2026 ICD-10-CM Diagnosis Code X01Exposure to uncontrolled fire, not in building or structure

ICD-10-CM Codes›V01–Y99›X00-X08›X01

ICD-10-CM X01
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

X01 is a non-billable ICD-10-CM category code for exposure to uncontrolled fire, not in building or structure, so it cannot be submitted on claims. Use a more specific code from this category instead, such as X01.0XXA, X01.0XXD, X01.0XXS, and X01.1XXA.

Code Identity

ICD-10-CM Code
X01
Billable Status
No — Non-Billable Category
Code Describes
Exposure to uncontrolled fire, not in building or structure
Chapter
X00-X08
Exposure to smoke, fire and flames

Code Classification

ChapterV01–Y99External causes of morbidity and mortality
SectionX00-X08Exposure to smoke, fire and flames
CategoryX01Exposure to uncontrolled fire, not in building or structure
This CodeX01Exposure to uncontrolled fire, not in building or structure

Specific Coding for Exposure to uncontrolled fire, not in building or structureOverview

Non-specific codes like X01 require more characters. Use one of these billable codes instead:

  • X01.0 for Exposure to flames in uncontrolled fire, not in building or structure

  • X01.1 for Exposure to smoke in uncontrolled fire, not in building or structure

  • X01.3 for Fall due to uncontrolled fire, not in building or structure

  • X01.4 for Hit by object due to uncontrolled fire, not in building or structure

  • X01.8 for Other exposure to uncontrolled fire, not in building or structure

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • exposure to forest fire

7th Character Note

  • The appropriate 7th character is to be added to each code from category X01

7th Character

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About X01Overview

Is X01 (Exposure to uncontrolled fire, not in building or structure) a billable code?

No. This is a category header that groups the codes for exposure to uncontrolled fire, not in building or structure, and headers cannot be submitted on claims. Claims for exposure to uncontrolled fire, not in building or structure need a more specific code from this category, such as X01.0XXA, X01.0XXD, and X01.0XXS.