M05.09
BillableFelty's syndrome, multiple sites
HCC Category Mapping
V28HCC 93 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease
0.175V24HCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease
0.307ESRDHCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease
0.000RxHCCHCC 83 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease
0.000What This Code Means
Felty's syndrome affecting multiple joints throughout the body simultaneously.
Coding Tips
- •This code indicates polyarticular involvement; document which specific sites are affected to support medical necessity
- •Do not use this code if the condition is limited to a single anatomical site; use site-specific codes instead
Clinical Significance
Felty's syndrome affecting multiple sites represents the most severe form of rheumatoid arthritis with systemic involvement creating widespread joint destruction combined with life-threatening hematologic abnormalities. This polyarticular presentation with neutropenia and splenomegaly requires the highest level of specialized care and monitoring due to extensive functional impairment and infection risks.
Documentation Requirements
- ✓Documentation of rheumatoid arthritis affecting multiple joints simultaneously
- ✓Clinical or imaging evidence of splenomegaly
- ✓Laboratory confirmation of neutropenia with specific cell counts
- ✓Multiple site involvement clearly documented (at least two different joint areas)
- ✓Assessment of functional capacity across affected joints
- ✓History of infections or severe immunocompromised complications
- ✓Comprehensive treatment plan addressing systemic nature
- ✓Multidisciplinary care team coordination documentation
Commonly Confused Codes
M05.9 — Seropositive rheumatoid arthritis without Felty's syndrome componentsM06.09 — Rheumatoid arthritis without organ involvement affecting multiple sitesM79.3 — Panniculitis when multiple joint swelling is misinterpretedD70.9 — Neutropenia without rheumatoid arthritis contextM05.8 — Other seropositive rheumatoid arthritis without complete Felty's triad
Code Hierarchy
└M05Rheumatoid arthritis with rheumatoid factor└M05.0Felty's syndrome└M05.09Felty's syndrome, multiple sites
└M05.09Felty's syndrome, multiple sites