Felty's syndrome, left elbow

This code signifies Felty's syndrome affecting the left elbow. Felty's syndrome is a rare, severe form of rheumatoid arthritis characterized by the triad of seropositive rheumatoid arthritis, splenomegaly, and neutropenia. The "2" in the fifth character specifies involvement of the left elbow joint.

Apply this code when documentation clearly indicates a diagnosis of Felty's syndrome with specific manifestation in the patient's left elbow. Supporting documentation should include physician notes detailing the diagnosis of Felty's syndrome and explicit mention of left elbow involvement, often with associated symptoms like pain, swelling, or limited range of motion.

• Ensure documentation explicitly states "Felty's syndrome" and not just severe rheumatoid arthritis.
• Verify the laterality (left) and specific joint (elbow) are clearly documented.
• Code any associated neutropenia (D70.0) and splenomegaly (R16.1) separately, as these are integral components of Felty's syndrome.