Rheumatoid myopathy w rheumatoid arthritis of right shoulder

This code signifies a specific type of muscle disease (myopathy) directly caused by rheumatoid arthritis, affecting the right shoulder. It indicates a direct pathological link between the systemic autoimmune condition and the muscular involvement in that joint.

Apply this code when documentation explicitly states rheumatoid myopathy affecting the right shoulder in a patient with a confirmed diagnosis of rheumatoid arthritis. Clinical notes should describe muscle weakness, pain, or atrophy in the right shoulder region attributed to the underlying rheumatoid disease.

• Ensure documentation clearly links the myopathy to rheumatoid arthritis, not a separate muscular condition.
• Verify laterality (right shoulder) is explicitly stated in the medical record.
• Sequence this code after the primary rheumatoid arthritis code (e.g., M05.xx or M06.xx).