Rheumatoid myopathy with rheumatoid arthritis of right wrist

This code signifies a muscular disorder directly associated with rheumatoid arthritis, specifically affecting the right wrist. It indicates that the patient is experiencing muscle involvement (myopathy) as a systemic manifestation of their rheumatoid arthritis, localized to the right wrist joint.

This code is appropriate when documentation clearly states a diagnosis of rheumatoid myopathy in a patient with rheumatoid arthritis, with the primary site of manifestation being the right wrist. Supporting documentation would include physician notes detailing muscle weakness, pain, or atrophy in the right wrist region, explicitly linked to the underlying rheumatoid arthritis.

• Ensure documentation specifies "myopathy" and not just general muscle pain or weakness, as myopathy implies a distinct muscle disease.
• Verify the laterality (right wrist) is clearly documented.
• This code should be sequenced after the primary rheumatoid arthritis code (e.g., M05.xx).