Rheumatoid myopathy with rheumatoid arthritis of left wrist

This code signifies a muscular disorder (myopathy) directly caused by or associated with rheumatoid arthritis, specifically affecting the left wrist. It indicates that the rheumatoid arthritis has manifested with muscle involvement in this particular joint.

Apply this code when documentation clearly states a diagnosis of rheumatoid myopathy in a patient with rheumatoid arthritis, with the left wrist identified as the affected anatomical site. Supporting documentation should include physician notes detailing the myopathic symptoms and their direct link to the patient's rheumatoid arthritis affecting the left wrist.

• Ensure the documentation explicitly links the myopathy to rheumatoid arthritis and specifies the left wrist.
• Do not use this code for general muscle weakness or pain in the wrist unless it's definitively diagnosed as rheumatoid myopathy.
• Always sequence this code after the primary rheumatoid arthritis code (e.g., M05.xx or M06.xx) to show the causal relationship.