Oth fx right patella, subs for opn fx type I/2 w nonunion

This code signifies a nonunion of an open fracture of the right patella, specifically an open fracture type I or II, that is being treated in a subsequent encounter. Nonunion indicates that the fracture has failed to heal completely after a prolonged period.

Apply this code when documenting ongoing treatment for a right patellar fracture that was initially open (Type I or II) and has progressed to a nonunion. This is appropriate for follow-up visits, surgical interventions for nonunion, or other management of the unhealed fracture.

• Always use a 7th character for fracture codes; 'M' indicates subsequent encounter for open fracture type I or II with nonunion.
• Ensure documentation clearly specifies "nonunion" and the open fracture type (I or II) for the right patella.
• Do not use this code for initial encounters or for malunion, which has a different 7th character.