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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.

Paul C. Sun, MD

  • Otolaryngology
Additional Language Spoken
Chinese - Mandarin, English
Medical Groups & Affiliations
  • Hoag Affiliated Physicians
  • Mission Hospital Affiliated Physicians
  • Nose & Throat Assoc.
  • O.C. Ear
Orange County Ear, Nose & Throat - Laguna Hills
24411 Health Center Drive
Suite 600
Laguna Hills, CA 92653
Accepting New Patients

Primary Office

Orange County Ear, Nose & Throat - Laguna Hills
24411 Health Center Drive
Suite 600
Laguna Hills, CA 92653
Get Directions
(949) 305-8000
(949) 305-8001
Mon- Fri 9 a.m.-5 p.m.

More Information

  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Otolaryngology
    Education & Training
    • Medical School
      Washington University- School of Medicine
    • Internship
      Barnes Hospital
    • Residency
      Barnes Hospital
    • Fellowship
      Lineberger Cancer Center - 2003
    Areas of Interest


  • Biography


    Dr. Paul Sun graduated from Dartmouth College with Honors in Biochemistry. He then obtained his medical degree (MD) from Washington University in St. Louis. During medical school, he also received a masters degree (MA) in molecular biology. He then completed his residency in the Department of Otolaryngology at Washington University in St. Louis, MO. Dr. Sun's field of interest during his residency training was in head and neck cancer.

    During residency, he conducted basic science research in the genetics of head and neck cancer. He served as chief resident during his final year in training and was awarded Best Teacher by his peers. After residency, he joined the Department of Otolaryngology at the University of the North Carolina and the Lindberger Cancer Institute to continue his research in head and neck cancer.

    At that time, he shifted his focus in studying the mechanism of head and neck cancer progression. During his research career, he was awarded competitive grants from the National Institutes of Health to fund his projects and was recognized with numerous institutional and national awards. Following his tenure at the University of North Carolina, he decided to dedicate his career exclusively to patient care. He and his family moved from North Carolina to join his brother Dr. John Sun and Dr. Yian in Southern California, in 2003.

    Dr. Paul Sun is board certified in Otolaryngology-Head and Neck Surgery. He is a member of numerous professional organizations, including the American Medical Association, the California Medical Association, and American Academy of Otolaryngology-Head and Neck Surgery. Dr. Paul Sun has been elected by his peers for inclusion in Best Doctors in America for 2017-2018. The prestigious recognition marks the fifth time that he has earned this honor. Dr. Paul Sun has also been selected by his peers for inclusion in Castle Connolly Top Doctors 2017-2018.

    Dr. Paul Sun was born in Taipei, Taiwan and grew up in the San Fernando Valley. His primary language is English, however, he is also fluent in Mandarin. Dr. Paul Sun is married with two daughters and a son. In his free time, he enjoys coaching his children in sports and spending quality time with his family.
    American Board of Otolaryngology