X18 – Contact with other hot metals

ICD-10-CM 2027 diagnosis code · Contact with heat and hot substances

Non-billable header

ICD-10-CM code X18
Code
X18 (claims format: X18)
Description
Contact with other hot metals
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
20. External causes of morbidity (V00-Y99)
Block
X10-X19 Contact with heat and hot substances

Billable codes under X18

X18 is a header code and cannot be used on claims. Choose the most specific code:

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

CharacterMeaning
Ainitial encounter
Dsubsequent encounter
Ssequela

Notes for X18

Applicable to:
  • Contact with liquid metal
7th character note:
  • The appropriate 7th character is to be added to code X18

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block X10-X19

Excludes1 (not coded here):
  • exposure to excessive natural heat (X30)
  • exposure to fire and flames (X00-X08)

Frequently asked questions

What is ICD-10 code X18?

X18 is the ICD-10-CM code for contact with other hot metals, in the block X10-X19 (Contact with heat and hot substances).

Is X18 a billable code?

No. X18 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.