Osteonecrosis due to previous trauma, unspecified humerus

This code signifies the death of bone tissue in an unspecified humerus resulting from a prior traumatic injury. This avascular necrosis impairs bone integrity and function, leading to pain and potential joint collapse. The "unspecified" nature indicates the laterality (left or right) is not documented.

Apply this code when documentation clearly states osteonecrosis of the humerus is a sequela of a previous trauma, and the specific side (left or right) is not specified. This diagnosis is typically supported by imaging studies (e.g., MRI, X-ray) showing bone infarction and a history of trauma to the shoulder or arm.

• Ensure the documentation explicitly links the osteonecrosis to a previous trauma, not an acute injury.
• If laterality is documented (left or right humerus), use the more specific codes (M87.221 or M87.222).
• Code any associated pain or functional limitations separately, if applicable and documented.