Disp fx of post pro of unsp talus, subs for fx w nonunion

This code signifies a fracture of the posterior process of the talus, a bone in the ankle, where the broken bone fragments are no longer in their normal alignment. The "subsequent encounter" indicates that this is not the initial treatment for the fracture, and "nonunion" means the bone is failing to heal properly.

Use this code for follow-up visits where a patient is being treated for a previously diagnosed displaced posterior talus fracture that has not healed. This would apply when the physician is assessing the nonunion, planning further intervention, or managing complications related to the lack of healing.

• Ensure documentation clearly specifies "nonunion" and "displaced" for the posterior process of the talus.
• Verify that this is a subsequent encounter, not the initial treatment.
• Confirm the laterality is unspecified; if left or right is documented, a more specific code should be used.