2027 ICD-10-CM Diagnosis Code X18Contact with other hot metals

ICD-10-CM Codes›V01–Y99›X10-X19›X18

ICD-10-CM X18
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

X18 is a non-billable ICD-10-CM category code for contact with other hot metals, so it cannot be submitted on claims. Use a more specific code from this category instead, such as X18.XXXA, X18.XXXD, and X18.XXXS.

Code Identity

ICD-10-CM Code
X18
Billable Status
No — Non-Billable Category
Code Describes
Contact with other hot metals
Short Description
Contact with other hot metals
Same as the full description in the CMS dataset.
Chapter
X10-X19
Contact with heat and hot substances

Code Classification

ChapterV01–Y99External causes of morbidity and mortality
SectionX10-X19Contact with heat and hot substances
CategoryX18Contact with other hot metals
This CodeX18Contact with other hot metals

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to X18: its own notes plus those printed at block X10-X19 and Chapter 20. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Contact with liquid metal

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block X10-X19 Contact with heat and hot substances applies to 60 codes
  • exposure to excessive natural heat (X30)
  • exposure to fire and flames (X00-X08)

Notes

General instructions on how these codes are used.

From Chapter 20 (V00-Y99) External causes of morbidity and mortality applies to 7,461 codes
  • This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

  • The appropriate 7th character is to be added to code X18
Values for category X18 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name X18, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming X18: they are not reported together with it, unless the two conditions are unrelated.

  • X12 Contact with other hot fluids
    hot (liquid) metals (X18)

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index; each main term links to its index entry.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About X18Overview

What is the ICD-10 code for contact with other hot metals?

X18 is the ICD-10-CM category for contact with other hot metals, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is X18 (Contact with other hot metals) a billable code?

No. This is a category header that groups the codes for contact with other hot metals, and headers cannot be submitted on claims. Claims for contact with other hot metals need a more specific code from this category, such as X18.XXXA, X18.XXXD, and X18.XXXS.

Can X18 be reported with X30?

Not as a rule. The Excludes1 note at block X10-X19, which applies to X18, lists "exposure to excessive natural heat (X30)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).