What is considered a normal range for an MCV test can vary between different clinics or hospitals and different regions of the United States. An MCV test score of 80 to 100 femtoliter is reported by the Aplastic Anemia and MDS International Foundation to be the adult normal range.
MCV, or mean corpuscular volume, is a measure of the average size of red blood cells. An MCV measurement that is higher or lower than normal is an indicator of potential health problems. A low MCV result, for instance, can be an indicator of iron deficiency anemia, or thalassimias (defined by the National Heart, Lung, and Blood Institute as inherited anemias). A high MCV result, on the other hand, can indicate anemia caused by a vitamin B12 or folate deficiency, reports the American Association of Clinical Chemists.