Unsp fx upr end l ulna, 7thN

This code signifies a persistent failure of an open fracture of the upper portion of the left ulna to heal, specifically when the initial injury was a severe open fracture (Gustilo-Anderson Type IIIA, IIIB, or IIIC). The fracture type is unspecified, meaning the exact nature of the fracture (e.g., transverse, oblique) is not documented.

Apply this code when a patient presents for ongoing treatment of a nonunion of a previously diagnosed open fracture of the proximal left ulna, and the original open fracture was classified as Type IIIA, IIIB, or IIIC. This indicates a complicated healing process requiring continued medical intervention.

• Always sequence this code after the appropriate code for the open fracture itself, if applicable, to provide full context.
• Ensure documentation clearly specifies "nonunion" and the Gustilo-Anderson classification (IIIA, IIIB, or IIIC) of the original open fracture.
• Verify laterality (left ulna) is explicitly stated in the medical record.