T57.1X1 (Toxic effect of phosphorus and its compounds, accidental (unintentional)) compared with T57.1X3 (Toxic effect of phosphorus and its compounds, assault), from the official CMS tabular data. T57.1X1 and T57.1X3 code the same substance (Phosphine) with a different intent.
Same substance, different circumstance of exposure.
Same substance — assault (Phosphine)
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. T57.1X1 and T57.1X3 code the same substance (Phosphine) 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.
| T57.1X1Toxic effect of phosphorus and its compounds, accidental (unintentional) | T57.1X3Toxic effect of phosphorus 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 phosphorus and its compounds, accidental (unintentional) is a non-billable ICD-10-CM category code (T57.1X1). | Toxic effect of phosphorus and its compounds, assault is a non-billable ICD-10-CM category code (T57.1X3). |
| 7th character | The appropriate 7th character is to be added to each code from category T57 | The appropriate 7th character is to be added to each code from category T57 |
| Includes | Toxic effect of phosphorus and its compounds NOS | — |
| 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) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources