X00.4XXS
Hit by object from burning building or structure in uncontrolled fire, sequela
X00.4XXS (also written X004XXS) is a billable ICD-10-CM diagnosis code for hit by object from burning building or structure in uncontrolled fire, sequela. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 21 codes in category X00 (Exposure to uncontrolled fire in building or structure). Its 7th character, S, means sequela. Its coding notes include a Code first instruction, 1 Excludes1 entry and 6 Excludes2 entries.
7th character
Category X00 requires a 7th character. X00.4 has only 4 characters, so a placeholder X fills the empty positions.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
An external cause code is never a principal or first-listed diagnosis. Its 7th character is assigned for each encounter and should match the injury or condition code.
Code first
If the underlying condition listed here is present and known, sequence it first.
- any associated cataclysm
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Includes
Further defines or gives examples of the content of the category.
- conflagration in building or structure
Notes
Also from chapter/block level (1 note)
- This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.