X11 vs X12
X11 (Contact with hot tap-water) compared with X12 (Contact with other hot fluids), 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. X11 carries an Excludes1 note covering X12: “contact with water heated on stove (X12)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| X11Contact with hot tap-water | X12Contact with other hot fluids | |
|---|---|---|
| Billing status | Non-billable header Report instead: X11.0XXA, X11.0XXD, X11.0XXS, X11.1XXA, X11.1XXD | Non-billable header |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Contact with hot tap-water is a non-billable ICD-10-CM category code (X11). | Contact with other hot fluids is a non-billable ICD-10-CM category code (X12). |
| 7th character | The appropriate 7th character is to be added to each code from category X11 | The appropriate 7th character is to be added to code X12 |
| Includes | contact with boiling tap-water contact with boiling water NOS | Contact with water heated on stove |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources