Nondisp seg fx shaft of ulna, r arm, 7thN

This code describes a specific type of fracture involving the shaft of the right ulna, where the bone fragments are still in their normal alignment (nondisplaced) but the fracture line is segmented. It further specifies that this is an open fracture of a severe nature (Type IIIA, IIIB, or IIIC) and that the bone has failed to heal properly after an initial treatment (nonunion).

This code is used for follow-up encounters when a patient with a previously treated nondisplaced segmental open fracture of the right ulnar shaft (Type IIIA, IIIB, or IIIC) is presenting with evidence of nonunion. This would typically be documented by an orthopedic surgeon or other treating physician during a subsequent visit for ongoing management of the nonunion.

• Ensure documentation clearly specifies "nondisplaced," "segmental," "shaft of ulna," and "right arm."
• Verify the fracture was initially an "open fracture type IIIA, IIIB, or IIIC" and that "nonunion" is explicitly documented.
• This code is for subsequent encounters; an initial encounter for the fracture would use a different code.