Oth rheumatoid arthritis w rheumatoid factor of right ank/ft

This code signifies a specific type of inflammatory arthritis affecting the right ankle and/or foot, characterized by the presence of rheumatoid factor (RF). It indicates a form of rheumatoid arthritis that doesn't fit into more specific categories, but still involves the immune system attacking the joints in the lower extremity.

Use this code when documentation confirms a diagnosis of rheumatoid arthritis, positive rheumatoid factor, and the primary affected site is the right ankle and/or foot. This would typically be supported by physician notes detailing joint pain, swelling, stiffness, and laboratory results confirming RF positivity.

• Ensure the documentation explicitly states "right ankle and foot" or specifies both joints on the right side.
• Confirm the presence of rheumatoid factor (RF positive) to differentiate from seronegative rheumatoid arthritis.
• Do not use for other forms of inflammatory arthritis, such as psoriatic arthritis or gout, even if affecting the same joint.