Osteitis deformans of unspecified bone

This code signifies Paget's disease of bone, a chronic disorder characterized by abnormal bone remodeling, leading to enlarged, misshapen, and weakened bones. It represents the general, unspecified form of the condition without specifying the affected skeletal site.

Apply this code when the medical record documents a diagnosis of Paget's disease but does not specify the particular bone or bones involved. This is often used for initial diagnoses or when the disease is widespread without a dominant site. Documentation should clearly state "Paget's disease" or "osteitis deformans."

• Only use this code when the specific bone(s) affected by Paget's disease are not documented.
• Avoid using this code if a more specific anatomical site (e.g., skull, vertebra, pelvis) is identified; instead, use the appropriate M88.xx subcategory.
• Do not confuse with other bone disorders like osteomyelitis or osteoporosis, which have distinct ICD-10-CM codes.