F31
⚠ Non-billable
Bipolar disorder
ICD-10-CM · FY2026 · Mental, Behavioral and Neurodevelopmental Disorders
Code
F31
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Mental, Behavioral and Neurodevelopmental Disorders
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Includes
- bipolar I disorder
- bipolar type I disorder
- manic-depressive illness
- manic-depressive psychosis
- manic-depressive reaction
- seasonal bipolar disorder
Excludes1 — never code together
- bipolar disorder, single manic episode (F30.-)
- major depressive disorder, single episode (F32.-)
- major depressive disorder, recurrent (F33.-)
Excludes2 — not included here, but may code together
- cyclothymia (F34.0)
Frequently asked questions
What is ICD-10 code F31?
ICD-10-CM code F31 represents Bipolar disorder. It is a non-billable header code requiring a more specific subcategory in the Mental, Behavioral and Neurodevelopmental Disorders chapter, effective October 1, 2025 – September 30, 2026.
Is F31 billable?
No. F31 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is F31 in?
F31 belongs to the Mental, Behavioral and Neurodevelopmental Disorders chapter (F01–F99) of ICD-10-CM.
Related codes in the F31 category
F31.0
Bipolar disorder, current episode hypomanic
Billable
F31.1
Bipolar disorder, current episode manic without psychotic features
Non-billable
F31.2
Bipolar disorder, current episode manic severe with psychotic features
Billable
F31.3
Bipolar disorder, current episode depressed, mild or moderate severity
Non-billable
F31.4
Bipolar disorder, current episode depressed, severe, without psychotic features
Billable
F31.5
Bipolar disorder, current episode depressed, severe, with psychotic features
Billable
F31.6
Bipolar disorder, current episode mixed
Non-billable
F31.7
Bipolar disorder, currently in remission
Non-billable
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