Ankylosis, right knee

This code signifies the pathological fusion or immobility of the right knee joint. This can result from various underlying conditions, leading to a significant loss of range of motion and functional impairment. The joint surfaces become stiffened or completely fused, preventing normal articulation.

Use this code when documentation explicitly states ankylosis or fusion of the right knee. This diagnosis is typically supported by imaging studies (e.g., X-rays, MRI) demonstrating joint space narrowing, bony bridging, or complete obliteration of the joint space, along with clinical findings of severely restricted or absent knee movement.

• Ensure laterality is clearly documented as "right knee" to avoid incorrect coding.
• Distinguish from arthrosis (osteoarthritis) without fusion, which involves joint degeneration but not complete immobility.
• Code any underlying cause of the ankylosis (e.g., rheumatoid arthritis, trauma) as an additional diagnosis.