Oth fx shaft of unsp ulna, subs for clos fx w delay heal

This code signifies a fracture of the main body of the ulna bone, where the specific location on the shaft is not documented. It indicates that the patient is in a subsequent phase of treatment for a closed fracture (skin intact) that is not healing at the expected rate.

Apply this code when a patient presents for follow-up care of an ulnar shaft fracture that was initially treated conservatively or surgically, and the physician notes delayed union or non-union of the fracture site. This is appropriate for encounters where the primary focus is monitoring the healing process of a previously diagnosed fracture.

• Ensure documentation specifies "subsequent encounter" and "delayed healing" for a closed fracture.
• Confirm the fracture is of the ulna shaft and not a different part of the bone (e.g., olecranon, styloid process).
• Do not use for initial treatment or for fractures that are healing normally.