M05.061
BillableFelty's syndrome, right knee
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 the right knee, a condition combining rheumatoid arthritis with an enlarged spleen and low white blood cell count.
Coding Tips
- •Knee involvement in Felty's syndrome should be documented with supporting clinical findings
- •Ensure this diagnosis is not being confused with other causes of knee arthritis or systemic disease
Clinical Significance
Felty's syndrome affecting the right knee represents a severe rheumatoid condition that significantly compromises mobility and creates dangerous immunosuppression requiring urgent specialized care. Knee involvement severely impacts weight-bearing function while neutropenia and splenomegaly create life-threatening infection risks demanding comprehensive monitoring.
Documentation Requirements
- ✓Specific documentation of rheumatoid arthritis affecting the right knee
- ✓Evidence of splenomegaly through examination or imaging studies
- ✓Laboratory confirmation of neutropenia with specific cell counts
- ✓Right knee involvement with clear laterality documentation
- ✓Assessment of knee function and weight-bearing capacity
- ✓History of infections or immune dysfunction
- ✓Current immunomodulatory therapy and response monitoring
- ✓Physical therapy needs and mobility assistance requirements
Commonly Confused Codes
M05.062 — Same condition but affecting left knee instead of rightM05.9 — Seropositive rheumatoid arthritis without Felty's syndrome componentsM17.11 — Unilateral primary osteoarthritis of right knee without inflammatory basisD70.9 — Neutropenia without rheumatoid arthritis contextM13.161 — Monoarthritis of right knee without systemic components
Code Hierarchy
└M05Rheumatoid arthritis with rheumatoid factor└M05.0Felty's syndrome└M05.06Felty's syndrome, knee└M05.061Felty's syndrome, right knee
└M05.061Felty's syndrome, right knee