American Board of Clinical Neuropsychology
http://www.theabcn.org
American Board of Medical Specialties
http://www.abms.org
American Medical Association Physician Finder
http://www.ama-assn.org/aps/amahg.htm
American Society of Clinical Oncology
Find an Oncologist
Neurosurgeon Finder
http://www.neurosurgerytoday.org/findaneuro
National Library of Medicine - National Institutes of Health: Find a Doctor
http://www.nlm.nih.gov/medlineplus/directories.html
