Yep!! It’s basically a class where you learn medical terminology to help as an admin, and with “billing and coding” thrown in there as well, you have a certificate stating you know how to bill insurances and people and how to code the charges. You can get trained on the job for this but you won’t get a cert and you won’t make as much $$
I think because OP has admin experience already, b&c would be more attainable. Demand typically depends on where you live— bigger cities it will be more competitive for sure but smaller cities and rural areas (based on other healthcare stats I know of) it would be a bit less competitive. But starting as an admin and working up to b&c being “promoted” from within is the route I usually suggest because I’ve seen it work for others!!