S42.31Greenstick fracture of shaft of humerus

S42.31 is the ICD-10-CM diagnosis code for Greenstick fracture of shaft of humerus. It belongs to category S42 (fracture of shoulder and upper arm), 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 S42.3 (fracture of shaft of humerus), S42.31 is specifically for Greenstick fracture of shaft of humerus. Related codes cover unspecified fracture of shaft of humerus (S42.30), transverse fracture of shaft of humerus (S42.32), oblique fracture of shaft of humerus (S42.33), spiral fracture of shaft of humerus (S42.34), comminuted fracture of shaft of humerus (S42.35), segmental fracture of shaft of humerus (S42.36) and other fracture of shaft of humerus (S42.39).

Codes in this range require a 7th character: A for initial encounter for closed fracture, D for subsequent encounter for fracture with routine healing, G for subsequent encounter for fracture with delayed healing, K for subsequent encounter for fracture with nonunion, P for subsequent encounter for fracture with malunion 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.