Villonodular synovitis (pigmented), right shoulder

This code identifies pigmented villonodular synovitis (PVNS) affecting the right shoulder joint. PVNS is a rare, benign proliferative disorder of the synovial membrane, characterized by villous and nodular growths that often contain hemosiderin deposits, leading to a brownish discoloration. It can cause joint pain, swelling, and limited range of motion.

Apply this code when documentation explicitly states a diagnosis of pigmented villonodular synovitis located in the right shoulder. This diagnosis is typically confirmed through imaging studies (MRI) and often by biopsy of the synovial tissue. Use for both initial diagnoses and follow-up care related to this specific condition and location.

• Ensure laterality is clearly documented (right shoulder) to avoid unspecified or bilateral coding.
• Distinguish from other forms of synovitis or arthropathy; PVNS has specific pathological features.
• Code any associated complications, such as joint effusion or degenerative changes, separately if documented.