MCMCB Pro
X37

X37Cataclysmic storm

Non-billable headerICD-10-CM

X37 is a non-billable header ICD-10-CM code for cataclysmic storm. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The appropriate 7th character is to be added to each code from category X37

A
initial encounter
D
subsequent encounter
S
sequela

Other codes that can never be billed with X37

These codes carry an Excludes1 note pointing at X37. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading X37 alone.

Risk adjustment

X37 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead X37

7 child codes. Green means billable.

Questions about X37

Is X37 a billable ICD-10-CM code?
No. X37 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does X37 sit in the tabular list?
External causes of morbidity (V00-Y99), in the block Exposure to forces of nature (X30-X39).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.