Diana W. Zhao, MD

New Patients

Diana W. Zhao, MD



  • Hoag Physician Partners


  • English,
  • Mandarin

About Dr. Zhao

Dr. Diana Zhao is an endocrinologist who provides treatment for obesity and weight management, diabetes, as well as other endocrine disorders.

After earning her medical degree at Medical College of Wisconsin, she returned to Southern California to complete an internal medicine residency at LAC + USC Medical Center, followed by a fellowship in Endocrinology at Harbor-UCLA and City of Hope Medical Center. During the COVID-19 pandemic she worked as a hospitalist and served as clinical instructor at the UCLA School of Medicine which greatly broadened her clinical experience.

She sees patients with many types of endocrine disorders and has a clinical interest in obesity medicine. She values every interaction with her patients. Dr. Zhao finds it rewarding when she can educate her patients in a way that they understand. She strives to relieve her patients’ burdens of chronic metabolic diseases with both a shared decision making and an evidence-based approach. Dr. Zhao is excited to have returned to her hometown of Irvine to serve Orange County residents.

Having grown up in China, Dr. Zhao is fluent in Mandarin. During her free time, she enjoys yoga, traveling and spending time with her husband and son.


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National Provider ID (NPI): 1295199768


  • Medical Education - Medical College of Wisconsin (Medicine)
  • Internship - LAC + USC Medical Center (Internal Medicine)
  • Residency - LAC + USC Medical Center (Internal Medicine)
  • Fellowship - Los Angeles County - Harbor UCLA Medical Center (Endocrinology, Diabetes & Metabolism)

Board Certification

  • American Board of Internal Medicine - Internal Medicine
  • Board Eligible -


  • Hoag Physician Partners

Area of Focus

  • Endocrinology