Unsp fx shaft of l ulna, 7thN

This code signifies a persistent failure of an open fracture of the shaft of the left ulna to heal, specifically when the initial injury was a severe open fracture (Type IIIA, IIIB, or IIIC). It indicates that the patient is returning for ongoing treatment of this nonunion.

Use this code for patients presenting for follow-up care, surgical intervention, or other management related to a previously diagnosed open fracture of the left ulnar shaft that has not united. This applies when the original fracture was classified as a Gustilo-Anderson Type IIIA, IIIB, or IIIC open fracture.

• Ensure documentation clearly specifies "nonunion" and the "subsequent encounter" for the fracture.
• Verify the original fracture was of the left ulna shaft and an open fracture type IIIA, IIIB, or IIIC.
• Do not use for initial encounters or for malunion; a specific nonunion code is required.