W89.9XXS — Exposure to unspecified man-made visible and ultraviolet light, sequela
Is W89.9XXS billable?
Yes, but W89.9XXS is an unspecified code. W89.9XXS is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, W89.9XXS is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting W89.9XXS — the more specific alternatives are listed below.
W89.9XXS at a glance
| Code | W89.9XXS |
|---|---|
| Description | Exposure to unspecified man-made visible and ultraviolet light, sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in W89.9XXS?
In W89.9XXS, the 7th character S means sequela. The 7th character is required for W89.9XXS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
How is W89.9XXS listed in the External Cause Index?
The External Cause of Injuries Index lists these routes under W89.9, the nearest indexed parent of W89.9XXS. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.
- Radiation › light sources (exposure to)
- Radiation › man-made visible light (exposure to)
- Radiation › ultraviolet (exposure to)
Excludes1 — never code together — inherited from W85-W99
The conditions below can never be reported together with W89.9XXS on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from W89
The conditions below are not part of W89.9XXS, but a patient may have both at the same time. When documentation supports it, W89.9XXS and the excluded code may both be reported.
- exposure to sunlight (X32)
How long has W89.9XXS existed?
W89.9XXS has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.