Why Get Tested?
To determine the proportion of your blood that is made up of red blood cells (RBCs), thus to screen for, help diagnose, or monitor conditions that affect RBCs; as part of a routine health examination or if your doctor suspects that you have anemia or polycythemia
When to Get Tested?
With a test for hemoglobin and hematocrit, or as part of a complete blood count (CBC) during a routine health exam or when your doctor suspects you have a condition such as anemia (low hematocrit) or polycythemia (high hematocrit); at regular intervals to monitor a disorder that affects RBCs and to evaluate treatment effectiveness
A blood sample drawn from a vein in your arm.
Test Preparation Needed?