CPT® Code 85013

The CPT® Code 85013 refers to a specific blood test known as the spun microhematocrit. This procedure is designed to measure the hematocrit (Hct), which is the proportion of red blood cells (erythrocytes) in a given volume of blood. The hematocrit is typically expressed as a percentage of the total blood volume, which includes red blood cells, white blood cells (WBCs), and plasma. To perform this test, a blood sample is collected, which can be obtained through various methods such as venipuncture or a finger, heel, or ear stick. The collected blood sample is placed in a microhematocrit tube and then subjected to centrifugation, a process that spins the tube at high speeds to effectively separate the components of the blood. Following this separation, the volume of red blood cells is calculated and reported as a percentage of the total blood volume. This method of determining hematocrit is distinct from the electronic cell counter method described in CPT® Code 85014, which calculates hematocrit using automated technology.