Hey I don't think they are collectors simply because I don't have a debt and the department they claim to be part of is definitely wrong plus the fact that they don't provide information of who they are (like a last name who calls and not provide a last name!). Either way they called me twice and asked for info when I declared that I wasn't comfortable the guy had the audacity to say that its on Facebook and that it makes not difference! WTF then get it from Facebook! then he hung up, after rudely stating that i need to call him when i am willing to cooperate. i got a call couple of month later the lady on the phone hung up as soon as i told her that I will not give info and that I have received a similar call and the guy was rude. Now we all know that if this was a company first thing i would have received would have been an apology. Plus u have stated that it was a debt collector for Shenandoah Emergency Physicians. That's too broad of a name look them up on Google they don't exist! Plus They gave me a different hospital name, that i have no association with! the point is THIS IS FRAUD!!
You don't need a valid debt or a derogatory trade line on your credit reports to be hassled by debt collectors. They call third parties to alleged debtors all the time for permitted skip tracing purposes, or often pretending it's a trace to annoy and shame an intended target whose location is already known. The worst of the industry, often collecting on junk paper from debt buyers, frequently work from corrupt and outdated files. Yet they press on with accusations and trickery until someone, anyone pays.
If you are this collector's target, you should be getting a dunning letter within a few days, required by federal law. To this you can respond with a dispute letter which may also set limits on how and when you can be contacted.
Official-type material on US federal collection law:
http://www.ftc.gov/os/statutes/fdcpajump.shtm
http://www.consumerfinance.gov/askcfpb/search ... debt-collection