Rheumatoid myopathy with rheumatoid arthritis of right hand

This code signifies a muscular disorder (myopathy) directly caused by rheumatoid arthritis, specifically affecting the right hand. It indicates that the patient's rheumatoid arthritis has manifested with muscle weakness, pain, or dysfunction in the right hand due to the inflammatory process.

Apply this code when documentation clearly states a diagnosis of rheumatoid myopathy in the context of rheumatoid arthritis, with the primary manifestation localized to the right hand. Supporting documentation should include physician notes detailing the myopathic symptoms and their direct association with the patient's rheumatoid arthritis.

• Ensure the documentation explicitly links the myopathy to rheumatoid arthritis and specifies the right hand.
• Do not use this code for general muscle pain or weakness in the hand not directly attributed to rheumatoid myopathy.
• Always sequence this code after the primary rheumatoid arthritis code (e.g., M05.xx or M06.xx) to indicate the underlying systemic condition.