Received numerous calls. They will ask for your DOB and if you refuse to provide it like I did, they will ask for your house address (number only). Person would not disclose organization they are with. I asked what the matter is concerning and person could not disclose. Rep. said I could call back the # on caller ID. She was at least a nice person to deal with. So, I came here and saw it might be related to Aurora Healthcare Billing. Logged into my actual Aurora account and discovered in the details section a drop in payment amount due. So, calls from this # are legitimate and you should answer the phone and work with them to determine your options. Thankfully, my amount owed was small, but Aurora Billing never tried to contact me to get payment and did not mail any communication/statement that they were sending this small debt to collections. If you use Aurora, pay close attention to your accounts online for billing so you can ensure this doesn't happen to you.