Oth disrd of bone density and structure, left upper arm

This diagnosis code signifies a non-osteoporotic, non-osteomalacic abnormality in the density or structural integrity of the bone specifically located in the patient's left upper arm (humerus). These disorders are distinct from common conditions like osteoporosis or osteomalacia but represent other identified issues affecting bone quality.

Apply this code when documentation specifies a disorder of bone density or structure in the left upper arm that is not otherwise classified as osteoporosis, osteomalacia, or a pathological fracture. Examples include localized osteosclerosis, osteopenia not due to osteoporosis, or other specified structural anomalies of the humerus. Supporting documentation should clearly identify the left upper arm as the affected site and describe the specific nature of the bone density or structural abnormality.

• Ensure the documentation explicitly states "left upper arm" or "left humerus" to support laterality.
• Differentiate from osteopenia (M81.0) or osteoporosis (M81.x) unless the specific disorder is further clarified as distinct.
• Do not use for pathological fractures; instead, refer to the appropriate M84.4- or M84.5- codes for pathological fractures.