| Risk | Stage | Description |
| Low | 0 | Lymphocytosis in blood or bone marrow |
| Intermediate | I | Lymphocytosis + enlarged lymph nodes |
| II | Lymphocytosis + enlarged liver or spleen with or without lymphadenopathy | |
| High | III | Lymphocytosis + anemia (Hgb <11 g/dL) with or without enlarged liver, spleen, or lymph nodes |
| IV | Lymphocytosis + thrombocytopenia (platelet count <100,000/microL) with or without anemia or enlarged liver, spleen, or lymph nodes |
