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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 Harris, MD

  • Allergy and Immunology
Additional Language Spoken
Medical Groups & Affiliations
  • St. Joseph Hospital Affiliated Physicians
Allergy Partners of California
505 South Main Street
Suite 250
Orange, CA 92868

Primary Office

Allergy Partners of California
505 South Main Street
Suite 250
Orange, CA 92868
Get Directions
(714) 771-7994
(714) 744-4167

More Information

  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Allergy and Immunology
    Education & Training
    • Medical School
      Northeastern Ohio University College of Medicine - 1987
    • Internship
      UCI Medical Center - 1988
    • Residency
      UCI Medical Center - 1990
    • Fellowship
      UCI Medical Center - 1993
  • Biography


    Dr. Harris made the decision to pursue a career in medicine, specifically allergy and immunology, because he has always been fascinated with science and wanted to help people overcome their health concerns. To do this, he made sure that he had the educational background and up-to-date training to give his patients the best care possible. After earning his medical degree, Dr. Harris completed residency training in internal medicine and fellowship training in allergy and immunology.

    “I see patients who are experiencing chest tightness, shortness of breath, coughing and itchy skin, to name a few, and through comprehensive testing I am able to identify the cause of their symptoms. I then provide them with individualized treatments designed for effective, lasting relief.”

    Dr. Harris prides himself on providing his patients with unhurried and informative care in a relaxed environment. He will take the time to explain their diagnoses and any recommended treatment in simple, easy-to-understand terms.

    “My patients appreciate this level of personalized care; it makes their office visits a positive experience.”