While I applaud your efforts, and I don't mean to rain on your parade, multiple credentials without experience, is still no experience.
Instead of trying to obtain another credential (and still have no experience) check out the job market in your area and ask what the hiring managers might suggest. If they want experience, obtaining another credential is really not going to help you anyway.
Again, I am in no way trying to discourage you. What you might want to do it pick up the phone book and call every doctor's office or medical billing service in your area, and speak to the hiring manager. Explain your situation, have credential, no experience, and ask if they have any positions available. If you let them know you are willing to start low and work your way up, many times people will give you a chance. Yes, you might work thru the whole phone book, but this does work. I actually found two jobs this way when moving to another area. Neither job had even been posted or advertised for yet. Initiative does count!
Best,