Rheumatoid myopathy with rheumatoid arthritis of unsp wrist

This code signifies a muscular disorder directly associated with rheumatoid arthritis, specifically affecting an unspecified wrist. It describes a patient experiencing muscle weakness, pain, or atrophy that is a direct complication of their underlying rheumatoid arthritis.

Apply this code when documentation clearly indicates a diagnosis of rheumatoid myopathy in a patient with rheumatoid arthritis, and the wrist is identified as the affected anatomical site, but laterality is not specified. Supporting documentation should include physician notes detailing the myopathy and its link to the RA, along with the affected wrist.

• Ensure documentation specifies "myopathy" and not just general muscle pain or weakness, as the latter may indicate a different code.
• Verify that the wrist is the affected joint; if other joints are involved, additional codes may be necessary.
• Always sequence the underlying rheumatoid arthritis code (e.g., M05.xx) before this code, as it represents a manifestation.