Is W28.XXXS a billable ICD-10-CM code?

Yes. W28.XXXS is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does W28.XXXS sit in the tabular list?

External causes of morbidity (V00-Y99), in the block Exposure to inanimate mechanical forces (W20-W49).

What cannot be coded together with W28.XXXS?

W28.XXXS carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above W28.XXXS (W28) and apply to it just the same.

W28.XXXS

W28.XXXS — Contact with powered lawn mower, sequela

Billable / specific codeICD-10-CMPOA exempt

W28.XXXS is a billable, specific ICD-10-CM code for contact with powered lawn mower, sequela. It is valid for submission on a claim.

7th character "S" — sequela

The appropriate 7th character is to be added to code W28

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.

contact with nonpowered lawn mower (W27.1)

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.

exposure to electric current (W86.-)

Inclusion terms

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

Powered lawn mower (commercial) (residential)

Excludes1 inherited from the categories above W28.XXXS

These are not written on W28.XXXS, but they bind it: a note on a category applies to every code beneath it. Billing W28.XXXS with anything listed here is a denial.

Written on W28 — Contact with powered lawn mower

contact with nonpowered lawn mower (W27.1)

Excludes2 inherited from the categories above W28.XXXS

Also inherited, and the opposite of Excludes1: these conditions are not part of W28.XXXS, but a patient can have both, so you may code both.

Written on W28 — Contact with powered lawn mower

exposure to electric current (W86.-)

Risk adjustment

W28.XXXS 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 history

W28.XXXS has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share W28. If W28.XXXS is not quite right, the correct code is usually one of these.

Questions about W28.XXXS

Is W28.XXXS a billable ICD-10-CM code?: Yes. W28.XXXS is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does W28.XXXS sit in the tabular list?: External causes of morbidity (V00-Y99), in the block Exposure to inanimate mechanical forces (W20-W49).
What cannot be coded together with W28.XXXS?: W28.XXXS carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above W28.XXXS (W28) and apply to it just the same.