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William C. Shiel, MD

William C. Shiel, MD

(949) 347-6044
Primary Specialties
  • Rheumatology
Medical Groups & Affiliations
  • Mission Heritage Medical Group
  • Additional Languages Spoken

Primary Office

26732 Crown Valley Pkwy.
Suite 151
Mission Viejo, CA 92691
(949) 347-6044
(949) 347-6069
Web Page:
Recommend this Physician Request an Update for this Physician
5 out of 5 (121 Ratings | 23 Comments)


I feel very blessed to have such a caring doctor who listens and spends quality time with his patients.
Always concerned, friendly, interested, helpful, patient.
*Dr. Shiel looks beyond the current situation to help find answers to other problems.
They don't come any better than doctor Shiel. I started seeing him maybe 10 years ago. He is the only doctor of about a dozen who stuck with it and finally found out what was wrong. He is amazing.
*Dr. Shiel is very kind, attentive and the best dr. I've ever had!!
23 Total Comments Page 1 2 3 4 5   Next

Physician Bio

Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology. He is a Fellow of the American Colleges of Physicians and Rheumatology.

Dr. Shiel is in active practice in the field of rheumatology in south Orange County, California with the Mission Heritage Medical Group. He has served as a teaching Associate Clinical Professor of Medicine at University of California, Irvine. He has also been chairman of the Department of Internal Medicine at Mission Hospital Regional Medical Center. He was selected as one of the most respected doctors in Orange County California in a poll of more than 5,000 physicians in the county performed by the Washington D.C. based Center for the Study of Services as published in Orange Coast magazine.

Dr. Shiel has authored and served as a reviewer for numerous articles on subjects related to arthritis for prestigious peer-reviewed medical journals and has published clinical rheumatology research. He has co-edited three medical textbooks. He is Co-Editor-In-Chief of three editions of the Webster's New World™ Medical Dictionary.

He has lectured in person and appeared on television and radio programs both for physicians and the local community. He was a medical commentator for the national news broadcast of medical issues related to the death of Pope John Paul II, Fox News NYC, April, 2005. He has authored numerous expert medical-legal reviews. He is a contributor for questions for the American Board of Internal Medicine. He is a regular reviewer of board questions on behalf of the American Board of Rheumatology Subspecialty. He served on the Medical and Scientific Committee of the Arthritis Foundation and the Medical Advisory Board of Lupus International.

Dr. Shiel is Chief Editor and co-founder of the medical information website, He has authored hundreds of articles for the website, now a subsidiary of WebMD. He is the editor of a popular book for mothers of twins, Twinthusiasm .


  • Medical School:
    St. Louis University- School of Medicine - St. Louis
  • Internship:
    Veterans Administration Medical Center
  • Internship:
    Long Beach University of California
  • Internship:
    Irvine Medical Center - Irvine
  • Residency:
    Veterans Administration Medical Center , California
  • Residency:
    Long Beach University of California , California
  • Residency:
    Irvine Medical Center - Irvine, California
  • Fellowship:
    University of California- Irvine Medical Center - Irvine, California - 1984
  • Fellowship:
    Veterans Administration Medical Center - Long Beach, California - 1984


Fellow, American College of Physicians and Rheumatology
Associate Clinical Professor of Medicine, University of California, Irvine
Dr. Tom Dooley Society, University of Notre Dame Charter Member; Pre-Professional Studies Mentor 2005- present


Ranked as A Top Physician Orange County, California by Orange Coast Magazine, 2002 American Medical Association Physician's Recognition Award, 1985 American College of Physicians - Southern California Chapter, 1985 Research Award - Second Place First Place Winner, Annual Research Competition for Fellows: University of California Irvine, Long Beach VA Medical Center, Long Beach Memorial Medical Center

Areas of Interest

Board Certified Rheumatology, 1982

Board Certified Internal Medicine, 1980