Rhinebeck Office

5 Hook Road | Rhinebeck, NY 12572

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Welcome to the Rhinebeck office of CMG.

Our doctors have been caring for children from Rhinebeck to Red Hook, from Pine Plains to Woodstock and many other communities in Northern Dutchess and Ulster Counties for 15 years. We provide a small office environment where you get to know your doctors, while having all of the resources that a large pediatric practice can offer. We focus on all aspects of health care for children, from infants through 21 years of age. We would love to be part of your family; come and be part of ours.

Your Rhinebeck Pediatricians:

Ask Dr. David Fenner what makes his world go around and the answer is simple: kids. When he’s not seeing pint-sized patients in his office, he’s spending his free time urging them to be creative and have fun outside, speaking to groups on nutrition and exercise, and providing treatment for children who otherwise can’t afford medical care.



Larkin Mitchell has led an interesting life. She is a former gymnast, and was an archeologist before going into medicine. She has traveled extensively, including relief work in Haiti as a member of an all-nursing team, which has given her a worldview and wide perspective about medical care. Larkin spent her early nursing career caring for critically ill children and newborns in intensive care. Larkin says, “My focus now in pediatrics is primarily with asthma, allergy and pulmonary conditions.”

Dr. Carolyn Hirschmann grew up on the North Shore of Long Island, and her education spans some of New York State’s finest institutions, from Cornell University to Cohen Children’s Medical Center. At CMG her primary focus is on nutrition and wellness, preventative health, and developmental pediatrics. She believes that establishing good health and nutrition habits from infancy set the groundwork for a healthy and active child.



Caitlin Smart, CPNP is interested in helping kids and adolescents with lifestyle management including weight management, reproductive concerns, and mental health. Caitlin is a Hudson Valley native, growing up in Wappingers Falls and staying in NY State for undergrad and graduate school. She earned two BA degrees – one in neuroscience from Vassar College and one in nursing from Columbia University School of Nursing. Her focus is always on preventing illness by optimizing health.

Judith Sickles, CPNP-PC is a Hudson Valley native who loves children of all ages and capabilities. Her education includes a Masters in Nursing at Stony Brook University School of Nursing as well as an undergraduate degree from College of St Rose, both with high honors, and graduated from Columbia Greene Community College. Judy understands the needs and struggles of special needs children and their families, as well as the process involved in obtaining services and resources to enhance their daily lives.