Other osteonecrosis, unspecified humerus

This code signifies the death of bone tissue in the humerus due to a loss of blood supply, not specified as a particular type of osteonecrosis. It indicates a condition where the bone cells in the upper arm bone have died, leading to potential bone collapse and joint damage. The specific cause or type of osteonecrosis is not identified.

Use this code when documentation confirms osteonecrosis of the humerus, but the specific type (e.g., idiopathic, post-traumatic, steroid-induced) is not clearly stated or is considered "other" than those with more specific codes. This code is appropriate when the medical record indicates bone death in the humerus without further etiological detail.

• Ensure the documentation specifies the humerus as the affected bone; avoid using for other long bones.
• Prioritize more specific codes for osteonecrosis if the type is documented (e.g., M87.1xx for drug-induced).
• If the laterality (left or right humerus) is known, use the more specific code (M87.821 or M87.822) instead of this unspecified laterality code.