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Coastal Nutrition Counseling’s office is located in Huntington, Long Island, New York.

We also offer country-wide Telehealth services.

All of our dietitians accept health insurance.

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Leah Mark MS, RD, CDN, CPT

Registered Dietitian

Leah is a Registered Dietitian with a Master of Science degree in Clinical Dietetics from New York University. She is currently completing a doctoral degree in Clinical Nutrition focusing on functional medicine. Leah counsels patients using an integrative approach that combines medical nutrition therapy with lifestyle counseling.​

Prior to starting Coastal Nutrition Counseling, Leah worked as a private practice clinical dietitian with a focus on gastroenterology and endocrine disorders. Her background also incorporates exercise science and kinesiology, both of which she applies as necessary to help patients reach their goals.

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Mandy Li MS, RD, CDN, CNSC

Registered Dietitian

Mandy has a Bachelor of Science degree in Nutrition from LIU Post and a Master’s degree in Nutrition from Stony Brook with a focus on Integrative Nutrition Therapy. In addition, she has an Associate’s degree in Culinary Arts from Johnson & Wales University. 

Mandy is passionate about helping her patients find approachable lifestyle changes that are sustainable and individualized. She embraces motivational interviewing and inclusivity in her nutrition counseling practice. Mandy leads with a food-first approach while providing the highest quality Medical Nutrition Therapy to help manage various disease states.

Mandy holds an advanced board certification as a Certified Nutrition Support Clinician. She is certified to manage tube feeding regimens (enteral and parenteral nutrition). She is currently practicing as both an inpatient oncology and clinical dietitian.

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Katie Hoffman MS, RD, CDN, CDCES

Registered Dieititian

Katie is a board-certified diabetes care and education specialist and received a Bachelor of Science in dietetics from the University of Delaware. She also holds a Master of Science degree concentrating in Functional Nutrition from Stony Brook University. She is the current co-regional director of the southern region of the New York State Academy of Nutrition & Dietetics. 

Katie is passionate about helping her patients manage their health through anti-inflammatory protocol, coupled with mindful eating and movement. She welcomes working with patients who have clinical nutrition needs as well as those who want to improve general health and well-being. 

Katie developed an outpatient nutrition clinic for first responders of the terrorist attack on September 11th, 2001. She is currently still actively counseling patients enrolled in the program. Katie also spent many years teaching cooking classes.

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Kayla Cohen MS, RD, CDN

Registered Dietitian

Kayla received a Bachelor of Science degree in Nutrition from SUNY Oneonta. She completed her Master of Science degree in Nutrition with a focus on Integrative Nutrition from Stony Brook University.


Kayla takes pride in providing medical nutrition therapy with an easy, realistic, and sustainable approach. Her patients can expect to improve their overall health, bloodwork, and symptoms without feeling restricted and fearful of any foods. 

Kayla works in both inpatient and outpatient settings. She counsels patients interested in weight loss in addition to being an experienced oncology, renal, critical care, and 

bariatric dietitian. Kayla also works with athletes for their sports nutrition needs. She is skilled at using DEXA, InBody metabolic testing, and VO2 max technology. 

Melissa Flynn MPH, RD, CDN, IBCLC

Registered Dietitian

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Registered Dietitian

Melissa received a Bachelor of Science degree in Dietetics from Buffalo State University. She completed her Master of Public Health degree at Hunter College. Melissa is an Internationally Board Certified Lactation Consultant passionate about women's health and infant and pediatric nutrition. She is an expert regarding infant latching concerns, and can conduct consults via Telehealth.


Melissa has over 10 years of experience working with women throughout their life phases, including hormone management, fertility, pregnancy, and postpartum.  Melissa is also well-versed in supporting families navigating the nutritional needs and concerns of infants, toddlers, and children. This includes the areas of starting solids and picky eating. In addition, Melissa works with individuals looking for weight management, chronic disease management (including diabetes), or general healthy eating.

Kristina D. Thomopoulos-Titomihelakis  

Kristina holds a Bachelor of Arts Degree in Psychology with a dual minor in Nutrition as well as Africana, Puerto Rican, and Latinx studies from CUNY Hunter College, where she was also a two-sport NCAA athlete. Upon her return from playing professional basketball in Greece, Kristina obtained her Master of Science Degree in Human Nutrition with a concentration in Clinical Nutrition Research from Drexel University. ​She went on to complete her dietetic internship residency at The National Institutes of Health (NIH), where she was also an appointed member of their NIH Academy Program, which trains young scientists to better address health inequities within their clinical specialties. Kristina obtained advanced clinical and research training in 2020 as the first dietitian appointed as the Leadership Education in Adolescent Health (LEAH) Nutrition Fellow at the Children’s Hospital of Philadelphia (CHOP).  Kristina holds a Ph.D. in Nutrition Sciences focusing on behavioral and nutritional neuroscience with a concentration in secondary data analyses. ​Kristina has clinical and research training in adult and pediatric medical nutrition therapy in oncology, weight management, endocrinology, and eating disorder specialties. Kristina knows that food is not just what we put on our plate-- it is a complex science—and our relationship with food is deeply intertwined with our upbringing and learned behaviors. She guides individuals to achieve their health goals through a health-first, body positive, and ‘all foods fit’ approach.    Kristina is also a Certified Personal Trainer with an advanced credential as a Cancer Exercise Specialist.


Sabrena Reid MS, RD, CDN

Registered Dietitian

Sabrena received a Bachelor of Science degree in Nutrition from Winthrop University while competing as a NCAA Track and Field athlete. She completed her Dietetic Internship and Master of Science degree with a concentration in Integrative Nutrition at Stony Brook University.


Sabrena currently works in both the clinical inpatient and outpatient settings. She specializes in managing cardiovascular diseases, diabetes, obesity, unintentional weight loss, sports nutrition, and general healthful nutrition.

Sabrena helps her patients meet their goals by utilizing food as medicine and encouraging an active lifestyle. Her goal is to provide medical nutrition therapy in a way that is attainable and tailored to the individual. Throughout her practice, Sabrena has led many nutrition groups for varied populations and has appeared in a cooking segment on the Catholic Faith Network.  


Kelly Tahlor RD, CDN

Registered Dietitian

Kelly earned her Bachelor of Science in Nutrition and Dietetics from Long Island University and completed her dietetic internship at Stony Brook Medicine. She works concurrently as an RD at the Bariatric and Metabolic Weight Loss Center at Stony Brook Medicine.

Kelly excels in crafting personalized weight loss and meal plans that enhance overall health and well-being. She is particularly skilled in tailoring nutritional guidance to the unique needs of individuals taking weight loss medications. Whether clients seek to improve overall health, manage a chronic condition, or optimize their diet, Kelly provides practical, science-based advice to help them achieve their nutritional goals.

Before her career as a dietitian, Kelly accumulated extensive experience in food service, which provided a solid foundation for her subsequent roles in health and nutrition. She began her professional journey as a community diabetes educator, where she developed a passion for helping individuals understand the role of diet in managing chronic conditions. 

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