W00.9 — Unspecified fall due to ice and snow
W00.9 is a non-billable header ICD-10-CM code for unspecified fall due to ice and snow. 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 W00
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1 inherited from the categories above W00.9
These are not written on W00.9, but they bind it: a note on a category applies to every code beneath it. Billing W00.9 with anything listed here is a denial.
Other codes that can never be billed with W00.9
These codes carry an Excludes1 note pointing at W00.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading W00.9 alone.
- V00Pedestrian conveyance accident
Risk adjustment
W00.9 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 W00.9 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 W00.9.
- Fall, falling›due to›ice or snow
Code history
W00.9 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 W00.9
3 child codes. Green means billable.
Related codes at this level
Codes that share W00. If W00.9 is not quite right, the correct code is usually one of these.
Questions about W00.9
- Is W00.9 a billable ICD-10-CM code?
- No. W00.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does W00.9 sit in the tabular list?
- External causes of morbidity (V00-Y99), in the block Slipping, tripping, stumbling and falls (W00-W19).
- What cannot be coded together with W00.9?
- W00.9 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 W00.9 (W00) and apply to it just the same.