Multiple fx of ribs, unsp side, subs for fx w nonunion

This code signifies a patient presenting with multiple rib fractures that have failed to heal properly, indicating a nonunion of the bone fragments. The specific side of the body affected by these fractures is not documented.

This code is appropriate for follow-up encounters where a previously diagnosed multiple rib fracture is now complicated by nonunion. It would be used when the patient is receiving ongoing treatment for the nonunion, such as surgical intervention or specialized therapies, after the initial fracture management.

• Always sequence this code after the primary diagnosis indicating the reason for the encounter.
• Ensure documentation clearly states "nonunion" and "multiple rib fractures."
• Verify that the encounter is indeed "subsequent" and not an initial treatment for the nonunion.