F40.22 – Natural environment 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 F40.22

Code: F40.22 (claims format: F4022)
Description: Natural environment 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 F40.22

F40.22 is a header code and cannot be used on claims. Choose the most specific code:

F40.220 – Fear of thunderstormsBillable
F40.228 – Other natural environment type phobiaBillable

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):

dysmorphophobia (nondelusional) (F45.22)
nosophobia (F45.22)

Related codes in F40.2

F40.21 – Animal type phobiaHeader
F40.23 – Blood, injection, injury type phobiaHeader
F40.24 – Situational type phobiaHeader
F40.29 – Other specified phobiaHeader

Frequently asked questions

What is ICD-10 code F40.22?

F40.22 is the ICD-10-CM code for natural environment type phobia, in the block F40-F48 (Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders).

Is F40.22 a billable code?

No. F40.22 is a header code with more specific child codes; report one of the billable codes listed above.

What category does F40.22 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.