Villonodular synovitis (pigmented), left wrist

This code describes pigmented villonodular synovitis (PVNS) affecting the synovial lining of the left wrist joint. PVNS is a rare, benign, proliferative disorder characterized by the overgrowth of the synovium, leading to villous and nodular formations, often with hemosiderin deposition causing its characteristic pigmentation.

Use this code when documentation explicitly states a diagnosis of pigmented villonodular synovitis localized to the left wrist. This diagnosis is typically confirmed through imaging (MRI) and often biopsy or surgical pathology.

• Ensure laterality is clearly documented as left wrist.
• Distinguish from other forms of synovitis or tenosynovitis that are not specifically pigmented villonodular.
• Code any associated complications, such as joint effusion or degenerative changes, separately if documented.