Fx unsp part of neck of l femur, subs for clos fx w nonunion

This code signifies a fracture located in an unspecified region of the neck of the left femur that has not healed properly after a previous treatment for a closed fracture. The "subsequent encounter" indicates the patient is receiving ongoing care for this nonunion, rather than initial treatment.

This code is appropriate for follow-up visits where a patient is being managed for a left femoral neck fracture that has failed to unite, and the initial fracture was closed. This includes scenarios such as monitoring nonunion progression, planning for revision surgery, or managing complications related to the nonunion.

• Ensure documentation clearly states "nonunion" and specifies the left femur.
• Verify the original fracture was closed; open fractures have different subsequent encounter codes.
• This code is for subsequent care; use initial encounter codes for the first treatment of the fracture.