Villonodular synovitis (pigmented), right hip

This code describes pigmented villonodular synovitis (PVNS) affecting the right hip joint. PVNS is a rare, benign, proliferative disorder of the synovial membrane, characterized by villous and nodular growths, hemosiderin deposition, and often causing joint pain, swelling, and limited range of motion.

Use this code for documented cases of PVNS specifically localized to the right hip. Supporting documentation should include imaging reports (e.g., MRI showing synovial proliferation and hemosiderin), pathology reports confirming PVNS from biopsy or synovectomy, and physician notes detailing the diagnosis and affected joint.

• Ensure laterality is clearly documented; use M12.252 for the left hip and M12.259 for unspecified hip.
• Do not confuse PVNS with other forms of synovitis; look for specific mention of "pigmented villonodular" or "PVNS."
• Code any associated complications or symptoms (e.g., pain, effusion) separately if they meet reporting criteria.