S44.3Injury of axillary nerve

S44.3 is the ICD-10-CM diagnosis code for injury of axillary nerve. It belongs to category S44 (injury of nerves 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 S44 (injury of nerves at shoulder and upper arm level), S44.3 is specifically for injury of axillary nerve. Related codes cover ulnar nerve at upper arm level (S44.0), median nerve at upper arm level (S44.1), radial nerve at upper arm level (S44.2), musculocutaneous nerve (S44.4), cutaneous sensory nerve at shoulder and upper arm level (S44.5), other nerves at shoulder and upper arm level (S44.8) and unspecified nerve at shoulder and upper arm level (S44.9).

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.