Our Sudbury Staff
The medical and administrative staff looks forward to getting to know you and your children. As a team, we hope to give you the best medical experience for your child as well as yourself. Please feel free express any questions or concerns and our medical staff/office staff will assist you as soon as possible.
Shelly C. Bernstein, MD
Dr. Bernstein received his A.B. and Ph.D. in genetics from The University of Chicago and his M.D. from Pritzker School of Medicine of The University of Chicago prior to completing his pediatric residency at Boston Children’s Hospital. He then completed a hematology-oncology fellowship at Children’s Hospital and the Dana Farber Cancer Institute in Boston. He is an Assistant Clinical Professor of Pediatrics at Harvard Medical School. Dr. Bernstein is board certified in pediatrics, a member of the Massachusetts Medical Society as well as a fellow of the American Academy of Pediatrics. Dr. Bernstein has a special interest in hematology and oncology and in addition to his patients at Weston Pediatrics, he also cares for children at The Jimmy Fund at the Dana Farber Cancer Institute.
Joshua Gundersheimer, MD
After receiving his B.A. from Amherst College and his M.D. from Harvard University, he completed his pediatric training at Boston Children’s Hospital. He then practiced in Hopkinton, MA before joining Weston Pediatrics in 2001. He has been involved in numerous hospital committees and has been actively involved in teaching medical students throughout his career. He is board certified in pediatrics, a member of the Massachusetts Medical Society as well as a fellow of the American Academy of Pediatrics.
Robert H. Andler, MD
Dr. Andler, a Framingham native, joined us. after practicing in Rhode Island for five years. He received his undergraduate degree from Cornell University and his medical degree from the University of Virginia School of Medicine. He completed his Pediatric Internship and Residency at Hasbro Children’s Hospital and Brown University in Providence, Rhode Island. He is board certified in Pediatrics. He is a member of the Massachusetts Medical Society and a fellow of the American Academy of Pediatrics.
Colleen Brownell-Krupat, MD
Dr. Brownell-Krupat received her undergraduate degree from Wellesley College and her M.D. from Harvard Medical School. She completed her pediatric residency at The University of California at Davis, in Sacramento and is board certified in Pediatrics. Prior to joining Weston Pediatrics in 2011, she worked at Boston Children’s Hospital, both in the emergency department doing urgent care, and as a hospitalist.
Katherine M. Bui, MD
Dr. Bui joined us from Massachusetts General Hospital where she pursued a particular interest in infant development and medical education. She received her undergraduate degree in Linguistics from Scripps College and her M.D. from Boston University School of Medicine. Dr. Bui completed her Pediatric residency at Massachusetts General Hospital and is board certified in Pediatrics. She is a member of the Massachusetts Medical Society and a member of the American Academy of Pediatrics.
Rosemarie Dieffenbach, MD, MPH
Dr. Dieffenbach completed her undergraduate degree at UCLA, went on to obtain a Masters in Public Health from the University of Michigan and received her MD from George Washington University in Washington, D.C. She completed her pediatric residency training at University of California, San Francisco, then served in the U.S. Navy as a primary care pediatrician, stationed in Okinawa, Japan, Naples, Italy, and Bremerton, Washington. She is board certified in general pediatrics and is a fellow of the American Academy of Pediatrics and a member of Massachusetts Medical Society. Before joining Weston Pediatrics in 2011, she worked in urgent care in the Emergency Department at Boston Children’s Hospital.
Karen Ashworth, FNP
Karen received her Masters of Science degree as a Family Nurse Practitioner from Regis College in 2002. She has a Bachelors of Arts degree in Psychology. She has experience in urgent care, family medicine, and has worked in pediatric medicine for over 10 years. Her areas of interest include working with at-risk teens and young adults, adolescent-GYN, asthma education, concussion treatment and education, and integrative medicine.
Andrea Bertorelli, NP
Nurse Practitioner
Andrea graduated from Providence College and received her Master’s of Science in Nursing from the MGH Institute of Health Professionals. Andrea completed her pediatric clerkship at Mill Brook Pediatrics and has never left. She is a certified Pediatric Nurse Practitioner.