response: Medical bills are not required by law to take any exams or anything like that.
history: Medical bills can really destory a family financially. I know that Medical billings is a payment practice in the USA. It is, and sometimes there is no help available to people who struggle the most.
knowledge: Medical billers are encouraged, but not required by law, to become certified by taking an exam such as the CMRS Exam, RHIA Exam and others.