4-part fx surgical neck of r humerus, subs for fx w nonunion

This code signifies a complex fracture involving four distinct fragments of the surgical neck of the right humerus. The "surgical neck" is a common fracture site, located just below the humeral head. "Nonunion" indicates that the bone fragments have failed to heal together after a previous attempt, requiring further intervention or management.

Apply this code when documenting a patient's follow-up visit for a previously diagnosed 4-part fracture of the right humeral surgical neck that has not successfully united. This would be appropriate for ongoing treatment, evaluation of nonunion, or planning for revision surgery. It specifically applies to subsequent encounters after the initial treatment phase.

• Ensure documentation clearly specifies "nonunion" and not delayed union or malunion.
• Verify the laterality (right humerus) and the specific fracture type (4-part surgical neck).
• Confirm this is a subsequent encounter, as indicated by the 7th character "K".