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.
Medical Appliance Technician Salary. Medical Appliance Technician average salary is $43,004, median salary is $41,642 with a salary range from $23,171 to $68,869. Medical Appliance Technician salaries are collected from government agencies and companies.