OUR TEAM

Doctors and Staff

Dr. Walter Kostrzewski

Meet the experienced and friendly staff who make Stony Hill Dental Care the leading provider of oral hygiene and personalized dental services in Bethel.
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All of the staff at Stony Hill Dental Care make it their priority to treat you like family. Whether you need a simple cleaning or extensive dentistry we will be with you the whole way. We know that most patients are not the biggest fans of the dentist so we strive to make each visit as comfortable as possible.

Dr. Andrea Foos

Education:
– Tufts University School of Dental Medicine
– Barry University, MS degree in Biomedical Sciences
– University of Central Florida, BS degree in Biology
– Current member of the American Dental Association
Dr. Andrea Foos grew up in the suburbs of South Miami with her parents and two brothers. Her mother was a dental assistant, now trained to be a dental hygienist. The dental field was always a part of Dr. Foos’s life and her love for science and art motivated her to go down the dental track. She completed her undergraduate degree in Biology at the University of Central Florida, becoming the Vice President Director in the Pre-Dental Student Association and falling in love with the profession.
Upon graduation, she went on to work in a dental office for two years in Miami to gain a better
understanding of life as a dentist. This job had only fueled her passion to become a dentist herself, leading her to complete a Master of Biological Sciences degree at Barry University and then a DMD degree at Tufts University School of Dental Medicine. She is a current member of the American Dental Association.
Dr. Foos is in the perfect profession because she has the biggest sweet tooth! When she is not baking for
her friends and family over the weekend, you can find her in the mountains hiking or skiing. When weather traps her inside, she loves to curl up with a nice book and hot cup of tea. Dr. Foos has a passion for knowledge and is always continuing her education and looking to grow as a provider. Her calming and gentle nature puts patients at ease as she strives for perfection in her craft.

Dr. Rory J. Perimenis

Providing the most advanced dental care in a comfortable and pleasant atmosphere are the priorities of Dr. Rory J. Perimenis, DDS.
Dr. RJ is a fervent believer in conservative dentistry and works closely with patients to create a life-long dental care plan. Dr. RJ is diligent in his pursuit of providing leading dental care procedures while utilizing innovative technology, supplies, and equipment.
Dr. RJ graduated Magna Cum Laude with a degree in Biology from Quinnipiac University in 2013. He followed in his father’s footsteps and earned his doctorate degree from New York University College of Dentistry in 2017.
He is committed to his health and fitness, and loves sports (his favorite teams are the NY Yankees and NY Jets). He enjoys time spent with his wife, and their French Bulldog, Banks.

Mercedes Serrato RDH

Mercedes has worked with Stony Hill Dental Care for over 20 years! She is a meticulous hygienist who never fails to make each patient leave with a great big smile after their dental cleanings. Mercedes is the very proud mother to one grown son. In her free time she enjoys reading cooking spending time with her family and SHOPPING LOTS of SHOPPING.

Diomary Abreu CDA

​Diomary has been with Stony Hill Dental Care for over 15 years. She has a unique calmness about her that can put even the most anxious patients at ease. Diomary is the mother of two beautiful girls and one feisty four-legged Chihuahua! In her free time she enjoys long walks, camping, and spending time with her family and friends.