School of Medicine


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  • Ricky Y. Choi, MD, MPH

    Ricky Y. Choi, MD, MPH

    Clinical Assistant Professor, Pediatrics - General Pediatrics

    BioRicky Y. Choi, MD, MPH is Clinical Assistant Professor at the Stanford University School of Medicine in the Division of General Pediatrics where he attends on the newborn nursery service and in outpatient clinic. He also leads digital health initiatives for the Division. In the past he has served in a number of clinical leadership positions including as the Department Head of Pediatrics at Asian Health Services Community Health Center in Oakland, CA. He has held multiple national physician leadership roles for many years including the Board of Directors for the National Physicians Alliance and as the founding Chair of the Immigrant Child Health Group of the American Academy of Pediatrics. He is a past Fellow of the California HealthCare Foundation Health Care Leadership Program.

    In addition to his clinical work, Dr. Choi serves as the Head of Digital Health at Samsung Electronics America where he leads virtual care, strategy and strategic partnerships. Initially based out of Samsung's headquarters in South Korea and now in the Bay Area, Dr. Choi's expertise is in delivering improved clinical and financial outcomes by using consumer technologies to drive health engagement.

  • William Choi, D.M.D.

    William Choi, D.M.D.

    Clinical Associate Professor, Surgery - Plastic & Reconstructive Surgery

    BioClinical focus in Hospital Dentistry serving as needed for hospital inpatients, dental oncology, adults with disability and emergency room patients who need dental consultation or treatment.

  • Curtis R. Chong, MD, PhD, MPhil, FACP

    Curtis R. Chong, MD, PhD, MPhil, FACP

    Clinical Assistant Professor, Medicine - Oncology

    BioDr. Chong was recruited to Stanford from the Memorial Sloan Kettering (MSK) Cancer Center, where he led MSK's launch of the early drug development and immunotherapy clinical trials program in New Jersey. At MSK, Dr. Chong was a member of the gastrointestinal oncology service and was one of two MSK physicians in New Jersey who specialized in treating melanoma. Prior to joining MSK, Dr. Chong was a member of the thoracic oncology service at the Dana-Farber Cancer Institute and an attending physician at the Massachusetts General Hospital and Brigham and Women's Hospital, all ailiates of Harvard Medical School.

    Dr. Chong completed his categorical residency in internal medicine at the Massachusetts General Hospital/Harvard Medical School, his oncology fellowship at the Dana-Farber Cancer Institute, and is board-certified in internal medicine and medical oncology. He has received research support from the American Society of Clinical Oncology (Young Investigator Award), Uniting Against Lung Cancer, and the American Cancer Society. Dr. Chong has been published in the New England Journal of Medicine, Nature, Nature Medicine, Nature Chemical Biology, JAMA Oncology, and his research on drug discovery has been featured in the New York Times and Popular Science.

    Born and raised in Honolulu where he attended public schools, Dr. Chong sang in the Honolulu Boy Choir, and was the 1993 Honolulu Star Bulletin Newspaper Boy of the Year. He received his A.B. in biochemical sciences from Harvard University magna cum laude followed by an M.Phil. in Chemistry with Sir Alan Fersht at the University of Cambridge (Emmanuel College). He then received his MD and PhD in pharmacology from The Johns Hopkins University School of Medicine.

    An intrepid traveler and avid long-distance runner, Dr. Chong has visited 54 countries and completed 126 marathons in all 50 states, 18 countries, and 6 on continents.

  • HyeRan Choo

    HyeRan Choo

    Clinical Associate Professor, Surgery - Plastic & Reconstructive Surgery

    BioDr. HyeRan Choo is a Clinical Associate Professor and Section Chief of Craniofacial Airway Orthodontics in the Department of Surgery, Division of Plastic and Reconstructive Surgery at Stanford University School of Medicine. She also serves as the Director of the Stanford Orthodontic Airway Plate Treatment Program for Pierre Robin Sequence (SOAP for PRS) at Lucile Packard Children’s Hospital Stanford and is a faculty fellow at the Stanford Mussallem Center for Biodesign.

    Dr. Choo earned her dental degrees from Seoul National University (combined Undergraduate and Graduate Dental Surgery program) and The University of Pennsylvania (Dental Medicine program). She completed her Post-graduate Orthodontic Residency and Master of Science degree at The University of Alabama in Birmingham. After a Craniofacial Fellowship at the National Institutes of Health / National Institute of Dental and Craniofacial Research, Dr. Choo served as Director of Craniofacial Orthodontics at The Children’s Hospital of Philadelphia / The University of Pennsylvania.

    In 2012, Dr. Choo relocated to the San Francisco Bay Area, where she became a craniofacial orthodontic provider for Kaiser Permanente Medical Centers in Oakland and Santa Clara. She joined the Stanford University faculty in 2016 as a part-time craniofacial orthodontist and clinical instructor and transitioned to a full-time position in 2019 as a craniofacial airway orthodontist and clinical assistant professor.

    Her clinical expertise includes surgical and non-surgical craniofacial and airway orthodontic treatments for neonates, infants, and children with craniofacial dysmorphism and/or orofacial dysfunctions. Dr. Choo's treatment philosophy centers on providing minimally invasive yet highly effective treatments, grounded in a deep understanding of craniofacial growth and function. Her SOAP for PRS program is the first in the nation to non-surgically treat neonates with PRS using OAP, which she fabricates based on her innovative method of analyzing maxillomandibular computed tomography.

  • Mehak Chopra

    Mehak Chopra

    Clinical Assistant Professor, Psychiatry and Behavioral Sciences

    BioHer expertise lies in treating special populations such as athletes and students. She has also had training in dealing with cultural psychiatry issues. She has been trained to treat students with a variety of mental health issues – ADHD, Bipolar disorder, schizophrenia, eating disorders, insomnia, mood disorder and personality disorders.

  • Danny Hung-Chieh Chou

    Danny Hung-Chieh Chou

    Associate Professor of Pediatrics (Endocrinology) and, by courtesy, of Chemical and Systems Biology

    Current Research and Scholarly InterestsOur research program integrates concepts of chemical biology, protein engineering and structure biology to design new therapeutic leads and generate probes to study biological processes. A key focus of our lab is insulin, an essential hormone in our body to reduce blood glucose levels. We generate synthetic libraries of insulin analogs to select for chemical probes, and investigate natural insulin molecules (e.g. from the venom of fish-hunting cone snails!) to develop novel therapeutic candidates. We are especially interested in using chemical and enzymatic synthesis to create novel chemical entities with enhanced properties, and leverage the strong expertise of our collaborators to apply our skill sets in the fields of cancer biology, immunology and pain research. Our ultimate goal is to translate our discovery into therapeutic interventions in human diseases.

  • Loretta Chou, MD

    Loretta Chou, MD

    Professor of Orthopaedic Surgery, Emerita

    Current Research and Scholarly InterestsI am a Board Certified Orthopaedic Surgeon, subspecializing in Disorders of the Foot and Ankle. My clinic offers diagnosis and treatment of deformities and acute injuries of the foot and ankle.


    My research interests include: rupture and tendinitis of the Achilles tendon, osteochondral defects of the talus, Total Ankle Arthroplasty, arthrodesis (fusion) of the foot and ankle, open fractures treated with operations, and anatomy of the foot and ankle.

  • Raymond Chou, MD

    Raymond Chou, MD

    Clinical Assistant Professor, Orthopaedic Surgery

    BioDr. Chou is a physical medicine and rehabilitation specialist. He is a clinical assistant professor in the Department of Orthopaedic Surgery, Division of Physical Medicine & Rehabilitation at Stanford University School of Medicine.

    He provides expert care for patients who require non-operative treatment for musculoskeletal and neurologic conditions, with additional specialized expertise with conditions affecting the hand and upper extremity. For each patient, he develops a personalized, comprehensive, and compassionate care plan designed to achieve the best possible health and quality of life.

    Among the conditions he manages are repetitive strain injury (RSI), rotator cuff disease, frozen shoulder, and tennis and golfer's elbow. He excels at the use of ultrasound for diagnosis and evaluation. He also uses ultrasound to precisely guide treatments delivered with injections and nerve blocks.

    Dr. Chou’s expertise includes electromyography (EMG) and extracorporeal shockwave therapy (ESWT). He has conducted research into the effects of electrical stimulation to improve upper extremity neurologic function in cervical spinal cord injury patients. He leads the pioneering Stanford Gaming and Tech Injury Medicine Program, dedicated to the diagnosis, treatment, and research of musculoskeletal and neurological conditions that develop from prolonged interaction with electronic devices. His research focus revolves around neuromodulation and other non-operative treatments for dynamic compressive neuropathies.

    He has published the findings of his research in Physical Medicine & Rehabilitation, Spinal Cord, and other journals. He has co-authored chapters in the textbooks Handbook of Clinical Neurology and Basics of Musculoskeletal Ultrasound.

    Dr. Chou has addressed his peers in presentations at meetings of the American Academy of Physical Medicine and Rehabilitation and the Association of Academic Physiatrists. Topics include extracorporeal shockwave therapy, dynamic compressive neuropathies, and rock-climbing injuries.

    He has earned honors from Harvard Medical School/Spaulding Rehabilitation Hospital and Northwestern University. He is a member of the American Academy of Physical Medicine & Rehabilitation and Association of Academic Physiatrists. Additionally, Dr. Chou founded the International Society of Hand and Upper Extremity Physiatrists, an organization dedicated to advancing innovation, education, and research of non-operative approaches to the treatment of hand and upper extremity conditions.

    Dr. Chou volunteers his time and expertise to help the members of his community optimize their musculoskeletal health.