Online CMA course?

So I’m looking to do CMA for clinical face-to-face hours for med school and I know I need certification to be a CMA. My local community college offers classes but I am a full time undergraduate student and so I can’t do that 12 credit course on top of the 17 credits I am already doing for my bachelors. Are there any reputable and legitimate online CMA course anyone could recommend? Preferably something self paced that I can get done quickly, something that won’t take like a year to complete?