ICD-10-CM 2027 diagnosis code
S91.255Open bite of left lesser toe(s) with damage to nail
S91.255 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.
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 S91.255
S91.255 is the ICD-10-CM diagnosis code for open bite of left lesser toe(s) with damage to nail. It belongs to category S91 (open wound of ankle, foot and toes), 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 3 subcodes must be used instead.
Within S91.25 (open bite of toe with damage to nail), S91.255 is specifically for open bite of left lesser toe(s) with damage to nail. Related codes cover right great toe with damage to nail (S91.251), left great toe with damage to nail (S91.252), unspecified great toe with damage to nail (S91.253), right lesser toe(s) with damage to nail (S91.254), unspecified lesser toe(s) with damage to nail (S91.256) and unspecified toe(s) with damage to nail (S91.259).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
7th character
The appropriate 7th character is to be added to each code from category S91
Notes that apply from higher levels
Instructions written at a parent level also apply to S91.255.
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.
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 S91.255
Is S91.255 billable?
- No. S91.255 is a header code. Report one of its more specific subcodes instead.