Villonodular synovitis (pigmented), right hand

This code describes pigmented villonodular synovitis (PVNS) affecting the right hand. PVNS is a rare, benign proliferative disorder of the synovial membrane, characterized by villous and nodular growth, hemosiderin deposition, and often causing joint pain, swelling, and restricted movement.

Apply this code when documentation clearly indicates a diagnosis of pigmented villonodular synovitis specifically located in the right hand. This diagnosis is typically confirmed through imaging (MRI) and often biopsy. Use this code for both initial diagnoses and subsequent encounters related to the condition.

• Ensure laterality is precisely documented; do not use this code for left hand or unspecified hand involvement.
• Distinguish PVNS from other forms of synovitis or synovial lesions, such as giant cell tumor of tendon sheath, which may present similarly.
• Code any associated symptoms (e.g., pain, swelling) separately if they are not integral to the PVNS diagnosis itself.