This infographic from Phlebotomy Training Group provides an overview of what a career in phlebotomy would entail. Phlebotomy is a great way to enter the medical field. It takes only 2 to 4 months to finish the basic training and the training cost is minimal. The demand for phlebotomists is rising and it is one of the highest paid entry-level health care jobs. The main duty of a phlebotomist is to obtain blood samples for the purpose of laboratory testing.