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.

Valeria I. Kozak, MD

  • Pediatrics
Additional Language Spoken
17400 Irvine Blvd., Suite J
Tustin, CA 92780

Primary Office

17400 Irvine Blvd., Suite J
Tustin, CA 92780
Get Directions
(714) 838-0022
(714) 838-0060
Mon - Fri 7:30 a.m. - 5 p.m.

More Information

Medical Groups & Affiliations
  • St. Joseph Hospital Affiliated Physicians
  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Pediatrics
    Education & Training
    • Medical School
      Universidad Del Salvador: Buenos Aires- Buenos Aires, Argentina - 1994
    • Internship
      University of Miami- Miami, FL - 1999
    • Residency
      White Memorial - 2004
    Areas of Interest


  • Biography



    As a pediatrician, my philosophy is to care for my patients the same way that I would care for my own kids. I always put my heart and soul into every encounter with my patients. I love and deeply enjoy my profession and I consider myself blessed for being able to work in a field that makes me feel so complete as a human being.

  • Insurance Accepted

    Insurance Accepted

    Insurance ID Numbers

    Aetna: *307286
    Blue Cross: *0WX148
    Blue Shield: 00A895020
    CIGNA: 644701010
    CIGNA Select: 644701019
    Health Net: 3204131449
    Health Net Senior: n/a
    SCAN: NA
    United Healthcare: *0183470235

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