The Red Blood Cell (RBC) Count measures the total number of oxygen-carrying red blood cells you have. This number is a fundamental indicator of your health. A low count is a key sign of anemia, while a high count can point to other conditions. This test is a core component of our Complete Blood Count (CBC) Panel. For a truly complete picture, we recommend the full CBC, which analyzes your red cells, white cells, and platelets all in one simple blood draw, offering far greater diagnostic value.