Caller ID read "PROSCAN INTRNTL." I Googled them and they are legit. They are a medical imaging company and set up an MRI for my mother.  Here's what their website says:

Headquartered in Cincinnati, Ohio, the ProScan Family of Companies is committed to providing healthcare professionals and their patients with exceptional medical imaging services. Our team of highly trained radiologists, technologists, IT and research specialists, educators, and support staff is fully committed to excellence in customer service and the clinical interpretation of MRI, CT, ultrasound, mammography, and X-ray images.