Hypertrophy of bone, right ulna

This diagnosis code signifies an abnormal enlargement or overgrowth of the bone tissue specifically affecting the right ulna. This hypertrophy can result from various underlying causes, leading to increased bone density or size in this forearm bone.

Apply this code when documentation clearly indicates an abnormal increase in the size or density of the right ulnar bone. This is typically supported by imaging studies (e.g., X-ray, CT, MRI) and a physician's diagnostic statement. It may be seen in conditions like Paget's disease, chronic osteomyelitis, or as a response to chronic stress.

• Ensure the laterality (right) is explicitly documented for the ulna.
• Distinguish from bone spurs (osteophytes) or bone tumors, which have different codes.
• Look for an underlying cause of the hypertrophy, as it may require an additional diagnosis code.