Osteitis deformans in neoplastic diseases, right ank/ft

This code signifies Paget's disease of bone (osteitis deformans) occurring as a manifestation or complication of a neoplastic process, specifically affecting the bones of the right ankle and foot. It indicates a secondary form of Paget's disease, where the underlying malignancy is a contributing factor.

Use this code when documentation clearly links osteitis deformans in the right ankle and foot to an existing or concurrent neoplastic disease. This applies when the Paget's disease is considered a paraneoplastic syndrome, a metastatic effect, or otherwise directly related to the cancer. Documentation should specify the laterality (right) and anatomical site (ankle and foot).

• Always sequence the underlying neoplastic disease code first, followed by this code.
• Ensure documentation specifies "right" ankle and foot; do not use for unspecified laterality or other sites.
• Distinguish from primary Paget's disease (M88.-) which is not associated with neoplastic conditions.