Phlebotomy is the act of piercing the flesh with a needle and entering a vein to extract blood. Sometimes, the blood is used to replace lost blood in another person or for later use in the same person. Most often, the blood is used for diagnostic purposes. A phlebotomist is someone who performs phlebotomy. Phlebotomists have the uncanny ability to find a vein hidden beneath the skin, introduce a needle into the vein, and extract blood with little or no discomfort to the patient. Phlebotomists are vital members of the health care team. Check out the Needle Points page to see a fraction of what every phlebotomist knows.