X01 – Exposure to uncontrolled fire, not in building or structure
ICD-10-CM 2027 diagnosis code · Exposure to smoke, fire and flames
- Code
X01(claims format:X01)- Description
- Exposure to uncontrolled fire, not in building or structure
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 20. External causes of morbidity (V00-Y99)
- Block
- X00-X08 Exposure to smoke, fire and flames
Billable codes under X01
X01 is a header code and cannot be used on claims. Choose the most specific code:
- X01.0 – Exposure to flames in uncontrolled fire, not in building or structureHeader (more codes below)
- X01.1 – Exposure to smoke in uncontrolled fire, not in building or structureHeader (more codes below)
- X01.3 – Fall due to uncontrolled fire, not in building or structureHeader (more codes below)
- X01.4 – Hit by object due to uncontrolled fire, not in building or structureHeader (more codes below)
- X01.8 – Other exposure to uncontrolled fire, not in building or structureHeader (more codes below)
7th character values
Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).
| Character | Meaning |
|---|---|
A | initial encounter |
D | subsequent encounter |
S | sequela |
Notes for X01
- exposure to forest fire
- The appropriate 7th character is to be added to each code from category X01
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block X00-X08
- arson (X97)
Frequently asked questions
What is ICD-10 code X01?
X01 is the ICD-10-CM code for exposure to uncontrolled fire, not in building or structure, in the block X00-X08 (Exposure to smoke, fire and flames).
Is X01 a billable code?
No. X01 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.