Oth fx upper end of left ulna, subs for clos fx w malunion

This code signifies a subsequent encounter for a patient experiencing a malunion of an "other" type of fracture to the upper end of their left ulna. Malunion indicates that the fracture has healed but in an unsatisfactory position, potentially leading to functional impairment. The "P" seventh character specifies that this is a subsequent encounter for a closed fracture.

This code is appropriate when a patient presents for follow-up care, assessment, or management of a previously treated closed fracture of the upper left ulna that has healed with malunion. This could include evaluations for pain, limited range of motion, or planning for corrective procedures related to the malunion.

• Ensure the documentation clearly states "malunion" and specifies the "upper end" of the left ulna.
• Verify that the encounter is for follow-up care after the initial treatment of the closed fracture, justifying the "P" seventh character.
• Distinguish from nonunion (S52.092N), which indicates a failure of the fracture to heal.