Major osseous defect, unspecified humerus

This code signifies a significant structural deficiency or loss of bone tissue in the humerus, the long bone of the upper arm, without further specification of the exact location within the humerus. This defect can result from trauma, infection, tumor resection, or congenital anomalies, leading to compromised bone integrity and function.

Apply this code when documentation clearly indicates a major osseous defect of the humerus, but the specific site (e.g., proximal, shaft, distal) is not detailed. This code is appropriate when the physician's notes describe a substantial bone void or loss in the humerus without further anatomical precision.

• Avoid using this code if the documentation specifies the exact location of the osseous defect within the humerus; instead, use a more specific M89.72- subcategory.
• Ensure the documentation supports a "major" defect, as opposed to a minor cortical irregularity or small bone cyst.
• Always sequence this code after any underlying cause of the osseous defect, such as a fracture (S42.-), osteomyelitis (M86.-), or neoplasm (C40.0-).