Displ seg fx shaft of ulna, unsp arm, 7thK

This code signifies a fracture in the middle section of the ulna bone, which is one of the two long bones in the forearm. The fracture is "segmental," meaning there are at least two fracture lines isolating a segment of bone, and "displaced," indicating the bone fragments are not properly aligned. "Nonunion" means the fracture has failed to heal after the expected healing period.

Apply this code when documenting a patient's follow-up visit for a previously treated closed segmental ulna shaft fracture that has not healed. This is used when the fracture is in an unspecified arm and the patient is receiving ongoing care for the nonunion, such as further conservative management or preparation for surgical intervention.

• Ensure documentation clearly states "nonunion" and that the fracture is "segmental" and "displaced."
• Verify this is a "subsequent encounter" for a "closed fracture."
• Confirm the laterality (left or right arm) is truly unspecified in the medical record; otherwise, a more specific code should be used.