ICD-10-CM 2027 diagnosis code

S45.1Injury of brachial artery

Not billable — use a more specific codeRequires 7th character

S45.1 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 S45.1

S45.1 is the ICD-10-CM diagnosis code for injury of brachial artery. It belongs to category S45 (injury of blood vessels at shoulder and upper arm level), block S40-S49 (injuries to the shoulder and upper arm) 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 S45 (injury of blood vessels at shoulder and upper arm level), S45.1 is specifically for injury of brachial artery. Related codes cover axillary artery (S45.0), axillary or brachial vein (S45.2), superficial vein at shoulder and upper arm level (S45.3), other specified blood vessels at shoulder and upper arm level (S45.8) and unspecified blood vessel at shoulder and upper arm level (S45.9).

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 S45

Ainitial encounter
Dsubsequent encounter
Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to S45.1.

› From S45 Injury of blood vessels at shoulder and upper arm level

Excludes2

injury of subclavian artery (S25.1)
injury of subclavian vein (S25.3)

Code also

any associated open wound (S41.-)

Broader instructions also apply from S40-S49 Injuries to the shoulder and upper arm and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Codes whose notes reference S45.1

S55Excludes2

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 S45.1

Is S45.1 billable?: No. S45.1 is a header code. Report one of its more specific subcodes instead.