Skip to content
Dx

ICD-10-CM 2027 diagnosis code

F31.3Bipolar disorder, current episode depressed, mild or moderate severity

Not billable — use a more specific code

F31.3 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.Short description: Bipolar disord, current episode depress, mild or mod severt

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About F31.3

F31.3 is the ICD-10-CM diagnosis code for bipolar disorder, current episode depressed, mild or moderate severity. It belongs to category F31 (bipolar disorder), block F30-F39 (mood [affective] disorders) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within F31 (bipolar disorder), F31.3 is specifically for bipolar disorder, current episode depressed, mild or moderate severity. Related codes cover current episode hypomanic (F31.0), current episode manic without psychotic features (F31.1), current episode manic severe with psychotic features (F31.2), current episode depressed, severe, without psychotic features (F31.4), current episode depressed, severe, with psychotic features (F31.5), current episode mixed (F31.6), currently in remission (F31.7), other bipolar disorders (F31.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: F31.30 (unspecified), F31.31 (mild) and F31.32 (moderate).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under F31.3

Notes that apply from higher levels

Instructions written at a parent level also apply to F31.3.

› From F31 Bipolar disorder
Includes
  • bipolar I disorder
  • bipolar type I disorder
  • manic-depressive illness
  • manic-depressive psychosis
  • manic-depressive reaction
  • seasonal bipolar disorder
Excludes1
  • bipolar disorder, single manic episode (F30.-)
  • major depressive disorder, single episode (F32.-)
  • major depressive disorder, recurrent (F33.-)
Excludes2

Broader instructions also apply from Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about F31.3

Is F31.3 billable?

No. F31.3 is a header code. Report one of its more specific subcodes instead.