Y28.1 — Contact with knife, undetermined intent
Y28.1 is a non-billable header ICD-10-CM code for contact with knife, undetermined intent. 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 Y28
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
Y28.1 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 Y28.1 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 Y28.1.
- Undetermined intent›sharp object›knife
- Contact›with›knife›stated as undetermined whether accidental or intentional
Code to one of these instead Y28.1
3 child codes. Green means billable.
Related codes at this level
Codes that share Y28. If Y28.1 is not quite right, the correct code is usually one of these.
Questions about Y28.1
- Is Y28.1 a billable ICD-10-CM code?
- No. Y28.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Y28.1 sit in the tabular list?
- External causes of morbidity (V00-Y99), in the block Event of undetermined intent (Y21-Y33).