Incomplete atypical femoral fracture, left leg, 7thK

This code signifies an incomplete stress fracture of the left femur, specifically an atypical femoral fracture (AFF), which has not healed as expected. The "subsequent encounter" indicates the patient is receiving ongoing care for this fracture, and "nonunion" confirms that the bone fragments have failed to unite after a reasonable healing period.

Apply this code when a patient presents for follow-up care of a previously diagnosed, incomplete atypical femoral fracture of the left leg that has not achieved union. Documentation should clearly state "nonunion" or "failed healing" of the left femoral fracture, along with the "atypical" nature and "incomplete" status.

• Ensure documentation specifies "left leg" and "incomplete" to differentiate from complete or right-sided fractures.
• Verify "atypical femoral fracture" is explicitly stated or clearly implied by the clinical context (e.g., associated with bisphosphonate use).
• Do not use this code for initial encounters or for fractures that are healing normally; look for codes indicating "subsequent encounter for fracture with routine healing" or "initial encounter."