Osteitis deformans in neoplastic diseases, left thigh

This code signifies Paget's disease of bone (osteitis deformans) occurring in the left thigh, specifically when the Paget's disease is associated with a neoplastic process. It describes a chronic bone disorder characterized by abnormal bone remodeling, presenting in a specific anatomical location and linked to cancer.

Use this code when documentation clearly indicates a diagnosis of osteitis deformans affecting the left thigh, and there is a documented association or complication with a neoplastic disease. This code is appropriate when the patient has both conditions and the Paget's disease is considered secondary to or influenced by the malignancy.

• Always sequence the underlying neoplastic disease code first, followed by this code, as it indicates a manifestation or complication of the cancer.
• Ensure documentation specifies "left thigh" and the presence of a neoplastic disease to support this specific code.
• Do not confuse with codes for Paget's disease without an associated neoplasm (M88.-) or other forms of osteitis.