X00.1 is the authoritative medical code for Exposure to smoke in uncontrolled fire in building or structure. This classification is used in medical billing and clinical recording to specify the clinical criteria for exposure to smoke in uncontrolled fire in building or structure (ICD-10-CM X00.1), 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
Exposure to smoke in uncontrolled fire in building or structure is a non-billable ICD-10-CM category code X00.1. A more specific billable subcode must be selected for claims submission. Includes: conflagration in building or structure. Excludes1 (not coded here): arson X97. Excludes2 (not included here): 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.-; explosions W35-W40; lightning T75.0-; transport accident V01-V99. Code first: any associated cataclysm. 7th character: The appropriate 7th character is to be added to each code from category X00.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for X00.1 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- conflagration in building or structure
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- 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.-
- explosions W35-W40
- lightning T75.0-
- transport accident V01-V99
Code First
Underlying conditions that must be sequenced before this code.
Frequently Asked Questions (FAQ) & Clinical Guidance
Can X00.1 be billed directly?
No. X00.1 (Exposure to smoke in uncontrolled fire in building or structure) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does X00.1 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category X00.
What can't be coded together with X00.1?
Per official ICD-10-CM Excludes1 instructions, X00.1 must not be reported together with: arson (X97).
Can X00.1 be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, X00.1 and the following are not considered part of each other and may both be reported when both conditions are present: 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.-); explosions (W35-W40).
Does X00.1 need to be sequenced after another code?
Yes. Code first: any associated cataclysm.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to X00.1 in its code family, with their registry titles.
- X00 — Exposure to uncontrolled fire in building or structure
- X00-X08 — Exposure to smoke, fire and flames (X00-X08)
- X00.0 — Exposure to flames in uncontrolled fire in building or structure
- X00.0XXA — Exposure to flames in uncontrolled fire in building or structure, initial encounter
- X00.0XXD — Exposure to flames in uncontrolled fire in building or structure, subsequent encounter
- X00.0XXS — Exposure to flames in uncontrolled fire in building or structure, sequela
- X00.1XXA — Exposure to smoke in uncontrolled fire in building or structure, initial encounter
- X00.1XXD — Exposure to smoke in uncontrolled fire in building or structure, subsequent encounter
- X00.1XXS — Exposure to smoke in uncontrolled fire in building or structure, sequela
- X00.2 — Injury due to collapse of burning building or structure in uncontrolled fire
View all 29 codes in the X00 family
Indexed As (1)
Circumstance phrases from the official ICD-10-CM External Cause of Injuries Index that map to this code.
- Exposure (to), fire, flames (accidental), uncontrolled, in building or structure, with, smoke inhalation