Unsp fx lower end of right ulna, subs for clos fx w nonunion

This code signifies a fracture of the lower portion of the right ulna where the specific type of fracture (e.g., transverse, oblique) is not documented. The "subsequent encounter" indicates the patient is receiving routine care during the healing phase of a closed fracture, but the bone is failing to unite properly.

Apply this code when a patient presents for follow-up care of a right distal ulnar fracture that was initially closed, and the provider explicitly documents nonunion. This is appropriate for ongoing management, such as cast changes, physical therapy, or preparation for surgical intervention due to the nonunion.

• Ensure documentation clearly states "nonunion" for a closed fracture.
• Verify the encounter is for subsequent care, not the initial treatment.
• Confirm the fracture location is the lower end of the right ulna and the type is unspecified.