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T56.6X1 vs T56.6X2

T56.6X1 (Toxic effect of tin and its compounds, accidental (unintentional)) compared with T56.6X2 (Toxic effect of tin and its compounds, intentional self-harm), from the official CMS tabular data. T56.6X1 and T56.6X2 code the same substance (TinNEC) with a different intent.

Relationship

Informational

Drug table relationship

T56.6X1
Toxic effect of tin and its compounds, accidental (unintentional)
↔
T56.6X2
Toxic effect of tin and its compounds, intentional self-harm

Same substance, different circumstance of exposure.

Same substance — intentional self-harm (TinNEC)

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. T56.6X1 and T56.6X2 code the same substance (TinNEC) 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

T56.6X1Toxic effect of tin and its compounds, accidental (unintentional)T56.6X2Toxic effect of tin and its compounds, intentional self-harm
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 tin and its compounds, accidental (unintentional) is a non-billable ICD-10-CM category code (T56.6X1).Toxic effect of tin and its compounds, intentional self-harm is a non-billable ICD-10-CM category code (T56.6X2).
7th characterThe appropriate 7th character is to be added to each code from category T56The appropriate 7th character is to be added to each code from category T56
Includes
toxic effects of fumes and vapors of metals
toxic effects of metals from all sources, except medicinal substances
Toxic effects of tin and its compounds NOS
toxic effects of fumes and vapors of metals
toxic effects of metals from all sources, except medicinal substances
Use additional code
code to identify any retained metal foreign body, if applicable (Z18.0-, T18.1-)
code(s):
for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
code to identify any retained metal foreign body, if applicable (Z18.0-, T18.1-)
code(s):
for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
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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