T51.8X3 (Toxic effect of other alcohols, assault) compared with T51.8X4 (Toxic effect of other alcohols, undetermined), from the official CMS tabular data. T51.8X3 and T51.8X4 code the same substance (Bay) with a different intent.
Same substance, different circumstance of exposure.
Same substance — undetermined intent (Bay)
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. T51.8X3 and T51.8X4 code the same substance (Bay) 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.
| T51.8X3Toxic effect of other alcohols, assault | T51.8X4Toxic effect of other alcohols, undetermined | |
|---|---|---|
| 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 other alcohols, assault is a non-billable ICD-10-CM category code (T51.8X3). | Toxic effect of other alcohols, undetermined is a non-billable ICD-10-CM category code (T51.8X4). |
| 7th character | The appropriate 7th character is to be added to each code from category T51 | The appropriate 7th character is to be added to each code from category T51 |
| 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