S52.0Fracture of upper end of ulna

S52.0 is the ICD-10-CM diagnosis code for fracture of upper end of ulna. It belongs to category S52 (fracture of forearm), 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 6 subcodes must be used instead.

Within S52 (fracture of forearm), S52.0 is specifically for fracture of upper end of ulna. Related codes cover fracture of upper end of radius (S52.1), fracture of shaft of ulna (S52.2), fracture of shaft of radius (S52.3), fracture of lower end of radius (S52.5), fracture of lower end of ulna (S52.6) and unspecified fracture of forearm (S52.9).

Codes in this range require a 7th character: A for initial encounter for closed fracture, B for initial encounter for open fracture type I or II, C for initial encounter for open fracture type IIIA, IIIB, or IIIC, D for subsequent encounter for closed fracture with routine healing, E for subsequent encounter for open fracture type I or II with routine healing, F for subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing and 10 more. Use placeholder "X" characters to fill any empty positions before the 7th character.

The conditions in its Excludes2 note aren't part of S52.0, but may be coded alongside it if the patient has both: fracture of elbow NOS (S42.40-) and fractures of shaft of ulna (S52.2-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.