Oth fx upr end l tibia, subs for opn fx type I/2 w nonunion

This code signifies a non-healing fracture in the upper portion of the left shin bone, specifically an open fracture initially classified as Type I or II. The patient is in a later stage of treatment, beyond the initial injury, where the bone has failed to unite.

Apply this code when documenting follow-up care for a patient with a previously diagnosed open fracture (Type I or II) of the proximal left tibia that has not healed. This includes situations involving ongoing management, surgical intervention for nonunion, or evaluation of the nonunion's progress.

• Ensure documentation clearly specifies "nonunion" and the initial open fracture type (I or II).
• Verify the encounter is for subsequent care, not the initial treatment of the fracture.
• Confirm the fracture location is the upper end of the left tibia.