Felty's syndrome, right ankle and foot

This code identifies Felty's syndrome, a rare and severe manifestation of rheumatoid arthritis characterized by the triad of seropositive rheumatoid arthritis, splenomegaly, and neutropenia. Specifically, this code indicates the involvement of the right ankle and foot in a patient diagnosed with Felty's syndrome.

Apply this code when documentation confirms a diagnosis of Felty's syndrome with specific involvement of the right ankle and foot. Supporting clinical notes should detail the presence of rheumatoid arthritis, splenomegaly, neutropenia, and objective findings related to the right ankle and foot.

• Always sequence the underlying rheumatoid arthritis code (e.g., M05.0-) first, followed by this code for the specific manifestation.
• Ensure documentation clearly specifies "Felty's syndrome" and the laterality of the affected joint (right ankle and foot).
• Do not confuse with other forms of rheumatoid arthritis without the characteristic triad of Felty's syndrome.