There is no one specific test that can diagnose lupus. Diagnosis is based on several tests and excluding other conditions. Blood tests commonly included in a lupus panel include:  Complete blood count (CBC) Antinuclear antibodies (ANA) and other antibody tests Blood clotting time tests including prothrombin time (PT)and partial thromboplastin time (PRR)  Rheumatoid arthritis factor (RF) Erythrocyte sedimentation rate (ESR) C-reactive protein (CRP)