W88
W88: Exposure to ionizing radiation
Non-billable headerICD-10-CM
W88 is a non-billable header ICD-10-CM code for exposure to ionizing radiation. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category W88
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- exposure to sunlight (X32)
Other codes that can never be billed with W88
Their own Excludes1 notes name this code, so the conflict is not listed above.
- X39.0Exposure to natural radiation
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead W88
3 child codes. Green means billable.