School of Medicine


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  • Nichole Tyson MD

    Nichole Tyson MD

    Clinical Associate Professor, Obstetrics & Gynecology - General

    Bio Nichole Tyson MD is a Clinical Associate Professor of Obstetrics and Gynecology at Stanford University School of Medicine. She specializes in Pediatric and Adolescent Gynecology (PAG). Dr. Tyson was an OB/GYN, the Chair of Pediatric and Adolescent Gynecology at Kaiser Permanente, Northern California and founder of the Kaiser OB/GYN Teen clinic in 1999. As a Pediatric and Adolescent Gynecologist, she specializes in problems ranging from abnormal menstrual bleeding, abnormal puberty (too early, or too late), adolescent contraception, vulvar and vaginal symptoms, pelvic/ovarian masses, pelvic pain, differences of sex development, concerns about sexually transmitted infections, congenital utero-vaginal variants, and much more. For over 20 years, Dr. Tyson has partnered with girls and their families as they journey from childhood through adolescence and into adulthood. Dr. Tyson enjoys solving complex problems as well as common concerns that can be overlooked and challenging to girls and young women. She is an advocate for empowering young patients locally and nationally.
    She has been active on a number of national medical committees, including chair of the North American Society of Pediatric and Adolescent Gynecology (NASPAG) Education committee, Advocacy committee, Board of Directors, a former member of ACOGs Adolescent committee and a long-standing member of ACOGs LARC work group. She is an active contributor to the peer reviewed literature in adolescent gynecology. Dr. Tyson also has extensive experience with the consumer press as an adolescent gynecology expert for numerous online articles in such magazines as Seventeen, Self and NY Times. She has been recognized for her teaching having won the UC Davis residency teaching award numerous times and locally recognized as winning Sacramento Magazine top doctor several times.
    Dr. Tyson is a fan of using technology to advance the field having been faculty for an advanced laparoscopic surgery course (ligocourses.com), creating and presenting ACOG emodules and webinars as well as numerous interactive e-modules, videos and resources for contraception counseling at Kaiser. She has been a telehealth pioneer and created and co-hosts the podcast for the Journal of Pediatric and Adolescent Gynecology.

  • Amy Voedisch

    Amy Voedisch

    Clinical Assistant Professor, Obstetrics & Gynecology - General

    Bio Dr. Voedisch was born and raised in a small town in Minnesota. She received a BA from Macalester College and attended Mayo Medical School. She completed a residency in Obstetrics and Gynecology at Kaiser Permanent Santa Clara and a Fellowship in Family Planning at Stanford School of Medicine. She also has a Masters in Epidemiology and Clinical Science Research from Stanford University. Dr. Voedisch is passionate about providing comprehensive reproductive healthcare to all women at any stage in their lives. She specializes in contraception, family planning, early pregnancy management and menopause. Dr. Voedisch has a particular interest in international healthcare and serves as a consultant through the Stanford Program for International Reproductive Education and Services (SPIRES), providing medical education and quality assurance in family planning internationally. She also is a member of the Bay Area Leadership Council for the International Women's Health Coalition. Dr. Voedisch believes strongly in shared-decision making between patients and their physicians in order to help all patients reach their health goals.

  • John Wachtel

    John Wachtel

    Clinical Professor, Obstetrics & Gynecology - General

    Bio Dr. Wachtel has been practicing general obstetrics and gynecology for 38 years and has personally delivered over 6,000 babies. He continues to have an active practice in general ob/gyn, serving as a Clinical Professor. He is a nationally recognized expert in patient safety, peer review and data driven quality improvement and has served numerous roles in the field and lectured nationally and internationally. Dr. Wachtel is the Assistant Secretary for the American College of Obstetricians and Gynecologists (ACOG) and currently serves on the ACOG National Executive Board and Executive Committee. He is the immediate Past Chair for ACOG District IX (the state of California) and also previously served for three years on the ACOG national Executive Board. He also serves on the Executive Committee for the California Maternal Quality Care Collaborative and is an Expert Medical Reviewer for the Medical Board of California.

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