ICD-10-CM 2027 diagnosis code
F40.2Specific (isolated) phobias
F40.2 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.
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 F40.2
F40.2 is the ICD-10-CM diagnosis code for specific (isolated) phobias. It belongs to category F40 (phobic anxiety disorders), block F40-F48 (anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental 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 5 subcodes must be used instead.
Within F40 (phobic anxiety disorders), F40.2 is specifically for specific (isolated) phobias. Related codes cover agoraphobia (F40.0), social phobias (F40.1), other phobic anxiety disorders (F40.8) and phobic anxiety disorder, unspecified (F40.9).
To report this condition, pick the subcode that matches the documentation: F40.21 (phobia), F40.22 (phobia), F40.23 (phobia), F40.24 (phobia) and F40.29 (phobia).
The conditions in its Excludes2 note aren't part of F40.2, but may be coded alongside it if the patient has both: dysmorphophobia (nondelusional) (F45.22) and nosophobia (F45.22).
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 F40.2
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to F40.2.
Broader instructions also apply from Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about F40.2
Is F40.2 billable?
- No. F40.2 is a header code. Report one of its more specific subcodes instead.