M06.062
BillableRheumatoid arthritis without rheumatoid factor, left 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
Rheumatoid arthritis affecting the left knee joint without rheumatoid factor antibodies.
Coding Tips
- •Confirm seronegative status (negative rheumatoid factor) in the medical record
- •Note any associated symptoms such as pain, stiffness, or reduced range of motion
Clinical Significance
Seronegative rheumatoid arthritis affecting the left knee indicates chronic systemic inflammatory disease requiring specialized care and immunomodulating therapies. This diagnosis supports risk adjustment for patients with ongoing autoimmune conditions and associated healthcare resource utilization.
Documentation Requirements
- ✓Physician documentation of established rheumatoid arthritis diagnosis
- ✓Laboratory confirmation of negative rheumatoid factor (RF)
- ✓Clear specification that left knee is the affected joint
- ✓Clinical evidence of joint inflammation (effusion, synovitis, tenderness)
- ✓Documentation of characteristic RA symptoms and disease activity
- ✓Current treatment regimen with disease-modifying antirheumatic drugs
- ✓Differentiation from other inflammatory or degenerative joint diseases
- ✓Functional assessment and impact on activities of daily living
Commonly Confused Codes
M05.862 — Rheumatoid arthritis WITH rheumatoid factor, left kneeM19.062 — Primary osteoarthritis of left knee (non-inflammatory)M25.562 — Pain in left knee (symptom, not disease process)M13.162 — Monoarthritis, not elsewhere classified, left kneeM06.069 — Rheumatoid arthritis without RF, unspecified knee (less specific)
Code Hierarchy
└M06Other rheumatoid arthritis└M06.0Rheumatoid arthritis without rheumatoid factor└M06.06Rheumatoid arthritis without rheumatoid factor, knee└M06.062Rheumatoid arthritis without rheumatoid factor, left knee
└M06.062Rheumatoid arthritis without rheumatoid factor, left knee