Osteitis deformans of left hand

This code describes Paget's disease of bone, specifically affecting the left hand. It is a chronic disorder characterized by abnormal bone remodeling, leading to enlarged, deformed, and weakened bones in this specific anatomical location. The affected bone tissue is structurally unsound and prone to fracture.

Use this code when documentation explicitly states a diagnosis of Paget's disease (osteitis deformans) localized to the left hand. This diagnosis is typically confirmed through imaging studies (e.g., X-rays showing characteristic bone changes) and elevated serum alkaline phosphatase levels. It applies to both initial and subsequent encounters for this condition.

• Ensure laterality is clearly documented as "left hand" to support this specific code.
• Do not confuse with other forms of osteitis or localized bone conditions; Paget's disease has distinct pathological features.
• Code any associated pathological fractures of the left hand due to Paget's disease as secondary diagnoses.