Is W88.0 a billable ICD-10-CM code?

No. W88.0 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does W88.0 sit in the tabular list?

External causes of morbidity (V00-Y99), in the block Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99).

What cannot be coded together with W88.0?

W88.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above W88.0 (W88) and apply to it just the same.

W88.0

W88.0 — Exposure to X-rays

Non-billable headerICD-10-CM

W88.0 is a non-billable header ICD-10-CM code for exposure to x-rays. 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 inherited from the categories above W88.0

These are not written on W88.0, but they bind it: a note on a category applies to every code beneath it. Billing W88.0 with anything listed here is a denial.

Written on W88 — Exposure to ionizing radiation

exposure to sunlight (X32)

Risk adjustment

W88.0 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How W88.0 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to W88.0.

Overexposure›radioactivity
Radiation›electromagnetic, ionizing
Radiation›x-rays(hard) (soft)
Radiation›ionized, ionizing›x-rays

Code history

W88.0 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead W88.0

3 child codes. Green means billable.

Related codes at this level

Codes that share W88. If W88.0 is not quite right, the correct code is usually one of these.

Questions about W88.0

Is W88.0 a billable ICD-10-CM code?: No. W88.0 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does W88.0 sit in the tabular list?: External causes of morbidity (V00-Y99), in the block Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99).
What cannot be coded together with W88.0?: W88.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above W88.0 (W88) and apply to it just the same.