Oth fx upr end unsp ulna, 7thN

This code signifies a nonunion of an open fracture involving the upper portion of the ulna, where the initial injury was classified as a severe open fracture (Type IIIA, IIIB, or IIIC). "Nonunion" indicates that the bone has failed to heal completely after a significant period. This is a subsequent encounter, meaning the patient is receiving ongoing care for this unhealed fracture.

Apply this code for patients presenting for follow-up care, surgical intervention, or management of an unhealed, severely open fracture of the proximal ulna. This is appropriate when documentation explicitly states nonunion and the initial injury was an open fracture type IIIA, IIIB, or IIIC.

• Always confirm the fracture's specific location (upper end of ulna) and the presence of nonunion.
• Verify that the original fracture was documented as an open fracture type IIIA, IIIB, or IIIC.
• Ensure this is a subsequent encounter for ongoing treatment, not the initial injury or routine follow-up for a healed fracture.