Is W94 a billable ICD-10-CM code?

No. W94 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does W94 sit in the tabular list?

External causes of morbidity (V00-Y99), in the block Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99).

W94

W94 — Exposure to high and low air pressure and changes in air pressure

Non-billable headerICD-10-CM

W94 is a non-billable header ICD-10-CM code for exposure to high and low air pressure and changes in air pressure. 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 W94

A: initial encounter
D: subsequent encounter
S: sequela

Other codes that can never be billed with W94

These codes carry an Excludes1 note pointing at W94. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading W94 alone.

V97.8Other air transport accidents, not elsewhere classified
W16Fall, jump or diving into water

Risk adjustment

W94 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 W94

4 child codes. Green means billable.

Questions about W94

Is W94 a billable ICD-10-CM code?: No. W94 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does W94 sit in the tabular list?: External causes of morbidity (V00-Y99), in the block Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99).