Is W01 a billable ICD-10-CM code?

No. W01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does W01 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 W01?

W01 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

W01

W01 — Fall on same level from slipping, tripping and stumbling

Non-billable headerICD-10-CM

W01 is a non-billable header ICD-10-CM code for fall on same level from slipping, tripping and stumbling. 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 W01

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 due to bumping (striking) against object (W18.0-)
fall in shower or bathtub (W18.2-)
fall on same level NOS (W18.30)
fall on same level from slipping, tripping and stumbling due to ice or snow (W00.0)
fall off or from toilet (W18.1-)
slipping, tripping and stumbling NOS (W18.40)
slipping, tripping and stumbling without falling (W18.4-)

Includes

Conditions this code covers.

fall on moving sidewalk

Other codes that can never be billed with W01

These codes carry an Excludes1 note pointing at W01. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading W01 alone.

W18.0Fall due to bumping against object
W25Contact with sharp glass
W25.XXXAContact with sharp glass, initial encounter
W25.XXXDContact with sharp glass, subsequent encounter
W25.XXXSContact with sharp glass, sequela

Risk adjustment

W01 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 W01

2 child codes. Green means billable.

Questions about W01

Is W01 a billable ICD-10-CM code?: No. W01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does W01 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 W01?: W01 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.