Is W00 a billable ICD-10-CM code?

No. W00 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does W00 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?

W00 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

W00

W00 — Fall due to ice and snow

Non-billable headerICD-10-CM

W00 is a non-billable header ICD-10-CM code for 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 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

fall on (from) ice and snow involving pedestrian conveyance (V00.-)
fall from stairs and steps not due to ice and snow (W10.-)

Includes

Conditions this code covers.

pedestrian on foot falling (slipping) on ice and snow

Other codes that can never be billed with W00

These codes carry an Excludes1 note pointing at W00. 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 alone.

W10Fall on and from stairs and steps
V00Pedestrian conveyance accident
W01Fall on same level from slipping, tripping and stumbling
W03Other fall on same level due to collision with another person
W03.XXXAOther fall on same level due to collision with another person, initial encounter
W03.XXXDOther fall on same level due to collision with another person, subsequent encounter
W03.XXXSOther fall on same level due to collision with another person, sequela

Risk adjustment

W00 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.

Code to one of these instead W00

4 child codes. Green means billable.

Questions about W00

Is W00 a billable ICD-10-CM code?: No. W00 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does W00 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?: W00 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.