ICD-10-CM 2027 diagnosis code
X00.8XXSOther exposure to uncontrolled fire in building or structure, sequela
X00.8XXS is a valid, billable ICD-10-CM code for other exposure to uncontrolled fire in building or structure, sequela. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Oth exposure to uncontrolled fire in bldg, sequela
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 X00.8XXS
X00.8XXS is the ICD-10-CM diagnosis code for other exposure to uncontrolled fire in building or structure, sequela. It belongs to category X00 (exposure to uncontrolled fire in building or structure), block X00-X08 (exposure to smoke, fire and flames) and chapter 20 (external causes of morbidity). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
The 7th character "S" means sequela: use it for complications or conditions that arise as a direct result of the original condition.
Code first: any associated cataclysm.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as E929.4 (late effects of accident caused by fire).
7th character
Ssequela
Other encounter types for X00.8:
Notes that apply from higher levels
Instructions written at a parent level also apply to X00.8XXS.
Broader instructions also apply from X00-X08 Exposure to smoke, fire and flames and Chapter 20: External causes of morbidity.
ICD-9-CM equivalent
Converter →- E929.4Late effects of accident caused by fireapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
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 X00.8XXS
Is X00.8XXS billable?
- Yes. X00.8XXS is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
What does the "S" at the end of X00.8XXS mean?
- It is the 7th character for sequela. Per the official guidelines, use it for complications or conditions that arise as a direct result of the original condition.
Can X00.8XXS be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict X00.8XXS as a principal diagnosis.
Is X00.8XXS a CC or MCC?
- No. X00.8XXS is neither a CC nor an MCC under MS-DRG v44.0.
What is the ICD-9 code for X00.8XXS?
- The CMS General Equivalence Mappings map X00.8XXS to ICD-9-CM E929.4.