X00

Header — not billable

Exposure to uncontrolled fire in building or structure

The ICD-10 code for exposure to uncontrolled fire in building or structure is X00.

X00 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 7 more specific codes below.

Clinical notes

Code first

This code represents a manifestation of an underlying disease. Coding convention requires the underlying (etiology) code to be sequenced first, with this code listed second.

any associated cataclysm

Excludes2 (not included here)

An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.

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.-)

Includes

Terms listed here further define or give examples of the conditions grouped under this code — they describe what the code covers, not a separate diagnosis.

conflagration in building or structure

7th character definitions

These definitions specify what each valid 7th-character value means for codes in this category.

[object Object]

7th character note

This category requires a 7th character to indicate additional clinical detail (e.g. encounter type: initial, subsequent, sequela). The code is incomplete without it.

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

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
•This code represents a manifestation. Documentation should identify the underlying condition, which must be coded first.
•This category requires a 7th character. Documentation should clearly indicate the episode of care (initial encounter, subsequent encounter, or sequela).
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

X00