Displ spiral fx shaft of unsp fibula, 7thN

This code describes a specific type of fibula fracture involving a spiral break in the shaft, where the bone fragments are no longer in their normal alignment. It indicates that the fracture is an open fracture (meaning the skin and soft tissues are also compromised) of a severe nature (Type IIIA, IIIB, or IIIC) and, critically, that the bone has failed to heal properly after an initial treatment, leading to a nonunion. This code is used for subsequent encounters, not the initial treatment.

Use this code when documenting follow-up care for a patient who previously sustained a severe open spiral fracture of the fibula shaft, and imaging or clinical assessment confirms that the fracture has not united. This applies to ongoing management, surgical intervention for nonunion, or monitoring of the nonunion. It is appropriate for cases where the specific fibula (left or right) was not documented.

• Ensure documentation clearly specifies "nonunion" and the "subsequent encounter" status.
• Verify the open fracture type (IIIA, IIIB, or IIIC) is documented, as this is a specific inclusion criterion.
• Confirm that the fracture is of the fibula shaft and has a spiral displacement pattern.