Osteitis deformans of right upper arm

This code signifies Paget's disease affecting the bones of the right upper arm. It represents a chronic bone disorder characterized by abnormal bone remodeling, leading to enlarged, weakened, and deformed bone structure in this specific anatomical location.

Use this code when documentation explicitly states a diagnosis of Paget's disease (osteitis deformans) localized to the right humerus, ulna, or radius. Supporting documentation should include imaging reports (e.g., X-rays, bone scans) confirming the characteristic bone changes and physician notes detailing the diagnosis and affected site.

• Ensure laterality is clearly documented as "right upper arm"; if unspecified, a different code may be required.
• Distinguish from other bone disorders like osteomyelitis or fibrous dysplasia, which have different ICD-10-CM codes.
• Code any associated pathological fractures or other complications of Paget's disease separately.