Fibrous dysplasia (monostotic), right ankle and foot

This code represents a benign, chronic bone disorder characterized by the replacement of normal bone with fibrous tissue and immature woven bone, specifically affecting a single bone (monostotic) in the right ankle or foot. This leads to weakened bone structure, which can result in pain, deformity, and an increased risk of pathological fractures in the affected area.

Use this code for patients diagnosed with monostotic fibrous dysplasia confirmed to be located in the right ankle or foot. Documentation should clearly specify the diagnosis of fibrous dysplasia, its monostotic nature, and the precise anatomical location. This code is appropriate when the physician's assessment, imaging studies (e.g., X-rays, MRI), or biopsy results confirm the condition.

• Ensure documentation specifies "monostotic" to differentiate from polyostotic fibrous dysplasia.
• Verify the laterality (right) and specific anatomical site (ankle and foot) are clearly stated in the medical record.
• Do not confuse with other bone dysplasias or benign bone tumors; confirm the specific diagnosis of fibrous dysplasia.