Greenstick fx shaft of left ulna, subs for fx w nonunion

This code signifies a specific type of incomplete fracture, a greenstick fracture, affecting the shaft of the left ulna. The "subsequent encounter" indicates that the patient is receiving follow-up care for this fracture, and the "nonunion" specifies that the bone fragments have failed to heal together after a reasonable period.

This code is appropriate for encounters where a patient is being treated for a previously diagnosed greenstick fracture of the left ulnar shaft that has not healed. This includes follow-up appointments for casting, bracing, physical therapy, or surgical planning related to the nonunion. It would not be used for the initial diagnosis of the fracture.

• Always verify the laterality (left) and the specific bone (ulna) and location (shaft) of the fracture.
• Confirm documentation clearly states "greenstick fracture" and "nonunion" for accurate code assignment.
• Ensure the encounter is for subsequent care, not the initial treatment, as indicated by the 7th character 'K'.