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F31

Non-billable

Bipolar disorder

F31 is the ICD-10-CM code for Bipolar disorder. It is a non-billable category code — use a more specific child code such as F31.0 for billing.

Status
Header (non-billable)
Chapter
F01-F99
Subcodes
10
Edition
FY2026

F01-F99 Mental, Behavioral and Neurodevelopmental disorders

A disorder characterized by two or more episodes in which the patient's mood and activity levels are significantly disturbed, this disturbance consisting on some occasions of an elevation of mood and increased energy and activity (hypomania or mania) and on others of a lowering of mood and decreased energy and activity (depression). Repeated episodes of hypomania or mania only are classified as bipolar.

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

Frequently asked questions

What is ICD-10 code F31?
F31 is the ICD-10-CM code for "Bipolar disorder". It falls under F01-F99 Mental, Behavioral and Neurodevelopmental disorders.
Is F31 a billable code?
No — F31 is a non-billable header code. Use a more specific child code (such as F31.0) for billing.
What are the subcodes of F31?
F31 has 10 more specific child codes, including F31.0, F31.1, F31.2.
What is excluded from F31?
Excludes1 (not coded here): bipolar disorder, single manic episode (F30.-); major depressive disorder, single episode (F32.-); major depressive disorder, recurrent (F33.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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