S45.20Unspecified injury of axillary or brachial vein

S45.20 is the ICD-10-CM diagnosis code for unspecified injury of axillary or brachial vein. 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 S45.2, choose S45.20 (Unspecified injury of axillary or brachial vein) only when documentation doesn't support a more specific option: laceration of axillary or brachial vein (S45.21) and other specified injury of axillary or brachial vein (S45.29).

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.