Along with these tests, the RBC count can not only help diagnose disorders that cause too many or too few red blood cells but also offer clues as to what may be causing the problem.

An RBC count is used to find out how many red blood cells you have. Learn why your doctor might order one, how it’s performed, and what results mean.

RBC indices such as mean corpuscular volume, mean corpuscular hemoglobin concentration, ... inherited RBC disorders, or as a response to drugs or other toxins: Howell-Jolly Bodies ...