Uptown Pediatrics

John Larsen, MD

Beth Cohen, MD

Ivanya Landon Alpert, MD

Jennifer Cerasoli, MD

Michelle L. Klein, MD

Amita S. De Souza, MD

Emese Szirtes, RN, IBCLC

Our Providers

John Larsen, MD

Specialty:  Pediatrics, Pediatric Infectious Disease

John Larsen has been a doctor at Uptown Pediatrics since 1985. A New Yorker since birth, Dr. Larsen received his BA at Queens College and his MD at Downstate Medical Center. He stayed in New York to complete his pediatric residency, chief residency, and pediatric infectious disease fellowship at Mount Sinai Hospital. Dr Larsen is a member of the American Academy of Pediatrics and a former president of the New York Pediatric Society. As an associate clinical professor and associate attending at Mount Sinai Hospital, he is actively involved in teaching medical students and residents. He has published several scholarly articles on topics in infectious disease, and remains the office expert on pediatric infectious disease and dermatology. Dr Larsen's interests include, biking, reading, and music. He occasionally leaves the island of Manhattan to go hiking and enjoy the outdoors.

Beth Cohen, MD

Specialty:  Pediatrics

Beth Cohen has been at Uptown Pediatrics since 1988. Dr. Cohen completed her undergraduate studies at University of Florida and Tulane, and her medical degree at University of Miami. She then moved to New York City where she completed three years of pediatric training at Mount Sinai Hospital. After completing residency, she went into private practice right away because she "absolutely loves children." Dr. Cohen is an active member of the American Academy of Pediatrics. She is also married to a pediatrician, and is the proud mother of three children.

Ivanya Landon Alpert, MD

Specialty:  Pediatrics, Adolescent Medicine

Ivanya Landon Alpert joined Uptown Pediatrics in 2006. Dr. Alpert is a native New Yorker (Ethical Culture '85, NBS '89) who received her BA from Harvard College in 1994 and her medical degree from The University of Pittsburgh in 2000. She then returned to New York to complete her pediatric residency and adolescent medicine fellowship at Mount Sinai Hospital. Dr. Alpert has particular expertise working with teenagers. She has presented nationally on various adolescent health topics, and is listed on New York Magazine's 2018 Best Doctors list for Adolescent Medicine. She is currently a Clinical Assistant Professor at the Mount Sinai School of Medicine. When not in the office, Dr. Alpert enjoys spending time with her husband, a pediatric emergency physician, and their three children.

Jennifer Cerasoli, MD

Specialty:  Pediatrics

Dr. Cerasoli joined the practice in 2009. After completing her undergraduate degree in Biology and Society at Cornell University, she went on to obtain her medical degree at New York Medical College and completed her pediatric residency at Mount Sinai Hospital where she served as Pediatric Chief Resident. Dr. Cerasoli is actively involved in teaching medical students and residents. Dr. Cerasoli, who also speaks Spanish, is particularly interested in child advocacy and outreach to children with developmental disabilities. We are pleased to have her as part of the group.

Michelle L. Klein, MD

Specialty:  Pediatrics, Pediatric Endocrinology

We are thrilled to announce that Dr. Klein, who has covered our practice since 2008, is now an official member of our group. In addition to being a board certified pediatrician, Dr. Klein also specializes in Pediatric Endocrinology. Dr. Klein received her undergraduate degree in Neuroscience from UCLA, her master's degree in Physiology and Biophysics from Georgetown University; and her medical degree from New York Medical College. Dr. Klein completed her residency training at Mount Sinai Hospital, where she served an additional year as Pediatric Chief Resident. Dr. Klein, then went on to complete her fellowship in Pediatric Endocrinology, also at Mount Sinai Hospital. During her training at Mount Sinai Medical Center, Dr. Klein maintained an active schedule in the teaching of medical students, residents, and fellows and, in this regard was honored with the Arnold Gold Humanism in Medicine Teaching Award. Dr. Klein is particularly interested in growth and short stature, thyroid disease, children born small for gestational age, abnormal pubertal development, and has authored many publications on these topics. In her spare time, Dr. Klein enjoys traveling, playing volleyball, dancing, and spending quality time with family and friends.

Amita S. De Souza, MD

Specialty:  General Pediatrics and Pediatric Endocrinology

Dr. De Souza joined the practice in August of 2018. She completed her undergraduate degree in Neuroscience from the University of Rochester followed by medical school at SUNY Buffalo School of Medicine. In medical school she was honored to be inducted to the Gold Humanism Honor Society. Dr. De Souza then went to the University of Maryland Medical Center for her residency in pediatrics and stayed on as a Pediatric Chief Resident, Hospitalist and Primary Care Pediatrician. While at Maryland, she was awarded the J. Edmond Bradley Outstanding Teacher Award, Resident Research Award and the Chief Resident Award. After training, Dr. De Souza completed her fellowship at New York Presbyterian - Weill Cornell Medicine. At Cornell her research focused on patients with congenital hypothyroidism and congenital adrenal hyperplasia. Dr. De Souza is particularly interested in children with thyroid disease, growth disorders, bone disease, abnormal puberty, and obesity. In her free time, she enjoys traveling, gardening, cooking for her family and friends and is currently learning Spanish so she can converse with her in-laws!

Emese Szirtes, RN, IBCLC

Specialty:  Pediatric Nursing, Lactation Counseling

Emese Szirtes also known as Nurse Mesi (mè-shee) has a vital role in helping to keep our patients healthy since 2006. In addition to her being the Practice's Nursing Supervisor, Nurse Mesi holds certification in lactation counseling and is our in-house breast-feeding expert. When she's not educating our parents on the safety and importance of vaccination and helping our new moms with breastfeeding, she's spending quality time with her energetic son!

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