Meet Our Practitioners

Our Medical Practitioners

Champlain Medical Our Medical Practitioners Josh Schwartzberg DO

Josh Schwartzberg, DO

Dr. Josh Schwartzberg  (“DocJosh”) is an Osteopathic physician who started medical practice in Vermont as a Senior FAA aviation medical examiner in 2000 and by 2012  expanded his work to create the only locally owned private practice Urgent Care clinic in the Burlington area (Champlain Medical Urgent Care). He has had over 45 years' experience providing the highest quality medical care with deep expertise in primary care/family practice as well as emergency medicine and occupational medicine. He has been a Diplomat of the American board of Family Practice and has held faculty positions at UVM Medical School, Thomas Jefferson Medical School and New York College of Osteopathic Medicine. He is an avid fly fisherman, skier, gourmet cook and instrument rated pilot who flies his Cessna on floats in summer and on skis in winter. His flying passion includes wilderness camping trips as far away as Alaska and Labrador. He was chosen by his peers as one of the first Vermont physicians to be part of the Best Doctors organization and has served on the Board of Directors of the New England College of Occupational and Environmental Medicine. He has been appointed Medical Officer for City of Burlington and also as Civil Surgeon for the U.S. Customs and Immigration Service. Other certifications have included Medical Review Officer (MRO) and Independent Medical Examiner (IME). He also has served as representative for Health First on the MVP health insurance quality improvement committee.

His Occupational medicine work proudly includes clients such as IBM, UVM, City of Burlington, St. Michaels College, Keurig Green Mountain, ECI, Vermont Rail, CCTA, Champlain Chocolates and many dozens of smaller companies. 

LinkedIn Profile for Dr. Josh Schwartzberg

Champlain Medical Our Medical Practitioners Beth Schiller, AGNP

Beth Schiller, AGNP-C

Beth Schiller was originally trained as an engineer and worked as a healthcare information consultant for more then 20 years. She wanted to take care of patients instead of creating and implementing software solutions for clinicians. Beth enrolled at the University of Vermont in 2011 in a Masters Entry Nurse Practitioner Program and completed a Masters In Nursing in December 2014. Her hobbies include flying as an instrument pilot, sailing, skiing and bicycling.


LinkedIn Profile for Beth Schiller


    Vivian Esparza, MD

Vivian Esparza , MD, is from El Paso, TX.  She worked as an oncology nurse for 5 years prior to  attending medical school at UT San Antonio.  She then moved to the northeastern US for residency and has been a family medicine physician in Vermont for 20 years.  On arriving to Vermont, she worked for UVMMC at the Colchester Family Medicine Clinic.  She then worked with her colleagues to open Winooski Family Health.  While there, the need for physicians focusing on treating substance use disorders continued to increase.  She continued her education in this area and became certified by the Board of Addiction Medicine in addition to maintaining her family medicine board certification.  During this time she assisted Howard Center in expanding their treatment programs and eventually worked with patients who were incarcerated.  This experience has contributed to her holistic approach to health care.  She spends her free time with her 3 daughters, visiting family in the southwest, and hiking is a passion.


Champlain Medical Our Medical Practitioners Dr Karen Huyck MD PhD MPH FACOEM

Dr. Karen Huyck, MD, PhD, MPH, FACOEM

Dr. Huyck is a board-certified occupational and environmental medicine physician with extensive clinical experience in diverse areas of occupational and environmental medicine, including as a staff physician at both on and off-site clinics, disability consultant, utilization reviewer and impartial medical examiner. She is a fellow of the American College of Occupational and Environmental Medicine (ACOEM). She received her M.D. and Ph.D. from the University of Vermont and did her internship in Internal Medicine at The Cambridge Hospital in Cambridge, Massachusetts, a teaching affiliate of Harvard Medical School. She completed her residency in Occupational and Environmental Medicine and her MPH in Environmental Health at the Harvard School of Public Health as an ACOEM Occupational Physician Scholar