Polyostotic fibrous dysplasia

This code identifies a rare, chronic bone disorder characterized by the replacement of normal bone with fibrous tissue in multiple skeletal sites. This abnormal tissue weakens the bone, leading to pain, deformities, fractures, and other complications. It is a non-hereditary condition resulting from a somatic mutation.

Assign this code when documentation clearly indicates a diagnosis of polyostotic fibrous dysplasia affecting multiple bones. This diagnosis is typically confirmed through imaging studies (X-rays, MRI, CT scans) showing characteristic bone lesions and often bone biopsy. Use this code for patients presenting with symptoms such as bone pain, pathological fractures, or skeletal deformities attributed to this condition.

• Differentiate from monostotic fibrous dysplasia, which affects only a single bone.
• Code any associated pathological fractures or deformities separately, linking them to the underlying fibrous dysplasia.
• Review documentation for specific affected sites, as this may be relevant for further specificity if available in future code updates.