Rheumatoid arthritis with rheumatoid factor, unspecified

This code signifies a diagnosis of rheumatoid arthritis where the presence of rheumatoid factor (RF) has been confirmed, but the specific anatomical site or systemic manifestations are not documented. It indicates a seropositive form of this chronic autoimmune inflammatory disease primarily affecting joints.

Apply this code when documentation confirms a diagnosis of rheumatoid arthritis and a positive rheumatoid factor, without further specification of joint involvement (e.g., polyarticular, specific joint) or systemic complications. This is appropriate when the provider has not specified laterality or specific joints affected.

• Avoid using this code if specific joint involvement (e.g., hand, foot) or systemic manifestations are documented; instead, use a more specific M05.- code.
• Ensure documentation explicitly states "rheumatoid arthritis" and "rheumatoid factor positive" or similar.
• This code is often used as a default when the provider's documentation is not granular enough for a more specific M05.- subcategory.