Oth fx l patella, subs for opn fx type 3A/B/C w routn heal

This code signifies a follow-up encounter for a patient who sustained an open fracture of the left patella, specifically a severe open fracture (Type IIIA, IIIB, or IIIC), and is now in the routine healing phase. It indicates that the initial injury involved significant soft tissue damage and bone exposure, and the patient is progressing as expected.

Apply this code when documenting subsequent visits for a patient with a previously diagnosed left patellar open fracture (Type IIIA, IIIB, or IIIC) that is healing without complications. This includes routine cast changes, wound checks, or physical therapy sessions during the normal recovery period. Do not use for initial treatment or for encounters involving delayed or nonunion healing.

• Requires a seventh character "F" for subsequent encounter with routine healing.
• Ensure documentation specifies "left patella" and an "open fracture" of Type IIIA, IIIB, or IIIC.
• Confirm that the encounter is for routine follow-up and not for complications or initial treatment.