Osteitis deformans of unspecified ankle and foot

This code signifies Paget's disease affecting an unspecified ankle or foot. Osteitis deformans is a chronic bone disorder characterized by abnormal bone remodeling, leading to enlarged, misshapen, and weakened bones. In this context, the condition specifically impacts the bones of the ankle or foot without further anatomical specificity.

Apply this code when documentation confirms a diagnosis of Paget's disease (osteitis deformans) involving the ankle or foot, and the laterality (right or left) is not specified. This code is appropriate when the physician's notes indicate involvement of the ankle or foot but do not provide further detail regarding the specific bone or side.

• Ensure the documentation explicitly states "unspecified" or lacks laterality for the ankle and foot involvement.
• Avoid using this code if the medical record specifies a particular ankle (e.g., right ankle) or foot (e.g., left foot); instead, use a more specific code from the M88.87- series.
• Consider sequencing this code as a primary diagnosis if the Paget's disease of the ankle/foot is the primary reason for the encounter.