Unsp fx low end unsp tibia, 7thN

This code indicates a non-specific fracture of the lower part of the tibia, where the exact location or type of fracture is not documented. It specifically applies to a subsequent encounter for an open fracture that was initially classified as Type IIIA, IIIB, or IIIC, and has now developed a nonunion, meaning the bone has failed to heal.

Use this code when documentation confirms a patient is presenting for follow-up care of an open lower tibia fracture (Gustilo-Anderson Type IIIA, IIIB, or IIIC) that has not healed. This code is appropriate when the specific anatomical details of the fracture at the lower end of the tibia are not precisely defined in the medical record.

• Ensure the documentation clearly states "nonunion" for a previously open fracture of the lower tibia.
• Verify that the encounter is "subsequent" and not the initial treatment for the fracture.
• Only use this code when the specific location of the fracture at the lower end of the tibia is not further specified.