Is W18.31 a billable ICD-10-CM code?

No. W18.31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does W18.31 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 W18.31?

W18.31 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

W18.31

W18.31 — Fall on same level due to stepping on an object

Non-billable headerICD-10-CM

W18.31 is a non-billable header ICD-10-CM code for fall on same level due to stepping on an object. 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 W18

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.

slipping, tripping and stumbling without fall due to stepping on animal (W18.41)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Fall on same level due to stepping on an animal

Other codes that can never be billed with W18.31

These codes carry an Excludes1 note pointing at W18.31. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading W18.31 alone.

W18.41Slipping, tripping and stumbling without falling due to stepping on object
W18.41XASlipping, tripping and stumbling without falling due to stepping on object, initial encounter
W18.41XDSlipping, tripping and stumbling without falling due to stepping on object, subsequent encounter
W18.41XSSlipping, tripping and stumbling without falling due to stepping on object, sequela

Risk adjustment

W18.31 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 W18.31 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 W18.31.

Stepping on›object›with fall
Fall, falling›on same level›due to›stepping on an object

Code to one of these instead W18.31

3 child codes. Green means billable.

Related codes at this level

Codes that share W18.3. If W18.31 is not quite right, the correct code is usually one of these.

Questions about W18.31

Is W18.31 a billable ICD-10-CM code?: No. W18.31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does W18.31 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 W18.31?: W18.31 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.