ICD-10-CM 2027 diagnosis code
X01Exposure to uncontrolled fire, not in building or structure
X01 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About X01
X01 is the ICD-10-CM diagnosis code for exposure to uncontrolled fire, not in building or structure. It belongs to block X00-X08 (exposure to smoke, fire and flames) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: X01.0 (structure), X01.1 (structure), X01.3 (structure), X01.4 (structure) and X01.8 (structure).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under X01
- X01.0Exposure to flames in uncontrolled fire, not in building or structure
- X01.1Exposure to smoke in uncontrolled fire, not in building or structure
- X01.3Fall due to uncontrolled fire, not in building or structure
- X01.4Hit by object due to uncontrolled fire, not in building or structure
- X01.8Other exposure to uncontrolled fire, not in building or structure
Coding notes
- exposure to forest fire
Notes that apply from higher levels
Instructions written at a parent level also apply to X01.
Broader instructions also apply from X00-X08 Exposure to smoke, fire and flames and Chapter 20: External causes of morbidity.
Codes whose notes reference X01
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about X01
Is X01 billable?
- No. X01 is a header code. Report one of its more specific subcodes instead.