M05.A
BillableAbnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritis
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
Rheumatoid arthritis in patients who have abnormal blood test results showing both rheumatoid factor and anti-citrullinated protein antibodies, indicating a more aggressive form of the disease.
Coding Tips
- •This code indicates dual positive serology (both RF and anti-CCP antibodies present)
- •Document which joints are affected as this code may require additional site-specific codes depending on documentation
Code Hierarchy
└M05Rheumatoid arthritis with rheumatoid factor└M05.AAbnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritis
└M05.AAbnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritis