T59.9

Toxic effect of unspecified gases, fumes and vapors

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027

SourceCMS ICD-10-CM order file

ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODE	DESCRIPTION	TYPE
T59.91	Toxic effect of unspecified gases, fumes and vapors, accidental (unintentional)	Category
T59.91XA	Toxic effect of unspecified gases, fumes and vapors, accidental (unintentional), initial encounter	Billable
T59.91XD	Toxic effect of unspecified gases, fumes and vapors, accidental (unintentional), subsequent encounter	Billable
T59.91XS	Toxic effect of unspecified gases, fumes and vapors, accidental (unintentional), sequela	Billable
T59.92	Toxic effect of unspecified gases, fumes and vapors, intentional self-harm	Category
T59.92XA	Toxic effect of unspecified gases, fumes and vapors, intentional self-harm, initial encounter	Billable
T59.92XD	Toxic effect of unspecified gases, fumes and vapors, intentional self-harm, subsequent encounter	Billable
T59.92XS	Toxic effect of unspecified gases, fumes and vapors, intentional self-harm, sequela	Billable
T59.93	Toxic effect of unspecified gases, fumes and vapors, assault	Category
T59.93XA	Toxic effect of unspecified gases, fumes and vapors, assault, initial encounter	Billable
T59.93XD	Toxic effect of unspecified gases, fumes and vapors, assault, subsequent encounter	Billable
T59.93XS	Toxic effect of unspecified gases, fumes and vapors, assault, sequela	Billable
T59.94	Toxic effect of unspecified gases, fumes and vapors, undetermined	Category
T59.94XA	Toxic effect of unspecified gases, fumes and vapors, undetermined, initial encounter	Billable
T59.94XD	Toxic effect of unspecified gases, fumes and vapors, undetermined, subsequent encounter	Billable
T59.94XS	Toxic effect of unspecified gases, fumes and vapors, undetermined, sequela	Billable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.