W86 vs X39
W86 (Exposure to other specified electric current) compared with X39 (Exposure to other forces of nature), 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. W86 carries an Excludes1 note covering X39: “natural radiation NOS (X39)”
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
| W86Exposure to other specified electric current | X39Exposure to other forces of nature | |
|---|---|---|
| Billing status | Non-billable header Report instead: W86.0XXA, W86.0XXD, W86.0XXS, W86.1XXA, W86.1XXD | Non-billable header Report instead: X39.01XA, X39.01XD, X39.01XS, X39.08XA, X39.08XD |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Exposure to other specified electric current is a non-billable ICD-10-CM category code (W86). | Exposure to other forces of nature is a non-billable ICD-10-CM category code (X39). |
| 7th character | The appropriate 7th character is to be added to each code from category W86 | The appropriate 7th character is to be added to each code from category X39 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources