Osteolysis, unspecified upper arm

This code signifies the pathological destruction or dissolution of bone tissue in an unspecified upper arm. It indicates a process of bone resorption that is not further characterized by a specific cause or type. This condition can lead to bone weakness, pain, and increased fracture risk.

Apply this code when documentation indicates osteolysis affecting the upper arm, but the specific type (e.g., neoplastic, infectious, inflammatory) is not identified. This code is appropriate when the physician's notes describe bone loss or destruction in the humerus, without further diagnostic specificity.

• Ensure documentation explicitly states "osteolysis" and specifies the "upper arm" as the affected site.
• Avoid using this code if a more specific type of osteolysis (e.g., M89.50 for unspecified site, M89.5x for other specific sites) is documented.
• Always query the provider for further specificity regarding the cause or type of osteolysis if possible, to allow for more precise coding.