T52.2X3 (Toxic effect of homologues of benzene, assault) compared with T52.2X4 (Toxic effect of homologues of benzene, undetermined), from the official CMS tabular data. T52.2X3 and T52.2X4 code the same substance (Butyltoluene) with a different intent.
Same substance, different circumstance of exposure.
Same substance — undetermined intent (Butyltoluene)
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. T52.2X3 and T52.2X4 code the same substance (Butyltoluene) 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.
| T52.2X3Toxic effect of homologues of benzene, assault | T52.2X4Toxic effect of homologues of benzene, 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 homologues of benzene, assault is a non-billable ICD-10-CM category code (T52.2X3). | Toxic effect of homologues of benzene, undetermined is a non-billable ICD-10-CM category code (T52.2X4). |
| 7th character | The appropriate 7th character is to be added to each code from category T52 | The appropriate 7th character is to be added to each code from category T52 |
| 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