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T54.1X3 vs T54.1X4

T54.1X3 (Toxic effect of other corrosive organic compounds, assault) compared with T54.1X4 (Toxic effect of other corrosive organic compounds, undetermined), from the official CMS tabular data. T54.1X3 and T54.1X4 code the same substance (Aromatics) with a different intent.

Relationship

Informational

Drug table relationship

T54.1X3
Toxic effect of other corrosive organic compounds, assault
↔
T54.1X4
Toxic effect of other corrosive organic compounds, undetermined

Same substance, different circumstance of exposure.

Same substance — undetermined intent (Aromatics)

Accidental poisoning, intentional self-harm, assault, undetermined intent, adverse effect and underdosing are mutually exclusive columns — exactly one applies to a given encounter.

Source: CMS Table of Drugs and Chemicals

Can these codes be reported together?

Same substance, different intent. T54.1X3 and T54.1X4 code the same substance (Aromatics) with a different circumstance of exposure.

From the CMS Table of Drugs and Chemicals: accidental poisoning, intentional self-harm, assault, undetermined intent, adverse effect and underdosing are mutually exclusive columns — only one of them applies to a given encounter.

Side by side

T54.1X3Toxic effect of other corrosive organic compounds, assaultT54.1X4Toxic effect of other corrosive organic compounds, undetermined
Billing statusNon-billable header

Report instead: T54.1X3A, T54.1X3D, T54.1X3S

Non-billable header

Report instead: T54.1X4A, T54.1X4D, T54.1X4S

ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionToxic effect of other corrosive organic compounds, assault is a non-billable ICD-10-CM category code (T54.1X3).Toxic effect of other corrosive organic compounds, undetermined is a non-billable ICD-10-CM category code (T54.1X4).
7th characterThe appropriate 7th character is to be added to each code from category T54The appropriate 7th character is to be added to each code from category T54
Use additional code
code(s):
for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
personal history of foreign body fully removed (Z87.821)
code(s):
for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
personal history of foreign body fully removed (Z87.821)
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources