Careers With St. Joseph Health

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They form the heart and soul of St. Joseph Health and are the prime reason we attract and retain high-caliber employees who believe in the sanctity of their work in our faith-based setting.

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About St. Joseph Health

SJH provides a full range of care facilities including 16 acute care hospitals, home health agencies, hospice care, outpatient services, skilled nursing facilities, community clinics and physician groups. All of our hospital and home health entities are accredited by the Joint Commission. In our award-winning facilities, SJH maintains a "continuum of care," matched to the diverse needs of the urban centers, smaller cities and rural communities who depend on us every day.

William C. Shiel, MD

5 out of 5 (92 Ratings)
  • Rheumatology
    (Board Certified)
Additional Language Spoken
Mission Heritage Medical Group
26732 Crown Valley Pkwy.
Suite 151
Mission Viejo, CA 92691

Primary Office

Mission Heritage Medical Group
26732 Crown Valley Pkwy.
Suite 151
Mission Viejo, CA 92691
Get Directions
(949) 347-6044
(949) 347-6069

More Information

Medical Groups & Affiliations
  • Mission Heritage Medical Group
  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Rheumatology
      (Board Certified)
    Education & Training
    • Medical School
      St. Louis University- School of Medicine- St. Louis, MO
    • Internship
      Irvine Medical Center- Irvine, CA
    • Residency
      Irvine Medical Center- Irvine, CA
    • Fellowship
      University of California- Irvine Medical Center- Irvine, California - 1984
    • Fellowship
      Veterans Administration Medical Center- Long Beach, California - 1984
    • Board Certification
    • Board Certification
      Internal Medicine
  • Biography



    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 .

    Board Certified Internal Medicine, 1980
    Board Certified Rheumatology, 1982
    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
  • 8-May-2018
    *Dr. Shiel is the only dr. I have that genuinely seems concerned with my health. I wish he was my primary internist.
    always great!
    *Dr. Shiel is wonderful!
    Dr Shiel is an excellent care provider!
    Dr. Shiel is one of the finest doctors I have ever had for any problem. He explains things, takes his time and is so caring. I would highly recommend him to anyone. I feel well taken care of after a visit with him.
    14 Total Comments Page 1 2 3   Next