ICD-10-CM 2027 diagnosis code

X18Contact with other hot metals

Not billable — use a more specific code

X18 is a header code, so it can't be reported by itself. Choose one of the 3 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 X18

X18 is the ICD-10-CM diagnosis code for contact with other hot metals. It belongs to block X10-X19 (contact with heat and hot substances) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: X18.XXXA (initial encounter), X18.XXXD (subsequent encounter) and X18.XXXS (sequela).

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 X18

Coding notes

Applicable toConditions and synonyms classified to this code

Contact with liquid metal

Notes that apply from higher levels

Instructions written at a parent level also apply to X18.

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

Alphabetic index entries

7 entries

Terms in the official ICD-10-CM index that lead to X18.

Codes whose notes reference X18

X12Excludes1

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 X18

Is X18 billable?: No. X18 is a header code. Report one of its more specific subcodes instead.