MCHC stands for Mean Corpuscular Hemoglobin Concentration, which is a measurement of the average amount of hemoglobin in a single red blood cell (RBC) as it relates to the size of the cell itself. Hemoglobin is a protein molecule that allows red blood cells to carry oxygen to tissues within the body. The MCHC test is one of the RBC indices, which are a collection of tests that provide information about certain characteristics of RBC like their size, shape, and quality. The MCHC test is usually part of a complete blood count (CBC), which is a common test that analyzes the quality of your blood. The results of MCHC and the other RBC indices are used to diagnose and classify different types of anemia. A low MCHC measurement is known as hypochromia, which indicates that you have a lower concentration of hemoglobin in your red blood cells. A high MCHC (hyperchromia) can mean that there is a higher hemoglobin concentration in red blood cells than usual.