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ICD-10-CM 2027

ICD-10 code for asphyxia conflagration

T59.9

Toxic effect of unspecified gases, fumes and vapors

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Conflagration › asphyxia (by inhalation of gases, fumes or vapors)”. Page updated September 29, 2026.

About coding asphyxia conflagration

The ICD-10-CM code for asphyxia conflagration is T59.9 (Toxic effect of unspecified gases, fumes and vapors).

Within T59, choose T59.9 (unspecified gases, fumes and vapors) only when documentation doesn't support a more specific option: nitrogen oxides (T59.0), sulfur dioxide (T59.1), formaldehyde (T59.2), lacrimogenic gas (T59.3), chlorine gas (T59.4), fluorine gas and hydrogen fluoride (T59.5), hydrogen sulfide (T59.6), carbon dioxide (T59.7) and 1 more.

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Common questions about asphyxia conflagration ICD-10 codes

What is the ICD-10 code for asphyxia conflagration?

T59.9 — Toxic effect of unspecified gases, fumes and vapors (a header code; report a more specific subcode).

Is T59.9 billable?

No. T59.9 is a header code. Report one of its more specific subcodes instead.