ICDwise
X00 ⚠ Non-billable

Exposure to uncontrolled fire in building or structure

ICD-10-CM · FY2026 · External Causes of Morbidity

Code
X00
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
External Causes of Morbidity
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Official coding notes

From CMS's ICD-10-CM Tabular List.

Includes
  • conflagration in building or structure
Excludes2 — not included here, but may code together
  • Exposure to ignition or melting of nightwear (X05)
  • Exposure to ignition or melting of other clothing and apparel (X06.-)
  • Exposure to other specified smoke, fire and flames (X08.-)
Code first
  • any associated cataclysm
7th character
  • The appropriate 7th character is to be added to each code from category X00

Frequently asked questions

What is ICD-10 code X00?
ICD-10-CM code X00 represents Exposure to uncontrolled fire in building or structure. It is a non-billable header code requiring a more specific subcategory in the External Causes of Morbidity chapter, effective October 1, 2025 – September 30, 2026.
Is X00 billable?
No. X00 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is X00 in?
X00 belongs to the External Causes of Morbidity chapter (V00–Y99) of ICD-10-CM.

Related codes in the X00 category

X00.0 Exposure to flames in uncontrolled fire in building or structure Non-billable X00.1 Exposure to smoke in uncontrolled fire in building or structure Non-billable X00.2 Injury due to collapse of burning building or structure in uncontrolled fire Non-billable X00.3 Fall from burning building or structure in uncontrolled fire Non-billable X00.4 Hit by object from burning building or structure in uncontrolled fire Non-billable X00.5 Jump from burning building or structure in uncontrolled fire Non-billable X00.8 Other exposure to uncontrolled fire in building or structure Non-billable X00.0XXA Exposure to flames in uncontrolled fire in building or structure, initial encounter Billable

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