T56.0X1 (Toxic effect of lead and its compounds, accidental (unintentional)) compared with T56.0X3 (Toxic effect of lead and its compounds, assault), from the official CMS tabular data. T56.0X1 and T56.0X3 code the same substance (Antiknock) with a different intent.
Same substance, different circumstance of exposure.
Same substance — assault (Antiknock)
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
Same substance, different intent. T56.0X1 and T56.0X3 code the same substance (Antiknock) 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.
| T56.0X1Toxic effect of lead and its compounds, accidental (unintentional) | T56.0X3Toxic effect of lead and its compounds, assault | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | S00-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) |
| Definition | Toxic effect of lead and its compounds, accidental (unintentional) is a non-billable ICD-10-CM category code (T56.0X1). | Toxic effect of lead and its compounds, assault is a non-billable ICD-10-CM category code (T56.0X3). |
| 7th character | The appropriate 7th character is to be added to each code from category T56 | The 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 lead 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) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources