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T54.2X2 vs T54.2X4

T54.2X2 (Toxic effect of corrosive acids and acid-like substances, intentional self-harm) compared with T54.2X4 (Toxic effect of corrosive acids and acid-like substances, undetermined), from the official CMS tabular data. T54.2X2 and T54.2X4 code the same substance (AcidNEC) with a different intent.

Relationship

Informational

Drug table relationship

T54.2X2
Toxic effect of corrosive acids and acid-like substances, intentional self-harm
↔
T54.2X4
Toxic effect of corrosive acids and acid-like substances, undetermined

Same substance, different circumstance of exposure.

Same substance — undetermined intent (AcidNEC)

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. T54.2X2 and T54.2X4 code the same substance (AcidNEC) 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

T54.2X2Toxic effect of corrosive acids and acid-like substances, intentional self-harmT54.2X4Toxic effect of corrosive acids and acid-like substances, undetermined
Billing statusNon-billable headerNon-billable header
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 corrosive acids and acid-like substances, intentional self-harm is a non-billable ICD-10-CM category code (T54.2X2).Toxic effect of corrosive acids and acid-like substances, undetermined is a non-billable ICD-10-CM category code (T54.2X4).
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