F31.3Header code — not billable

Bipolar disorder, current episode depressed, mild or moderate severity

Short description: Bipolar disord, current episode depress, mild or mod severt

Chapter
5. Mental, Behavioral and Neurodevelopmental disorders
Category
F31
Effective date
October 1, 2026

Related codes in category F31

Frequently asked questions

What is ICD-10 code F31.3?

F31.3 is an ICD-10-CM diagnosis code for Bipolar disorder, current episode depressed, mild or moderate severity.

Is F31.3 a billable code?

No. F31.3 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is F31.3 in?

F31.3 falls under Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

When did F31.3 become effective?

F31.3 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to F31.3?

F31.3 belongs to category F31, which includes 12 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.