S52.009C Unspecified fracture of upper end of unspecified ulna, initial encounter for open fracture type IIIA, IIIB, or IIIC

S52.009C is a billable/specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Unspecified fracture of upper end of unspecified ulna, initial encounter for open fracture type IIIA, IIIB, or IIIC.