Osteitis deformans in neoplastic diseases, unsp ank/ft

This code signifies Paget's disease of bone (osteitis deformans) occurring as a manifestation or complication of a neoplastic disease process, affecting an unspecified ankle or foot. It describes the bone remodeling disorder specifically linked to cancer, rather than primary Paget's disease.

Use this code when documentation clearly links osteitis deformans in the ankle or foot to an underlying neoplastic condition, and the specific ankle or foot is not identified. This would apply when a patient with cancer develops Paget's disease, and the physician explicitly states the connection.

• Always sequence the underlying neoplastic disease code first, as this code represents a manifestation.
• Avoid using this code if the osteitis deformans is not explicitly linked to a neoplastic process; consider M88.x codes for primary Paget's disease.
• Seek clarification if the documentation specifies a particular ankle or foot (e.g., right, left) to allow for a more specific anatomical code.