W90 vs Y63.5
W90 (Exposure to other nonionizing radiation) compared with Y63.5 (Inappropriate temperature in local application and packing), 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. W90 carries an Excludes1 note covering Y63.5: “failure in dosage of radiation or temperature during surgical and medical care (Y63.2-Y63.5)”
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
| W90Exposure to other nonionizing radiation | Y63.5Inappropriate temperature in local application and packing | |
|---|---|---|
| Billing status | Non-billable header Report instead: W90.0XXA, W90.0XXD, W90.0XXS, W90.1XXA, W90.1XXD | Billable |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Exposure to other nonionizing radiation is a non-billable ICD-10-CM category code (W90). | Inappropriate temperature in local application and packing is a billable ICD-10-CM diagnosis code (Y63.5). |
| 7th character | The appropriate 7th character is to be added to each code from category W90 | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources