F40.21 – Animal type phobia

ICD-10-CM 2027 diagnosis code · Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders

Non-billable header

ICD-10-CM code F40.21
Code
F40.21 (claims format: F4021)
Description
Animal type phobia
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block
F40-F48 Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders
Parent codes
F40 › F40.2

Billable codes under F40.21

F40.21 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

F40.2 – Specific (isolated) phobias

Excludes2 (not included here):

Related codes in F40.2

Frequently asked questions

What is ICD-10 code F40.21?

F40.21 is the ICD-10-CM code for animal type phobia, in the block F40-F48 (Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders).

Is F40.21 a billable code?

No. F40.21 is a header code with more specific child codes; report one of the billable codes listed above.

What category does F40.21 belong to?

It belongs to category F40 – Phobic anxiety disorders.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.