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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

Registered Dieititian

Katie received a Bachelor of Science in dietetics from the University of Delaware and graduated with a Master of Science degree concentrating in Functional Nutrition from Stony Brook University. She is the current President of the Long Island Academy of Nutrition and 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 clinical inpatient and outpatient settings. She is a renal dietitian who has also worked with oncology, critical care, and post-operative bariatric patients. She has unique experience with performance nutrition, using DEXA and VO2 max technology. 

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