S91.1 — Open wound of toe without damage to nail
S91.1 is a non-billable header ICD-10-CM code for open wound of toe without damage to nail. 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 S91
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Other codes that can never be billed with S91.1
These codes carry an Excludes1 note pointing at S91.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading S91.1 alone.
- S90.47Other superficial bite of toe
Risk adjustment
S91.1 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.
Code to one of these instead S91.1
6 child codes. Green means billable.
- S91.10Unspecified open wound of toe without damage to nail
- S91.11Laceration without foreign body of toe without damage to nail
- S91.12Laceration with foreign body of toe without damage to nail
- S91.13Puncture wound without foreign body of toe without damage to nail
- S91.14Puncture wound with foreign body of toe without damage to nail
- S91.15Open bite of toe without damage to nail
Related codes at this level
Codes that share S91. If S91.1 is not quite right, the correct code is usually one of these.
Questions about S91.1
- Is S91.1 a billable ICD-10-CM code?
- No. S91.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does S91.1 sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the ankle and foot (S90-S99).