X18 is the authoritative medical code for Contact with other hot metals. This classification is used in medical billing and clinical recording to specify the clinical criteria for contact with other hot metals (ICD-10-CM X18), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Contact with other hot metals is a non-billable ICD-10-CM category code X18. A more specific billable subcode must be selected for claims submission. Inclusion terms: Contact with liquid metal. Excludes1 (not coded here): exposure to excessive natural heat X30; exposure to fire and flames X00-X08. 7th character: The appropriate 7th character is to be added to code X18.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for X18 in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Contact with liquid metal
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- exposure to excessive natural heat X30
- exposure to fire and flames X00-X08
Frequently Asked Questions (FAQ) & Clinical Guidance
Can X18 be billed directly?
No. X18 (Contact with other hot metals) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does X18 require a 7th character?
Yes. The appropriate 7th character is to be added to code X18.
What can't be coded together with X18?
Per Excludes1 instructions, X18 must not be reported with: exposure to excessive natural heat (X30); exposure to fire and flames (X00-X08).
What conditions are included under X18?
Contact with other hot metals includes: Contact with liquid metal.
Codes in This Family (6)
Official ICD-10-CM classifications in the same code family as X18, with their registry titles.
- X18.XXXA — Contact with other hot metals, initial encounter
- X18.XXXD — Contact with other hot metals, subsequent encounter
- X18.XXXS — Contact with other hot metals, sequela
- X18A — Contact with other hot metals, initial encounter
- X18D — Contact with other hot metals, subsequent encounter
- X18S — Contact with other hot metals, sequela
Indexed As (7)
Circumstance phrases from the official ICD-10-CM External Cause of Injuries Index that map to this code.
- Burn, burned, burning (accidental) (by) (from) (on), hot, metal NEC (molten) (liquid)
- Burn, burned, burning (accidental) (by) (from) (on), metal NEC (hot) (liquid) (molten)
- Burn, burned, burning (accidental) (by) (from) (on), substance NEC (hot), molten (metal)
- Contact (accidental), with, hot, metal NEC (molten) (liquid)
- Contact (accidental), with, metal, hot NEC (liquid) (molten)
- Contact (accidental), with, substance, hot NEC, molten (metal)
- Scald, scalding (accidental) (by) (from) (in), metal NEC (molten) (liquid) (hot)
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code X16
Contact with hot heating appliances, radiators and pipes