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

This code signifies an unspecified fracture of the upper portion of the left ulna that is currently in a healing phase, but has united in an anatomically incorrect position (malunion). The fracture was initially closed, meaning the skin remained intact.

This code is appropriate for follow-up encounters where a patient is being treated for complications arising from a malunited, previously closed, unspecified fracture of the proximal left ulna. This could include assessment for pain, limited range of motion, or planning for corrective surgery due to the malunion.

• Ensure documentation clearly states "malunion" and specifies the left ulna.
• Verify the encounter is for a subsequent visit, not the initial treatment of the fracture.
• Confirm the fracture was initially closed; open fractures have different coding pathways.