MCMedicalCodingSoftware
X00.0

X00.0: Exposure to flames in uncontrolled fire in building or structure

Non-billable headerICD-10-CM

X00.0 is a non-billable header ICD-10-CM code for exposure to flames in uncontrolled fire in building or structure. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The appropriate 7th character is to be added to each code from category X00

A
initial encounter
D
subsequent encounter
S
sequela

Excludes2 inherited from the categories above X00.0

Not part of this code, but both may be coded when both are present.

Written on X00: Exposure to uncontrolled fire in building or structure

  • Exposure to ignition or melting of nightwear (X05)
  • Exposure to ignition or melting of other clothing and apparel (X06.-)
  • Exposure to other specified smoke, fire and flames (X08.-)

Other codes that can never be billed with X00.0

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • W13.9Fall from, out of or through building, not otherwise specified
  • W13.9XXAFall from, out of or through building, not otherwise specified, initial encounter
  • W13.9XXDFall from, out of or through building, not otherwise specified, subsequent encounter
  • W13.9XXSFall from, out of or through building, not otherwise specified, sequela

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Exposure›fire, flames›uncontrolled›in building or structure

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead X00.0

3 child codes. Green means billable.

Other codes under X00

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.