ICD-10-CM 2027 diagnosis code
S91Open wound of ankle, foot and toes
Not billable — use a more specific code
S91 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About S91
S91 is the ICD-10-CM diagnosis code for open wound of ankle, foot and toes. It belongs to block S90-S99 (injuries to the ankle and foot) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: S91.0 (ankle), S91.1 (nail), S91.2 (nail) and S91.3 (foot).
Don't report S91 together with the conditions in its Excludes1 note: open fracture of ankle, foot and toes (S92.-with 7th character B) and traumatic amputation of ankle and foot (S98.-).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under S91
- S91.0Open wound of ankle
- S91.1Open wound of toe without damage to nail
- S91.10Unspecified open wound of toe without damage to nail
- S91.101Unspecified open wound of right great toe without damage to nail
- S91.102Unspecified open wound of left great toe without damage to nail
- S91.103Unspecified open wound of unspecified great toe without damage to nail
- S91.104Unspecified open wound of right lesser toe(s) without damage to nail
- S91.105Unspecified open wound of left lesser toe(s) without damage to nail
- S91.106Unspecified open wound of unspecified lesser toe(s) without damage to nail
- S91.109Unspecified open wound of unspecified toe(s) without damage to nail
- S91.11Laceration without foreign body of toe without damage to nail
- S91.111Laceration without foreign body of right great toe without damage to nail
- S91.112Laceration without foreign body of left great toe without damage to nail
- S91.113Laceration without foreign body of unspecified great toe without damage to nail
- S91.114Laceration without foreign body of right lesser toe(s) without damage to nail
- S91.115Laceration without foreign body of left lesser toe(s) without damage to nail
- S91.116Laceration without foreign body of unspecified lesser toe(s) without damage to nail
- S91.119Laceration without foreign body of unspecified toe without damage to nail
- S91.12Laceration with foreign body of toe without damage to nail
- S91.121Laceration with foreign body of right great toe without damage to nail
- S91.122Laceration with foreign body of left great toe without damage to nail
- S91.123Laceration with foreign body of unspecified great toe without damage to nail
- S91.124Laceration with foreign body of right lesser toe(s) without damage to nail
- S91.125Laceration with foreign body of left lesser toe(s) without damage to nail
- S91.126Laceration with foreign body of unspecified lesser toe(s) without damage to nail
- S91.129Laceration with foreign body of unspecified toe(s) without damage to nail
- S91.13Puncture wound without foreign body of toe without damage to nail
- S91.131Puncture wound without foreign body of right great toe without damage to nail
- S91.132Puncture wound without foreign body of left great toe without damage to nail
- S91.133Puncture wound without foreign body of unspecified great toe without damage to nail
- S91.134Puncture wound without foreign body of right lesser toe(s) without damage to nail
- S91.135Puncture wound without foreign body of left lesser toe(s) without damage to nail
- S91.136Puncture wound without foreign body of unspecified lesser toe(s) without damage to nail
- S91.139Puncture wound without foreign body of unspecified toe(s) without damage to nail
- S91.14Puncture wound with foreign body of toe without damage to nail
- S91.141Puncture wound with foreign body of right great toe without damage to nail
- S91.142Puncture wound with foreign body of left great toe without damage to nail
- S91.143Puncture wound with foreign body of unspecified great toe without damage to nail
- S91.144Puncture wound with foreign body of right lesser toe(s) without damage to nail
- S91.145Puncture wound with foreign body of left lesser toe(s) without damage to nail
- S91.146Puncture wound with foreign body of unspecified lesser toe(s) without damage to nail
- S91.149Puncture wound with foreign body of unspecified toe(s) without damage to nail
- S91.15Open bite of toe without damage to nail
- S91.151Open bite of right great toe without damage to nail
- S91.152Open bite of left great toe without damage to nail
- S91.153Open bite of unspecified great toe without damage to nail
- S91.154Open bite of right lesser toe(s) without damage to nail
- S91.155Open bite of left lesser toe(s) without damage to nail
- S91.156Open bite of unspecified lesser toe(s) without damage to nail
- S91.159Open bite of unspecified toe(s) without damage to nail
- S91.10Unspecified open wound of toe without damage to nail
- S91.2Open wound of toe with damage to nail
- S91.20Unspecified open wound of toe with damage to nail
- S91.201Unspecified open wound of right great toe with damage to nail
- S91.202Unspecified open wound of left great toe with damage to nail
- S91.203Unspecified open wound of unspecified great toe with damage to nail
- S91.204Unspecified open wound of right lesser toe(s) with damage to nail
- S91.205Unspecified open wound of left lesser toe(s) with damage to nail
- S91.206Unspecified open wound of unspecified lesser toe(s) with damage to nail
- S91.209Unspecified open wound of unspecified toe(s) with damage to nail
- S91.21Laceration without foreign body of toe with damage to nail
- S91.211Laceration without foreign body of right great toe with damage to nail
- S91.212Laceration without foreign body of left great toe with damage to nail
- S91.213Laceration without foreign body of unspecified great toe with damage to nail
- S91.214Laceration without foreign body of right lesser toe(s) with damage to nail
- S91.215Laceration without foreign body of left lesser toe(s) with damage to nail
- S91.216Laceration without foreign body of unspecified lesser toe(s) with damage to nail
- S91.219Laceration without foreign body of unspecified toe(s) with damage to nail
- S91.22Laceration with foreign body of toe with damage to nail
- S91.221Laceration with foreign body of right great toe with damage to nail
- S91.222Laceration with foreign body of left great toe with damage to nail
- S91.223Laceration with foreign body of unspecified great toe with damage to nail
- S91.224Laceration with foreign body of right lesser toe(s) with damage to nail
- S91.225Laceration with foreign body of left lesser toe(s) with damage to nail
- S91.226Laceration with foreign body of unspecified lesser toe(s) with damage to nail
- S91.229Laceration with foreign body of unspecified toe(s) with damage to nail
- S91.23Puncture wound without foreign body of toe with damage to nail
- S91.231Puncture wound without foreign body of right great toe with damage to nail
- S91.232Puncture wound without foreign body of left great toe with damage to nail
- S91.233Puncture wound without foreign body of unspecified great toe with damage to nail
- S91.234Puncture wound without foreign body of right lesser toe(s) with damage to nail
- S91.235Puncture wound without foreign body of left lesser toe(s) with damage to nail
- S91.236Puncture wound without foreign body of unspecified lesser toe(s) with damage to nail
- S91.239Puncture wound without foreign body of unspecified toe(s) with damage to nail
- S91.24Puncture wound with foreign body of toe with damage to nail
- S91.241Puncture wound with foreign body of right great toe with damage to nail
- S91.242Puncture wound with foreign body of left great toe with damage to nail
- S91.243Puncture wound with foreign body of unspecified great toe with damage to nail
- S91.244Puncture wound with foreign body of right lesser toe(s) with damage to nail
- S91.245Puncture wound with foreign body of left lesser toe(s) with damage to nail
- S91.246Puncture wound with foreign body of unspecified lesser toe(s) with damage to nail
- S91.249Puncture wound with foreign body of unspecified toe(s) with damage to nail
- S91.25Open bite of toe with damage to nail
- S91.251Open bite of right great toe with damage to nail
- S91.252Open bite of left great toe with damage to nail
- S91.253Open bite of unspecified great toe with damage to nail
- S91.254Open bite of right lesser toe(s) with damage to nail
- S91.255Open bite of left lesser toe(s) with damage to nail
- S91.256Open bite of unspecified lesser toe(s) with damage to nail
- S91.259Open bite of unspecified toe(s) with damage to nail
- S91.20Unspecified open wound of toe with damage to nail
- S91.3Open wound of foot
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to S91.
Broader instructions also apply from S90-S99 Injuries to the ankle and foot and Chapter 19: Injury, poisoning and certain other consequences of external causes.
Codes whose notes reference S91
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about S91
Is S91 billable?
- No. S91 is a header code. Report one of its more specific subcodes instead.