When considering an oncology clinic or professional, it's a good idea to do some homework online to see what kind of Internet presence they have. A good website can provide you with everything from contact information to in-depth bios of key personnel.
The Internet is a often a good place to find out what other people think about a particular oncology professional. Some sites even include reviews of their service, where you can get important information directly from people who have had treatment at the hands of that oncologist.