W31 vs W86
W31 (Contact with other and unspecified machinery) compared with W86 (Exposure to other specified electric current), 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. W31 carries an Excludes1 note covering W86: “exposure to electric current (W86)”
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
| W31Contact with other and unspecified machinery | W86Exposure to other specified electric current | |
|---|---|---|
| Billing status | Non-billable header Report instead: W31.0XXA, W31.0XXD, W31.0XXS, W31.1XXA, W31.1XXD | Non-billable header Report instead: W86.0XXA, W86.0XXD, W86.0XXS, W86.1XXA, W86.1XXD |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Contact with other and unspecified machinery is a non-billable ICD-10-CM category code (W31). | Exposure to other specified electric current is a non-billable ICD-10-CM category code (W86). |
| 7th character | The appropriate 7th character is to be added to each code from category W31 | The appropriate 7th character is to be added to each code from category W86 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources