Displ transverse fx shaft of l ulna, 7thM

This code describes a situation where the patient has a fracture of the shaft of their left ulna that is broken completely across (transverse) and the bone fragments are not in proper alignment (displaced). This specific instance involves an open fracture (Type I or II), meaning the skin was broken, and the fracture has failed to heal after a previous treatment (nonunion).

Use this code for follow-up encounters with a patient who has a previously treated, but now unhealed, open transverse fracture of the left ulnar shaft. This would apply when the patient is returning for ongoing management, assessment of nonunion, or planning for further intervention due to the lack of healing.

• Ensure documentation clearly states "nonunion" and specifies the "left ulna" and "transverse" nature of the fracture.
• Verify the fracture was an "open fracture type I or II" at the initial injury, as this impacts the S52.222 subcategory.
• Confirm this is a "subsequent encounter" for the nonunion, not the initial treatment of the fracture.