Other disorders of bone development and growth, left ulna

This diagnosis code signifies a non-specific developmental or growth abnormality affecting the left ulna. It encompasses various congenital or acquired conditions that disrupt the normal formation or maturation of this forearm bone, excluding fractures or inflammatory processes.

Utilize this code when documentation indicates an "other" specified disorder of bone development or growth in the left ulna, such as congenital pseudarthrosis, osteochondroma, or other dysplasias not classified elsewhere. Supporting documentation should clearly identify the left ulna as the affected bone and describe the nature of the developmental or growth anomaly.

• Ensure the medical record specifies "left ulna" and not a general forearm or unspecified bone disorder.
• Avoid using this code for acute injuries, infections, or neoplastic conditions; these have more specific codes.
• Review for more specific codes within the M89 category if the exact disorder (e.g., osteogenesis imperfecta, fibrous dysplasia) is documented.