F40.228 – Other natural environment type phobia

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

Billable code

ICD-10-CM code F40.228

Code: F40.228 (claims format: F40228)
Description: Other natural environment type phobia
Billable: Yes – valid for HIPAA-covered transactions
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 › F40.22

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)

Index terms for F40.228

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in F40.22

F40.220 – Fear of thunderstormsBillable

Frequently asked questions

What is ICD-10 code F40.228?

F40.228 is the ICD-10-CM code for other natural environment type phobia, in the block F40-F48 (Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders).

Is F40.228 a billable code?

Yes. F40.228 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does F40.228 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.