Osteitis deformans in neoplastic diseases, right hand

This code signifies Paget's disease of bone (osteitis deformans) occurring in the right hand, specifically when it is associated with a neoplastic process. It describes a chronic bone remodeling disorder characterized by localized areas of increased bone turnover, leading to enlarged and deformed bones, in the context of a co-occurring tumor or cancerous condition.

Use this code when documentation clearly indicates a diagnosis of osteitis deformans affecting the right hand, and there is a documented link or association with a neoplastic disease. Supporting documentation would include pathology reports, imaging studies (X-rays, bone scans), and physician notes explicitly stating both conditions and the anatomical site.

• Always code the underlying neoplastic disease first, followed by this code.
• Ensure the documentation specifies "right hand" as the affected site; laterality is crucial.
• Distinguish from Paget's disease without an associated neoplasm (M88.- series) or other forms of osteitis.