X37.9 – Unspecified cataclysmic storm

ICD-10-CM 2027 diagnosis code · Exposure to forces of nature

Non-billable header

ICD-10-CM code X37.9

Code: X37.9 (claims format: X379)
Description: Unspecified cataclysmic storm
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 20. External causes of morbidity (V00-Y99)
Block: X30-X39 Exposure to forces of nature
Parent codes: X37

Billable codes under X37.9

X37.9 is a header code and cannot be used on claims. Choose the most specific code:

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes for X37.9

Applicable to:

Storm NOS

Excludes1 (not coded here):

collapse of dam or man-made structure causing earth movement (X36.0)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

X37 – Cataclysmic storm

7th character note:

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

Related codes in X37

Frequently asked questions

What is ICD-10 code X37.9?

X37.9 is the ICD-10-CM code for unspecified cataclysmic storm, in the block X30-X39 (Exposure to forces of nature).

Is X37.9 a billable code?

No. X37.9 is a header code with more specific child codes; report one of the billable codes listed above.

What category does X37.9 belong to?

It belongs to category X37 – Cataclysmic storm.

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.