F40.240 Claustrophobia
ICD-10-CM · CMS code reference
F40.240 is claustrophobia, one of the situational type phobias. Acrophobia (F40.241), fear of bridges (F40.242) and fear of flying (F40.243) have their own codes; other situational phobias go to F40.248.
Coding notes
From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Excludes2
Not part of this code, but both can be coded when both are documented.
- dysmorphophobia (nondelusional) (F45.22)
- nosophobia (F45.22)
Related codes
F40.230Fear of blood ICD-10-CMF40.231Fear of injections and transfusions ICD-10-CMF40.232Fear of other medical care ICD-10-CMF40.233Fear of injury ICD-10-CMF40.241Acrophobia ICD-10-CMF40.242Fear of bridges ICD-10-CMF40.243Fear of flying ICD-10-CMF40.248Other situational type phobia ICD-10-CM
Common questions
Is F40.240 a billable code?
Yes. F40.240 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.