Nondisp fx of unsp tibial tuberosity, 7thN

This code describes a situation where a patient has a fracture of the tibial tuberosity that was initially nondisplaced, but is now being treated for complications related to a severe open fracture (Gustilo-Anderson Type IIIA, IIIB, or IIIC) that has failed to heal properly (nonunion). This indicates a complex healing challenge following a significant injury.

Use this code for follow-up encounters where a patient with a previously diagnosed nondisplaced tibial tuberosity fracture is presenting with an established nonunion, and the original fracture was complicated by a high-grade open injury. This code is appropriate when the nonunion is the primary focus of the current treatment or evaluation.

• Ensure documentation clearly specifies "nondisplaced" for the initial fracture and "nonunion" for the current healing status.
• Verify the original open fracture was classified as Gustilo-Anderson Type IIIA, IIIB, or IIIC.
• This "N" seventh character indicates a subsequent encounter for nonunion, not the initial treatment of the fracture.