F31 – Bipolar disorder

ICD-10-CM 2027 diagnosis code · Mood [affective] disorders

Non-billable header

ICD-10-CM code F31

Code: F31 (claims format: F31)
Description: Bipolar disorder
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block: F30-F39 Mood [affective] disorders

Billable codes under F31

F31 is a header code and cannot be used on claims. Choose the most specific code:

F31.0 – Bipolar disorder, current episode hypomanicBillable
F31.1 – Bipolar disorder, current episode manic without psychotic featuresHeader (more codes below)
F31.2 – Bipolar disorder, current episode manic severe with psychotic featuresBillable
F31.3 – Bipolar disorder, current episode depressed, mild or moderate severityHeader (more codes below)
F31.4 – Bipolar disorder, current episode depressed, severe, without psychotic featuresBillable
F31.5 – Bipolar disorder, current episode depressed, severe, with psychotic featuresBillable
F31.6 – Bipolar disorder, current episode mixedHeader (more codes below)
F31.7 – Bipolar disorder, currently in remissionHeader (more codes below)
F31.8 – Other bipolar disordersHeader (more codes below)
F31.9 – Bipolar disorder, unspecifiedBillable

Notes for F31

Includes:

bipolar I disorder
bipolar type I disorder
manic-depressive illness
manic-depressive psychosis
manic-depressive reaction
seasonal bipolar disorder

Excludes1 (not coded here):

bipolar disorder, single manic episode (F30.-)
major depressive disorder, single episode (F32.-)
major depressive disorder, recurrent (F33.-)

Excludes2 (not included here):

cyclothymia (F34.0)

Frequently asked questions

What is ICD-10 code F31?

F31 is the ICD-10-CM code for bipolar disorder, in the block F30-F39 (Mood [affective] disorders).

Is F31 a billable code?

No. F31 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.