About
Dr. Jinsun Choi, MD, is a board-certified endocrinologist with over 15 years of experience in Orange County, California. She earned her medical degree from the University of California, Irvine, School of Medicine. Her residency in internal medicine took place at Cedars-Sinai Medical Center. She then completed a fellowship in endocrinology, diabetes, and metabolism at Harbor-UCLA Medical Center and City of Hope.
Dr. Choi holds dual board certifications from the American Board of Internal Medicine in endocrinology and from the American Board of Obesity Medicine. She is passionate about diabetes care, thyroid disease, osteoporosis, menopause, PCOS, and hormone imbalances. C. to build meaningful, trust-based relationships with her patients and to offer a personal solution to complex endocrine conditions. Dr. Choi maintains an affiliation with Hoag Hospital and holds membership in the Endocrine Society and the American Association of Clinical Endocrinologists. She is fluent in English, Spanish, and Korean, and she sees patients in person and via telehealth.
Education & Training
Medical School
University of California, Irvine, School of Medicine
Residency
Internal Medicine, Cedars-Sinai Medical Center
Fellowship
Endocrinology, Diabetes, and Metabolism, Harbor-UCLA Medical Center and City of Hope
Certifications
Languages
English, Spanish, Korean
Conditions Treated
Who is Dr. Choi right for?
Dr. Choi is a strong fit for adults managing diabetes, whether Type 1 or Type 2, who want direct, consistent access to a specialist. Patients navigating thyroid conditions, PCOS, osteoporosis, or unexplained hormonal symptoms benefit from her thorough diagnostic approach. She also works well with patients focused on medically supervised weight management through her PDW Program. Spanish- and Korean-speaking patients find her trilingual fluency particularly valuable. Those who prefer seeing the same specialist doctor at every visit, with no hand-offs to mid-level providers, will feel at home in her practice.
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Frequently Asked Questions
Dr. Choi treats a broad range of endocrine conditions. Her clinical focus includes Type 1 and Type 2 diabetes, thyroid disease, osteoporosis, obesity, menopause, male hypogonadism, parathyroid disease, PCOS, insulin resistance, and hormone imbalances. She also addresses unexplained fatigue that may have a hormonal root cause.
Yes. Dr. Choi holds board certifications in both endocrinology, through the American Board of Internal Medicine, and obesity medicine, through the American Board of Obesity Medicine. These dual certifications reflect her expertise in both hormonal health and medically supervised weight care.
Dr. Choi earned her medical degree from the University of California, Irvine, School of Medicine. She completed her internal medicine residency at Cedars-Sinai Medical Center. Her fellowship in endocrinology, diabetes, and metabolism took place at Harbor-UCLA Medical Center and City of Hope.
Yes. Dr. Choi is board-certified in obesity medicine and offers her PDW Program, a six-month intensive focused on personalized diabetes and weight-loss management. The program includes bi-weekly follow-up visits, CGM reviews, and direct doctor access throughout.
Dr. Choi is fluent in English, Spanish, and Korean. Patients who prefer to discuss their health in Spanish or Korean can do so comfortably at every visit.
C. is with Dr. Choi directly. The practice does not use nurse practitioners or physician assistants for patient visits. Patients see the same specialist every time.
Yes. Dr. Choi offers telehealth visits for follow-up appointments. Patients can choose in-person or telehealth for their follow-up visits, making specialist access more flexible.
Dr. Choi prioritizes building genuine, long-term relationships with each patient. She takes time to understand a patient's full health picture before developing a treatment plan. C. specifically to practice with this level of personal attention and discernment.
Dr. Choi maintains an affiliation with Hoag Hospital in Orange County. She also previously practiced at Kaiser Permanente in Orange County, giving her broad experience across different care settings.
Doctor profile last updated August 17, 2026