Careers With St. Joseph Health

Our Values are more than just words.

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.

Recent News

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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.

Jonathan Ou, MD

4.9 out of 5 (46 Ratings)
  • Internal Medicine
    (Board Certified)
Additional Language Spoken
Cantonese, Chinese, Spanish
Medical Groups & Affiliations
  • St. Jude Affiliated Physician
2707 S. Diamond Bar Blvd.
Suite 104
Diamond Bar, CA 91765

Primary Office

2707 S. Diamond Bar Blvd.
Suite 104
Diamond Bar, CA 91765
Get Directions
(909) 594-8331
(909) 869-6631

More Information

  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Internal Medicine
      (Board Certified)
    Secondary Specialties
    • Pediatrics
      (Board Certified)
    Education & Training
    • Medical School
      Keck USC School of Medicine- Los Angeles, CA
    • Internship
      Loma Linda University- Loma Linda, CA
    • Residency
      Loma Linda University- Loma Linda, CA
  • Biography



    As an Internal Medicine and Pediatrics physician, I believe the best foundation of good health care is evidence-based practice, continuity of care, and patient empathy. Maintaing good relations with colleagues is also of vital importance, thus emphasizing the need for frequent and clear communication.

  • Insurance Accepted

    Insurance Accepted

    Insurance ID Numbers

    Aetna: *691732
    Blue Cross: *0DL213
    Blue Shield: 00A1131760
    CIGNA: 8982226004
    CIGNA Select: 8982226006
    Health Net: 3206195883
    Health Net Senior: n/a
    SCAN: n/a
    United Healthcare: *0183440070

    *Provider ID is the same for both HMO and Medicare Advantage Plans

  • 6-Sep-2018
    Great dr.
    *Dr. Ou continues to go above and beyond as my provider. He always has my best interest at the forefront of his decisions when it comes to my health.
    4 Total Comments