What is Medical Assistant certification? How long it take? what is the scope of it and how much can I earn? Is it really difficult course work and requires lot of time? Do I need it to get a job in this field?

I am living in california, USA and i have master's degree in psychology. Looking for a job in healthcare. I am looking for any type of job from case manager to administrative not necessarily have to be psychology related. I have personal experience in medical case management. I want to use my personal experience in helping others.Currently an unpaid intern at Make a Wish Foundation in volunteer services department. Looking for a job with good helath benefits. #psychology #healthcare #medicare #medical-assisting