Bent bone of unsp ulna, 7thN

This code signifies a bent bone deformity of the ulna, where the specific side (left or right) is not documented. It indicates that the patient is receiving follow-up care for an open fracture (type IIIA, IIIB, or IIIC) that has failed to heal properly, resulting in a nonunion.

Apply this code when documenting subsequent encounters for patients with an unhealed open ulna fracture (types IIIA, IIIB, or IIIC) that has resulted in a bent bone deformity, and the laterality of the ulna is not specified in the medical record. This is used for ongoing treatment of the nonunion.

• Ensure the documentation clearly states "bent bone" and "nonunion" in the context of an open ulna fracture.
• Verify that the encounter is for subsequent care, not the initial treatment of the fracture.
• Only use this code when the laterality of the ulna (left or right) is explicitly unspecified in the clinical notes.