Treatment A high hematocrit test result may indicate a blood disorder or other medical condition Hematocrit tests are part of a complete blood count test and measure the percentage of red blood cells in your blood.

Hematocrit tests are part of a complete blood count test and measure the percentage of red blood cells in your blood. To obtain a complete picture of your health, your hematocrit levels are usually attributed to your red blood cell count, platelet count, and other components of your complete blood count.