Felty's syndrome, unspecified elbow

This code identifies Felty's syndrome, a rare and severe complication of rheumatoid arthritis characterized by the triad of seropositive rheumatoid arthritis, splenomegaly, and neutropenia. This specific code is used when the elbow is affected, but the laterality (right or left) is not specified in the medical record.

Use this code when documentation confirms a diagnosis of Felty's syndrome and indicates involvement of the elbow, without specifying which elbow. This diagnosis is typically supported by laboratory findings (e.g., neutropenia, positive rheumatoid factor), imaging studies showing joint damage, and physical examination findings consistent with rheumatoid arthritis and splenomegaly.

• Always attempt to clarify laterality (right or left elbow) with the provider if not documented, to use a more specific code.
• Code the underlying rheumatoid arthritis (e.g., M05.xx) as a primary diagnosis if it is the main reason for the encounter, or as an additional diagnosis.
• Do not confuse with other forms of inflammatory polyarthropathies; Felty's syndrome requires the specific triad of symptoms.