypomanic
- F31.1Bipolar disorder, current episode manic w/o psych featurescategory
- F31.2Bipolar disord, crnt episode manic severe w psych features
- F31.3Bipolar disord, current episode depress, mild or mod severtcategory
- F31.4Bipolar disord, crnt epsd depress, sev, w/o psych features
- F31.5Bipolar disord, crnt epsd depress, severe, w psych features
- F31.6Bipolar disorder, current episode mixedcategory
- F31.7Bipolar disorder, currently in remissioncategory
- F31.8Other bipolar disorderscategory
- F31.9Bipolar disorder, unspecified
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.