T51 vs Z77.013
T51 (Toxic effect of alcohol) compared with Z77.013 (Contact with and (suspected) exposure to gadolinium), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. T51 carries an Excludes1 note covering Z77.013: “contact with and (suspected) exposure to toxic substances (Z77.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Yes, when both are documented. Z77.013 carries an Excludes2 note covering T51: “toxic effects of substances chiefly nonmedicinal as to source (T51-T65)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| T51Toxic effect of alcohol | Z77.013Contact with and (suspected) exposure to gadolinium | |
|---|---|---|
| Billing status | Non-billable header Report instead: T51.0X1A, T51.0X1D, T51.0X1S, T51.0X2A, T51.0X2D | Billable |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Toxic effect of alcohol is a non-billable ICD-10-CM category code (T51). | — |
| 7th character | The appropriate 7th character is to be added to each code from category T51 | — |
| Includes | — | contact with and (suspected) exposures to potential hazards to health |
| 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) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources