10 Things Your Patients Should Know About Anemia With an estimated 3 million cases, anemia is the most common blood disorder in the United States. 1 Even so, some of your patients may be unclear about what exactly the condition is and how itâs managed. Here are 10 things about anemia you may want to share with them (or remind them of). 1. Anemia is marked by a deficiency of healthy red blood cells Anemia is a condition in which an individual has too few healthy red blood cells to carry sufficient oxygen to the bodyâs organs. As a result, a person who is anemic may feel exhausted or weak.