T51.1X1 vs T51.1X4
T51.1X1 (Toxic effect of methanol, accidental (unintentional)) compared with T51.1X4 (Toxic effect of methanol, undetermined), from the official CMS tabular data. T51.1X1 and T51.1X4 code the same substance (Canned) with a different intent.
Can these codes be reported together?
Same substance, different intent. T51.1X1 and T51.1X4 code the same substance (Canned) 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
| T51.1X1Toxic effect of methanol, accidental (unintentional) | T51.1X4Toxic effect of methanol, 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 methanol, accidental (unintentional) is a non-billable ICD-10-CM category code (T51.1X1). | Toxic effect of methanol, undetermined is a non-billable ICD-10-CM category code (T51.1X4). |
| 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 |
| Includes | Toxic effect of methanol 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