4-part fx surg neck of unsp humerus, subs for fx w malunion

This code describes a complex fracture involving four distinct fragments of the surgical neck of the humerus, where the bone has healed in an abnormal or misaligned position. This specific code is used when the patient is receiving follow-up care for this malunited fracture.

Use this code for patients presenting for ongoing management, evaluation, or treatment of a previously diagnosed 4-part surgical neck humerus fracture that has healed incorrectly. This includes scenarios such as planning for corrective surgery, physical therapy for functional limitations due to malunion, or monitoring the long-term effects of the malunion.

• Ensure documentation clearly states "malunion" and specifies the "surgical neck" and "4-part" nature of the fracture.
• This code is for subsequent encounters, meaning the initial treatment for the acute fracture has already occurred.
• Laterality (left/right) is unspecified with this code; if known, a more specific code should be used.