She could give this a shot first:
http://health-care.careerbuilder.com/jobseeker/jobs/jobresults.aspx?argv0=Michigan_Detroit_HealthInfoMgtQA.htm&ArgURL;=/hc.ic/Michigan_Detroit_HealthInfoMgtQA.htm&cbRecursionCnt;=1&cbsid;=9f8d17f7e1ea41fe85070b1e58487153-237575220-RW-4
Here are all of the major healthcare players in Detroit. I know Henry Ford is a great health system to work for, and their employees seem to be quite happy. If she could start out with a good organization, there would be a lot of room for movement.
http://www.guide2detroit.com/health/hospitals.shtml
I haven't heard of Medical Billing Practices sites specific to that area, but the fact that she is multilingual makes her more marketable than the average graduate.
One thing she can do to get some leads, and her foot in the door is to schedule "informational" interviews with key Medical Billing Directors/Managers at the big players in town. She can get on their calendar for a 30 minute, in-person or phone interview, simply to tell them she's relocated to the area and wants to know where to start. This is a great way to network, while she's also looking, shows that she's willing to take initiative and puts her resume at the top of the pile should something open. Those jobs can turn over quickly, so, you never know.