Fibrous dysplasia (monostotic), left hand

This code describes a benign bone tumor characterized by the replacement of normal bone with fibrous tissue and immature woven bone, specifically affecting a single bone (monostotic) in the left hand. This condition can lead to bone weakness, pain, and deformity.

Use this code for patients diagnosed with fibrous dysplasia confirmed to be present in only one bone of the left hand. Documentation should clearly state "monostotic" and specify the left hand as the affected site. This code is appropriate when the physician's notes indicate the presence of this specific bone lesion.

• Ensure documentation specifies "monostotic" to differentiate from polyostotic forms.
• Verify the laterality (left hand) is clearly documented.
• Do not confuse with other benign bone tumors or cysts; confirm the diagnosis of fibrous dysplasia.