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ICD-10-CM 2027 diagnosis code

X02.1XXAExposure to smoke in controlled fire in building or structure, initial encounter

✓ Billable / specificRequires 7th character

X02.1XXA is a valid, billable ICD-10-CM code for exposure to smoke in controlled fire in building or structure, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Exposure to smoke in controlled fire in bldg, init

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 X02.1XXA

X02.1XXA is the ICD-10-CM diagnosis code for exposure to smoke in controlled fire in building or structure, initial encounter. It belongs to category X02 (exposure to controlled 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 "A" means initial encounter: use it while the patient is receiving active treatment for the condition.

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 E890.2 (other smoke and fumes from conflagration in private dwelling).

7th character

Ainitial encounter

Other encounter types for X02.1:

Notes that apply from higher levels

Instructions written at a parent level also apply to X02.1XXA.

› From X02 Exposure to controlled fire in building or structure
Includes
  • exposure to fire in fireplace
  • exposure to fire in stove

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 →
  • E890.2Other smoke and fumes from conflagration in private dwellingapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about X02.1XXA

Is X02.1XXA billable?

Yes. X02.1XXA is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "A" at the end of X02.1XXA mean?

It is the 7th character for initial encounter. Per the official guidelines, use it while the patient is receiving active treatment for the condition.

Can X02.1XXA be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict X02.1XXA as a principal diagnosis.

Is X02.1XXA a CC or MCC?

No. X02.1XXA is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for X02.1XXA?

The CMS General Equivalence Mappings map X02.1XXA to ICD-9-CM E890.2.