ICD-10-CM 2027 diagnosis code
S55.012Laceration of ulnar artery at forearm level, left arm
S55.012 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 S55.012
S55.012 is the ICD-10-CM diagnosis code for laceration of ulnar artery at forearm level, left arm. It belongs to category S55 (injury of blood vessels at forearm level), block S50-S59 (injuries to the elbow and forearm) 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 S55.01 (laceration of ulnar artery at forearm level), S55.012 is specifically for laceration of ulnar artery at forearm level, left arm. Related codes cover right arm (S55.011) and unspecified arm (S55.019).
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 S55
Notes that apply from higher levels
Instructions written at a parent level also apply to S55.012.
Broader instructions also apply from S50-S59 Injuries to the elbow and forearm 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 S55.012
Is S55.012 billable?
- No. S55.012 is a header code. Report one of its more specific subcodes instead.