Unsp fx navicular bone of left wrist, subs for fx w nonunion

This code signifies a fracture of the scaphoid bone in the left wrist that was not specified in terms of type or displacement, and is currently being treated for a nonunion. Nonunion indicates that the bone fragments have failed to heal together after a significant period.

Apply this code when documentation confirms a left scaphoid fracture with nonunion, and the patient is presenting for follow-up care, cast changes, physical therapy, or surgical planning related to the nonunion. This is appropriate for any encounter after the initial treatment of the fracture.

• Ensure documentation explicitly states "nonunion" for the left scaphoid fracture.
• Verify that the encounter is for subsequent care, not the initial treatment.
• If the type or displacement of the scaphoid fracture is specified, a more specific code should be used.