Pediatrician Staff

We believe in a team approach to your child’s health and well-being.  Your child’s physician, along with the entire staff of LPPG, collaborates with each family to provide excellent pediatric care, education and support to every child.   

Our five physicians (each is a partner in the practice) and two nurse practitioners are supported by a full team of kid-loving RNs and two medical technicians. The doctors hand-picked each staff member, not only for their extensive pediatric skills, but for their desire to help parents raise happy, healthy children.  Rounding out this team is the clerical and administrative staff which stands ready to assist each and every patient family. 


OUR PHYSICIANS

Each of our skilled and passionate providers has dedicated their career to child-focused health care.  We hope you find these brief biographies helpful in getting to know them.

Mathew Empie, M.D.

Dr. Empie is board certified by the American Board of Pediatrics (ABP), is a Fellow of the American Academy of Pediatrics (FAAP) and clinical instructor at the University of Rochester. He graduated Summa Cum Laude from the University of Rochester with a B.A. in Economics, and then stayed in Rochester to receive his medical school training.  After completing his pediatric residency at the University of Rochester in 2005, he was asked to remain at Strong Memorial Hospital for an additional year to serve as Chief Resident in Pediatrics.  Deeply committed to the Rochester community and its children, Dr. Empie then joined Long Pond Pediatrics in the summer of 2006.

He and his wife, who practices Obstetrics and Gynecology here in Rochester, have two young daughters.  As time allows, Dr. Empie enjoys racquet sports, skiing, music, classical literature, drawing and pottery. 


Maryanne Kiernan, MD

Dr. Kiernan joined Long Pond Pediatrics in September 1992 after eight years in practice in Ithaca, New York. Her undergraduate degree is from Marywood College in Scranton, Pennsylvania and she received her medical degree from SUNY at Buffalo. Her residency and fellowship years were at Tufts New England Medical Center in Boston, Massachusetts.

She is a board certified by the American Board of Pediatrics (ABP), and is a Fellow of the American Academy of Pediatrics (FAAP).  She is also a clinical assistant professor at the University of Rochester and a member of the Academy’s Section on Foster Care and Adoption. Her special interest is providing comprehensive medical assessment and care of international adoptees.  She currently serves as a representative on the AAP  NY 1 Rochester Pediatric Council.

Dr. Kiernan and her husband are devoted parents of two adopted daughters, their eldest from China, and their youngest daughter from Kazakhstan.  In addition to traveling she enjoys her participation in the many activities of the Rochester region of Families with Children from China.


Sarah Leddy, MD 

Dr. Leddy joined the practice in July of 1991. She graduated from Kenyon College and received her medical degree from Case Western Reserve University School of Medicine. After completing her pediatric residency here at the University of Rochester, Dr. Leddy worked for one year in the Pediatric Emergency Department at Strong Memorial Hospital. She is Board Certified by the American Board of Pediatrics (ABP) and a Fellow of the American Academy of Pediatrics (FAAP). She is also a Clinical Instructor of Pediatrics at the University of Rochester.

Dr. Leddy and her husband have two teenage children and reside in Mendon.  Along with spending time with her family and her two Chinook dogs, her interests include hiking, canoeing, x-country skiing and cooking


Elizabeth O’Brien, MD

Dr. O’Brien joined the practice in April of 1998. She graduated from Middlebury College and received her M.D. degree at Hahnemann University in Philadelphia. After completing her residency at Strong Memorial Hospital, she was asked to join Long Pond Pediatrics. She is Board Certified by the American Board of Pediatrics (ABP) and a Fellow of the American Academy of Pediatrics (FAAP). Dr. O’Brien is also a Clinical Instructor of Pediatrics at the University of Rochester.

She and her husband, who reside in Greece, have three daughters and an adopted son from Ethiopia. She enjoys running and gardening when she has time!


Diana Williams, MD

In August of 1994 Dr. Williams joined Long Pond Pediatrics after completing her pediatric residency training. As an undergraduate she majored in chemistry at Lincoln University, and then attended Penn State University’s College of Medicine in Hershey Pennsylvania.  Her pediatric training consisted of one year at Boston City Hospital in Boston and two years at the University of Rochester. During her final year of training Dr. Williams also served six months as Chief Resident at Rochester General Hospital. She is Board Certified by the American Board of Pediatrics (ABP) and a Fellow of the American Academy of Pediatrics (FAAP).  In addition, she is also a Clinical Instructor of Pediatrics at the University of Rochester.

Outside the office Dr. Williams enjoys traveling, sports and spending time with her family.  Her hobbies include reading novels and scrapbooking. She and her husband, who reside in West Irondequoit, have four daughters.


OUR NURSE PRACTITIONERS

Rosemary Burnett, CPNP

Rosemary received her Bachelor’s degree in nursing from Penn State University in1994 and relocated to Rochester to begin her nursing career at Strong Memorial Hospital.   After a brief time caring for patients in general medicine, she became a staff nurse on the adolescent medicine unit.  During that time, she completed her Masters Degree in the Care of Children and Families and became a Board Certified Pediatric Nurse Practitioner. As nurse practitioner, Rosemary worked for three years in the Pediatric Hematology/Oncology Division at Golisano Children’s Hospital at Strong, and then joined Threshold Alternative Services for Youth, serving underinsured and underserved youth.  In 2008, Rosemary joined Long Pond Pediatrics.  She provides both pediatric primary care and adolescent reproductive health care.  

Rosemary and her husband reside in Canandaigua with their young daughter.  She enjoys traveling to see family and friends, and looks forward to visits from her two stepchildren, now grown.


Elaina Howell, C.P.N.P

I joined Long Pond Pediatrics in January 2014 after working 17 years at Golisano Children's Hospital at Strong.  While completing my undergraduate degree in Nursing at Roberts Wesleyan College, I began working on The Children's Unit at Strong as a patient care technician.  After completing my degree, I began working on The Children's Unit as an RN.  While working as an RN, I began coursework in my nurse practitioner program and completed my Master's degree in Care of Children and Families from the University Of Rochester School Of Nursing in 2004.  Later that year, I began working as a PNP in the division of genetics and metabolism and continued there for the last nine years.  I am certified by the American Nurse's Credentialing Center as a Pediatric Nurse Practitioner in primary care.  Aside from spending time with my husband and two children and volunteering in their classrooms each week, I enjoy hiking, reading, and scrapbooking.