Monteggia's fracture of unspecified ulna, sequela

This code signifies a Monteggia fracture of the ulna that is no longer in the acute phase of treatment but is still causing ongoing issues or requiring follow-up care. A Monteggia fracture involves a fracture of the ulna with an associated dislocation of the radial head. The "unspecified" nature indicates the laterality (left or right) is not documented.

Apply this code when a patient presents for follow-up of a previously treated Monteggia fracture of an unspecified ulna, and there are residual symptoms, complications, or the need for continued monitoring related to the original injury. This includes cases of malunion, nonunion, chronic pain, limited range of motion, or other long-term effects attributable to the fracture.

• Ensure documentation clearly indicates the fracture is no longer acute and the encounter addresses a sequela.
• Verify the laterality of the ulna is not specified in the medical record before using the "unspecified" digit.
• Always sequence this code after the primary reason for the encounter, if applicable, or as the primary diagnosis if the sequela is the sole reason for the visit.