Our Pediatricians Serve Greenwich

Riverside, Old Greenwich, New Canaan, And all surrounding areas...

Meet our team at Riverside Pediatrics, LLC! Please take a few moments to learn about our skilled practitioners and our friendly, nurturing staff.

At Riverside Pediatrics, LLC, we consider it both a great joy and responsibility to care for children. Most of us are parents ourselves, so we strive to be understanding and available to the families we are privileged to serve. We are honored that you have chosen us as your child's primary medical provider and are confident that you will be pleased with the quality of care and service that we can provide you and your family.

All of our nurses are highly trained and have extensive pediatric experience. All of our experienced physicians are Board Certified in Pediatrics and have been practicing pediatrics for years. Our doctors are known for providing superior, quality medical care to children throughout the area. Our primary physicians have active privileges at Greenwich and Stamford Hospitals.

Patient Testimonials

Dr. Karen Beckman - Pediatrician

Karen Beckman, MD

Pediatrician serving the Greenwich, CT area

Riverside Pediatrics, LLC

Dr. Karen Beckman is the founder and owner of Riverside Pediatrics, LLC. She was voted Castle Connolly Top Doctor (every year from 2013-2021) and has been selected as one of "Fairfield County's Top Doctors" by Greenwich Magazine, Stamford Magazine, Westport Magazine, Fairfield Living Magazine and New Canaan-Darien Magazine every year since 2013. She was also selected as a New York Magazine Top Doctor and a Connecticut Magazine Top Doctor most recently in 2021. She was also listed as a "Top Doctor" by the New York Times numerous times. Dr. Beckman is Board Certified by the American Board of Pediatrics and is a Fellow of the American Academy of Pediatrics. She is a member of the American Academy of Pediatrics, a former member of the Stamford Hospital Credentialing Committee and a former board member of the Greenwich Physicians Association. She has been a medical consultant on television news. She has given numerous educational talks at local schools and organizations and has been interviewed in the local newspapers. She is conversant in Spanish.

Dr. Beckman grew up in Guilford, Connecticut. She attended Hamden Hall Country Day School and then Tufts University where she received a B.S. double majoring in Psychology and Spanish and was in the National Psychology Honors Society. She then attended Tufts University School of Medicine, where she was a peer advisor. She completed her Pediatric Residency at NYU Medical Center/Bellevue Hospital where she was chosen to be Chief Resident. In 2000, she began a career in private practice in Stamford and New Canaan, CT. There she developed a large patient following because of her superior clinical expertise and her warm bedside manner. She became partner at the practice during which time she provided ongoing training for and direct supervision of all new pediatricians. She left her first practice so that she could open Riverside Pediatrics in January 2006.

Dr. Beckman is very active in her local community. She is married with two sons both of whom attend school in Greenwich, where she and her family have lived since 2000.

  • Dr. Beckman has been named a Castle Connolly Top Doctor in the field of Pediatrics every from from 2013-2019. Please click on the hyperlink (below to the right) to view her Castle Connolly Profile.

Dr. Alejandro Mones - Pediatrician

Alejandro Mones, MD

Pediatrician serving the Greenwich, CT area

Riverside Pediatrics, LLC

Dr. Alejandro ("Alex") Mones is Board Certified by the American Board of Pediatrics. Dr. Mones completed his undergraduate studies at Williams College, where he obtained a B.A. in Chemistry with a concentration in Science and Technology Studies. He attended medical school at the University of Rochester School of Medicine and Dentistry and then completed his Residency in Pediatrics at Baystate Medical Center/Tufts University School of Medicine.

Dr. Mones grew up in Monroe, NY, where he played cello in several local orchestras, mentored peers, tutored algebra, and recorded audio books for the blind and dyslexic. He continues to play cello in his spare time and has additional interests in photography, technology and movies.




Dr. Beth Rosenberg

Vaishali Bansilal, MD

Pediatrician serving the Greenwich, CT area

Riverside Pediatrics, LLC

Dr. Vaishali Bansilal is excited to join the team at Riverside Pediatrics on October 7, 2019. She will be working full time at the Greenwich office.

Dr. Bansilal completed her Pediatric Residency training at The Brooklyn Medical Center affiliated with the Mt. Sinai Medical System in New York. She then furthered her training by completing a Fellowship in Pediatric Nephrology at SUNY Downstate Medical Center in New York. Prior to moving to the United States from her native India, she received an undergraduate degree in Biology at D.G Ruparel College in Mumbai, India and then graduated from medical school at Lokmanya Tilak Municipal Med College in Mumbai India. After medical school, Dr. Bansilal practiced as a Family Practitioner in a primary care clinic in Mumbai, India before moving to the United States to pursue further medical training in pediatrics.

After completing her pediatric training, Dr. Bansilal moved to Fairfield County and joined StayWell Health Center, where she worked with underprivileged children and families. While there, she established and coordinated the Quality Improvement Project for Asthma Care which resulted in a 20% increase in appropriate follow up care for asthmatics. Known for her breastfeeding expertise, she also championed the cause of educating underserved patient populations on the advantages of breastfeeding. After several years at StayWell, she moved to New Jersey where she enjoyed working in private practice and building relationships with her patients and their families at Tribeca Pediatrics.

Dr. Bansilal and her husband recently relocated to Rye Brook, NY with their 6 year old son and 3 year old daughter so that they could raise their children surrounded by extended family. Dr. Bansilal’s passions include cooking and baking with her children, traveling and learning about new cultures and history as well as Indian classical dance.

Dr. Bansilal is Board Certified by the American Board of Pediatrics. She is accepting new patients and is in-network with most insurances.

Dr. Bansilal is fluent in English, Hindi and Marathi.



Abby Siegel, MD

Starting May 18, 2020, Dr. Abby Siegel will be seeing patients at our New Canaan office. She is Board Certified by the American Board of Pediatrics and has been working in pediatrics for 22 years. She has been working part time on evenings and weekends at Riverside Pediatrics since 2013.

Dr. Siegel grew up on Long Island. She met her husband Marc in College at U Penn, and continued to Medical School at SUNY Stony Brook. She completed her Pediatric training at Children’s National Medical Center in Washington, DC. Dr. Siegel worked as a hospitalist and then moved to private practice for 15 years in Maryland. Ten years ago she and her family moved back to Westchester, NY. She and her husband have a 20 year old son who attends U Michigan, and a 17 year old daughter.

Dr. Siegel has been recognized as Top Doctor in Washington DC, Maryland and Connecticut as well as one of America’s Top Pediatricians. She enjoys mentoring and interviewing medical students through NY Medical College. Her interests include baking, gardening, painting, community service and their dog Maxie. She is conversant in Spanish.

Kim Cifelli, APRN

Kim Cifelli is a Certified Pediatric Nurse Practitioner and Lactation Counselor, looking forward to joining the team on November 2nd, 2020. Kim’s career in healthcare started over ten years ago, after graduating from Villanova University College of Nursing. She went on to work as a Senior Nurse Clinician in NYU’s Pediatric Emergency Department. During her time at NYU, she devoted time to several pediatric committees including a quality improvement project which aimed to improve patient comfort during procedures.

While working at NYU, Kim received her Master of Science, Advanced Practice Pediatrics, graduating with honors. Kim collaborated with fellow colleagues to contribute to a book which received the 2018 American Journal of Nursing Book of the Year Award, Behavioral Pediatric Healthcare for Nurse Practitioners. Kim has enjoyed working as a Pediatric Nurse Practitioner and lactation specialist with families at both a local clinic and private practice. As a lactation counselor, Kim enjoys helping parents navigate common feeding challenges. She looks forward to getting to know your family and community. Kim and her husband moved back to Connecticut to raise their family where she grew up. In her spare time, you may find her chasing after her toddler son in Darien, CT.

Mary S. Briggs

Mary S. Briggs is a Board Certified Pediatric Nurse Practitioner and is thrilled to be joining the team at Riverside Pediatrics! Mary worked as a PNP at Wildwood Pediatrics and Adolescent Medicine in Essex, CT for the past two years, and is excited to transition her career in pediatric healthcare closer to her home in Fairfield County.

A New Jersey native, Mary graduated Magna Cum Laude from Fairfield University in 2014 with a major in psychology. Upon graduation, Mary spent two years volunteering and working in the Federated States of Micronesia (an incredible small island nation in the Pacific Ocean), which dramatically broadened her worldview and was a humbling and educational experience in working with people from other cultures and backgrounds. After working across the world, Mary began her graduate studies at the Yale University School of Nursing, receiving her RN license through an accelerated certificate program and then completing her Master's Degree in Advanced Practice Nursing specializing in Pediatric Primary Care. Mary graduated from Yale with Honors in May of 2019 and began her career working as a PNP shortly after.

Mary is experienced and enthusiastic about the care of pediatric patients and their families, providing both ill and well-care for patients ranging from newborns to young adults. Her particular fields of interest include obesity management and nutrition, sports medicine, and reduction of risk-taking behaviors in adolescents. However, what she loves most about pediatric health care is the privilege to work closely with families and patients to assist (even in the smallest ways!) in their development, safety, and well-being.

Mary lives in Fairfield, CT, with her husband and two dogs. In her free time, you can find Mary on the tennis court, relaxing by the water, or attempting new projects around her house and garden.


All Riverside Pediatrics physicians are affiliated with both
Greenwich Hospital & Stamford Hospital
For more information on our pediatricians call Riverside Pediatrics, LLC:
Greenwich: (203) 629-5800 / New Cannan: (203) 920-1675

Contact Us

Greenwich: 203-629-5800
New Canaan: 203-920-1675