Is W16 a billable ICD-10-CM code?

No. W16 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does W16 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 W16?

W16 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

W16

W16 — Fall, jump or diving into water

Non-billable headerICD-10-CM

W16 is a non-billable header ICD-10-CM code for fall, jump or diving into water. 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 W16

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.

accidental non-watercraft drowning and submersion not involving fall (W65-W74)
effects of air pressure from diving (W94.-)
fall into water from watercraft (V90-V94)
hitting an object or against bottom when falling from watercraft (V94.0)

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

striking or hitting diving board (W21.4)

Other codes that can never be billed with W16

These codes carry an Excludes1 note pointing at W16. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading W16 alone.

W17.3Fall into empty swimming pool
V90Drowning and submersion due to accident to watercraft
V92Drowning and submersion due to accident on board watercraft, without accident to watercraft
W17.3XXAFall into empty swimming pool, initial encounter
W17.3XXDFall into empty swimming pool, subsequent encounter
W17.3XXSFall into empty swimming pool, sequela
W18.2Fall in (into) shower or empty bathtub
W18.2XXAFall in (into) shower or empty bathtub, initial encounter

Risk adjustment

W16 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 W16

10 child codes. Green means billable.

Questions about W16

Is W16 a billable ICD-10-CM code?: No. W16 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does W16 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 W16?: W16 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.