Nondisp fx of coronoid pro of l ulna, 7thN

This code signifies a previously diagnosed fracture of the coronoid process in the left ulna that was initially nondisplaced. The current encounter addresses a complication where the fracture has failed to heal (nonunion) and is now classified as an open fracture of type IIIA, IIIB, or IIIC. This indicates significant soft tissue damage and potential contamination.

Apply this code when documenting follow-up care for a patient with a known nondisplaced left ulnar coronoid process fracture that has progressed to a nonunion and is presenting as a severe open fracture. This would be used for subsequent encounters after the initial treatment of the fracture.

• Ensure documentation clearly specifies "nonunion" and the open fracture type (IIIA, IIIB, or IIIC).
• Verify laterality (left ulna) is explicitly stated in the medical record.
• This code is for a subsequent encounter, not the initial treatment of the fracture.