Oth fx unsp patella, subs for opn fx type I/2 w malunion

This code signifies a previously sustained open fracture of the kneecap, of an unspecified type, that is now healing incorrectly (malunion). The open nature of the initial injury indicates a break in the skin exposing the bone, and the current encounter is for ongoing management of this complication.

Apply this code when documenting a patient presenting for follow-up care, surgical intervention, or rehabilitation related to an unhealed patellar fracture that has united in a deformed position. This is specifically for open fractures classified as Type I or II, where the exact type of fracture (e.g., transverse, comminuted) was not specified in the initial documentation.

• Ensure documentation clearly states "malunion" and that the initial fracture was "open type I or II."
• Do not use for nonunion (failure to heal) or delayed union (healing slower than expected).
• Always sequence this code after the primary reason for the encounter, if applicable.