Since you didn't ask us to provide his contact information, but merely
how to find it yourself, my understanding is that this is a legitimate
question that researchers can answer.
Since he graduated from a US medical school, he will be listed in the
American Medical Association physician's directory. As a public
service, there is an AMA search engine for people wanting to look up a
physician at < http://www.ama-assn.org/aps/amahg.htm > Choose the
Patients and Consumers "Search for a Physician" option.
The search by name for a physician does require inputting a state. If
you don't know the state he lives in, you may have to go through them
all, but you will find him.
Note that you can click on the name in the search results and access
basic information, including where and when the doctor graduated, so
you can ascertain that the result is, indeed, who you are looking for.
By the way, if you are trying to find someone simply using Google, you
will have more luck by putting the name in quotation marks: "William
R. Fielder", rather than using william r fielder - the quotation marks
tell Google to search for that complete phrase, rather than 3 separate
terms. Also, use capitalization and punctuation as you are trying to
find a name. (Otherwise you will end up with search results like 'Ted
Williams was a great left fielder')
Thanks for using Google answers!