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ICD-10-CM tabular list

X10-X19Contact with heat and hot substances

ICD-10-CM codes X10-X19 cover contact with heat and hot substances, within external causes of morbidity. The block holds 85 codes across 10 categories, of which 60 are billable and 25 are header codes that cannot be submitted on a claim. 85 of them (100%) require a 7th character.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • exposure to excessive natural heat (X30)
  • exposure to fire and flames (X00-X08)

The 7th character in X10-X19

A code in this block is not complete without its 7th character, and a missing one is a rejected claim rather than a denied one: the clearinghouse never passes it on. 85 of the 85 codes here take one.

A
initial encounter
D
subsequent encounter
S
sequela

Categories in X10-X19

ICD-10-CMFY2026-Apr· effective April 1, 2026