Other secondary osteonecrosis, right humerus

This code indicates osteonecrosis of the right humerus that is secondary to an underlying condition, but not specifically categorized as drug-induced, post-traumatic, or due to caisson disease. It represents the death of bone tissue in the upper arm bone, resulting from an interruption of blood supply, where the etiology is known but falls outside the more specific secondary osteonecrosis categories.

Use this code when documentation specifies osteonecrosis of the right humerus and clearly identifies a secondary cause that is not drug-induced, post-traumatic, or related to caisson disease. Examples include osteonecrosis secondary to systemic lupus erythematosus, sickle cell disease, or pancreatitis affecting the right humerus. Physician documentation must explicitly state "other secondary osteonecrosis" or provide a specific secondary cause that aligns with this "other" category.

• Ensure the documentation specifies "right humerus" and a secondary cause that is not drug-induced, post-traumatic, or caisson disease.
• Distinguish carefully from primary (idiopathic) osteonecrosis and more specific secondary types (e.g., M87.121 for drug-induced).
• Always code the underlying secondary condition first, if applicable, as this code is for a manifestation of that condition.