Felty's syndrome, unspecified hip

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 manifestation of Felty's syndrome affects an unspecified hip joint.

Use this code when the patient's medical record clearly documents a diagnosis of Felty's syndrome with involvement of a hip joint, but the laterality (left or right) is not specified. Documentation should confirm the presence of rheumatoid arthritis, splenomegaly, and neutropenia, along with hip symptoms attributable to the syndrome.

• Ensure documentation explicitly states "unspecified hip" or lacks laterality for hip involvement.
• Always code the underlying rheumatoid arthritis (e.g., M05.xx) as the primary diagnosis, with Felty's syndrome as a secondary condition.
• Avoid using this code if the documentation specifies either the left or right hip; instead, use the more specific codes (M05.051 or M05.052).