It's not a prefix in the context in which you're using it. It's merely spelling a word incorrectly based on how some people say it. It has zero semantic value. It is completely unrelated to the prefix a which just means without.
For example the median expected annual pay for a typical Medical Records Technician in the United States is $32,140 so 50% of the people who perform the job of Medical Records Technician in the United States are expected to make less than $32,140.
In the United States, registered health information technicians earn an average salary of $33,880 as of May 2009, according to the Bureau of Labor Statistics.ost health information technicians are employed in medical facilities, though no hands-on patient care is required. Hospitals and the offices of physicians are the two largest employers of registered health information technicians, offering average salaries of $35,870 and $28,460, respectively.