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ICD-10-CM 2027 diagnosis code

X18.XXXAContact with other hot metals, initial encounter

✓ Billable / specificRequires 7th character

X18.XXXA is a valid, billable ICD-10-CM code for contact with other hot metals, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 X18.XXXA

X18.XXXA is the ICD-10-CM diagnosis code for contact with other hot metals, initial encounter. It belongs to category X18 (contact with other hot metals), block X10-X19 (contact with heat and hot substances) 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 E924.0 (accident caused by hot liquids and vapors, including steam).

7th character

Ainitial encounter

Other encounter types for X18:

Notes that apply from higher levels

Instructions written at a parent level also apply to X18.XXXA.

Broader instructions also apply from X10-X19 Contact with heat and hot substances and Chapter 20: External causes of morbidity.

ICD-9-CM equivalent

Converter →
  • E924.0Accident caused by hot liquids and vapors, including steamapproximate

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 X18.XXXA

Is X18.XXXA billable?

Yes. X18.XXXA 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 X18.XXXA 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 X18.XXXA be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict X18.XXXA as a principal diagnosis.

Is X18.XXXA a CC or MCC?

No. X18.XXXA is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for X18.XXXA?

The CMS General Equivalence Mappings map X18.XXXA to ICD-9-CM E924.0.