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F31.8

Non-billable

Other bipolar disorders

F31.8 is the ICD-10-CM code for Other bipolar disorders. It is a non-billable category code — use a more specific child code such as F31.81 for billing.

Status
Header (non-billable)
Chapter
F01-F99
Parent
F31
Subcodes
2
Edition
FY2026

F01-F99 Mental, Behavioral and Neurodevelopmental disorders

What this means — in plain language

MedlinePlus · NIH

What is bipolar disorder? Bipolar disorder is a mood disorder that can cause intense mood swings: Sometimes you may feel extremely "up," elated, irritable, or energized. This is called a manic episode . Other times you may feel "down," sad, indifferent, or hopeless. This is called a depressive episode . You may have both manic and depressive symptoms together. This is called a mixed episode . Along with mood swings,…

Read more about Bipolar Disorder at MedlinePlus ↗
Bipolar disorder ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code F31.8?
F31.8 is the ICD-10-CM code for "Other bipolar disorders". It falls under F01-F99 Mental, Behavioral and Neurodevelopmental disorders.
Is F31.8 a billable code?
No — F31.8 is a non-billable header code. Use a more specific child code (such as F31.81) for billing.
What are the subcodes of F31.8?
F31.8 has 2 more specific child codes, including F31.81, F31.89.

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

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