MCMedicalCodingSoftware
X00

X00: Exposure to uncontrolled fire in building or structure

Non-billable headerICD-10-CM

X00 is a non-billable header ICD-10-CM code for exposure to 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: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

  • 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.-)

Code first

The underlying condition must be sequenced before this code.

  • any associated cataclysm

Includes

Conditions this code covers.

  • conflagration in building or structure

Other codes that can never be billed with X00

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
  • W20.1Struck by object due to collapse of building
  • W20.1XXAStruck by object due to collapse of building, initial encounter
  • W20.1XXDStruck by object due to collapse of building, subsequent encounter
  • W20.1XXSStruck by object due to collapse of building, sequela

Risk adjustment

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

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead X00

7 child codes. Green means billable.

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.