ICD-10-CM 2027
ICD-10 code for Brontophobia
From the official ICD-10-CM alphabetic index entry “Brontophobia”. Page updated September 29, 2026.
About coding Brontophobia
The ICD-10-CM code for Brontophobia is F40.220 (Fear of thunderstorms).
Within F40.22 (natural environment type phobia), F40.220 is specifically for fear of thunderstorms. Related codes cover other natural environment type phobia (F40.228).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 882 (Neuroses Except Depressive, relative weight 0.9952), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Brontophobia ICD-10 codes
What is the ICD-10 code for Brontophobia?
- F40.220 — Fear of thunderstorms.
Is F40.220 billable?
- Yes. F40.220 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F40.220 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F40.220 as a principal diagnosis.
Is F40.220 a CC or MCC?
- No. F40.220 is neither a CC nor an MCC under MS-DRG v44.0.