Unsp fx low end unsp femr, 7thN

This code signifies a fracture of the lower part of the thigh bone, where the specific location or type of fracture is not documented. It indicates that the fracture was initially an open fracture (meaning the bone broke through the skin) of a severe type (IIIA, IIIB, or IIIC), and the patient is now being treated for the bone not healing properly (nonunion).

Use this code for follow-up encounters when a patient presents with an unhealed, previously open, severe fracture of the distal femur. This applies when the initial fracture details are vague, but the nonunion of a severe open fracture is the focus of the current treatment. This code is appropriate for ongoing management of the nonunion, such as surgical intervention or prolonged casting.

• Requires a seventh character "N" for nonunion, indicating a subsequent encounter.
• Only use when the specific site or type of distal femur fracture is truly unspecified in the medical record.
• Ensure documentation clearly states the original fracture was an open fracture type IIIA, IIIB, or IIIC.