S52.271C Monteggia's fracture of right ulna, initial encounter for open fracture type IIIA, IIIB, or IIIC

S52.271C is a billable/specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Monteggia's fracture of right ulna, initial encounter for open fracture type IIIA, IIIB, or IIIC.