One of the most profitable and hassle free ways for people to make a career and living without the stresses associated with the usual 9 to 5 jobs is taking medical billing careers. A medical coder has many options on where to work and the medical coding training program is often short and straightforward. If you are anticipating to study this course, you have to be ready to take lessons on physiology, anatomy, accounting, bookkeeping and insurance claims as well as billing procedures.