Rheu arthritis w rheu factor of r knee w/o org/sys involv

This code signifies a diagnosis of rheumatoid arthritis (RA) affecting the right knee, confirmed by the presence of rheumatoid factor (RF). It specifically indicates that the disease is localized to the joint without evidence of systemic complications or involvement of other organs.

Apply this code when documentation clearly states a diagnosis of seropositive rheumatoid arthritis impacting the right knee. This is appropriate when the physician explicitly rules out or does not document any extra-articular manifestations or organ system involvement.

• Ensure documentation specifies "right knee" and "rheumatoid factor positive" to support this code.
• Do not use if there is any mention of systemic involvement (e.g., vasculitis, lung disease, cardiac involvement); instead, select a more specific code from the M05.7 category.
• Consider sequencing this code after any acute exacerbation or complication if applicable, following ICD-10-CM guidelines.