Y00.XXXA — Assault by blunt object, initial encounter
Y00.XXXA is a billable, specific ICD-10-CM code for assault by blunt object, initial encounter. It is valid for submission on a claim.
7th character "A" — initial encounter
The appropriate 7th character is to be added to code Y00
- 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.
- assault by strike by sports equipment (Y08.0-)
Excludes1 inherited from the categories above Y00.XXXA
These are not written on Y00.XXXA, but they bind it: a note on a category applies to every code beneath it. Billing Y00.XXXA with anything listed here is a denial.
Risk adjustment
Y00.XXXA 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
Y00.XXXA 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 Y00. If Y00.XXXA is not quite right, the correct code is usually one of these.
Questions about Y00.XXXA
- Is Y00.XXXA a billable ICD-10-CM code?
- Yes. Y00.XXXA is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Y00.XXXA sit in the tabular list?
- External causes of morbidity (V00-Y99), in the block Assault (X92-Y09).
- What cannot be coded together with Y00.XXXA?
- Y00.XXXA 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 Y00.XXXA (Y00) and apply to it just the same.