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.

Lauren A. Geddes, MD

Pediatrician

Dr. Geddes graduated from Dartmouth College and the Brown-Dartmouth Program in Medicine. She completed her pediatric residency at Brown University’s Hasbro Children’s Hospital/Rhode Island Hospital and was selected to serve an additional year as Chief Resident in Pediatrics. Upon completing her residency she established the pediatric practice in Sudbury that later became Mill Brook Pediatrics. She is a Diplomat of the American Board of Pediatrics and is a Fellow of the American Academy of Pediatrics. Dr. Geddes is the Chairperson of the Emerson Physician Hospital Organization and serves on the Board of Directors for Partners Community Physician Organization. She is actively involved in molding the future of healthcare at the regional level. She is a member of the active medical staff at Emerson Hospital.

William Wirth, MD

Pediatrician

Dr. Wirth graduated from the University of New Hampshire and the Brown-Dartmouth Program in Medicine. He completed his pediatric residency at Brown University’s Hasbro Children’s Hospital/Rhode Island Hospital. He was also chosen to serve an additional year as Chief Resident in Pediatrics. Prior to settling at Mill Brook Pediatrics, he practiced in large multi-specialty groups and as a solo practitioner. He has held faculty appointments at Dartmouth Medical School and the University of Massachusetts Medical School. He has also served on his local Board of Health. He is a Diplomat of the American Board of Pediatrics and is a Fellow of the American Academy of Pediatrics. Dr. Wirth serves as Medical Director for Mill Brook Pediatrics.

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.