Aneurysmal bone cyst, right hand

This code identifies a benign, expansile, blood-filled lesion within the bone of the right hand. It is characterized by multiple blood-filled spaces separated by fibrous septa and is not a true aneurysm. This condition often presents with pain, swelling, and sometimes a palpable mass.

Apply this code when documentation clearly indicates a diagnosis of an aneurysmal bone cyst specifically located in the right hand. This diagnosis is typically confirmed through imaging studies (X-ray, MRI) and often biopsy. Use this code for initial diagnosis, follow-up, or treatment of this specific bone lesion.

• Ensure the documentation specifies "aneurysmal bone cyst" and not another type of bone cyst or tumor.
• Verify the laterality is explicitly stated as "right hand" to avoid miscoding to an unspecified or left-sided lesion.
• Do not confuse with simple bone cysts (M85.6-) or other benign bone neoplasms (D16.-).