Now serving greater Newburyport area!

Meet the Staff


Dominica Costello

Dominica Costello, DO Founder, Medical Director

Dr. Costello is board certified in both Endocrinology and Obesity Medicine, and has been in active practice since completing her fellowship training in 2006. She completed her undergraduate degree at Wellesley College, and attended the Kansas City University of Medicine and Biosciences for medical school. Medical school was followed by four years of Internal Medicine residency at Berkshire Medical Center, and a two year Endocrinology fellowship at Baystate Medical Center completed her training.

Dr. Costello has been on staff at Portsmouth Regional Hospital, Anna Jaques Hospital, as well as Lahey Beverly Hospital, and after serving as the practice endocrinologist at Middleton Family Medicine for the last four years is now in private practice in Amesbury, MA. 

She enjoys practicing all aspects of general endocrinology, with special focus on obesity and nutrition, diabetes and thyroid disease. As an active member of the Obesity Medicine Association, American Thyroid Association and the Endocrine Society, Dr. Costello is able to attend leading edge conferences and collaborate with other endocrine and weight loss specialists. She is mentored by some of the leading experts in the country.


Jennifer Burns Katafigiotis

Jennifer Burns Katafigiotis MS Director of Nutrition

Jennifer graduated from Fairleigh Dickinson University then received a dual masters in Nutrition Education and Food Science from Montclair State University, New Jersey, where she is currently an adjunct professor and mentor to undergraduate and graduate research students.

For over 20 years Jennifer has worked exclusively in the area of medical weight loss and nutrition education in clinical and private practice settings. To address the growing incidence of childhood overweight and obesity and the lack of programs outside the clinical setting to address the issue, Jennifer created a one of a kind nutrition education program for children – WWC KIDS. In 2018 it was launched at the American Academy of Pediatrics annual conference to rave reviews. In 2019 it was recognized by the International Forum on Advancement in Healthcare and received their award for the program’s contribution to healthcare. Jennifer has contributed to articles and appeared on media outlets in the NYC area. She has spoken at conferences in the US and Europe on topics related to nutrition, food science and weight, and will be a featured TEDx speaker at the inaugural TEDx Rutherford series. Jennifer likes to say that if she won the lottery tomorrow, she would still be working with her patients the next day; It is simply what she loves to do!


Danielle Peterson

Danielle Peterson  Program Director

Danielle has over 15 years of experience in the medical field.  Danielle started off as a medical assistant and phlebotomist in a primary care and endocrinology office.   Danielle has been a part of the creation and expansion of NorthShore Weight and Metabolism since the day we opened.  Prior to that she worked alongside Dr. Costello, managing her endocrinology practice and working as her medical assistant.




NorthShore Weight and Metabolism
110 Haverhill Road, Building A Suite 505
Amesbury, MA 01913
Phone: 978-473-3221
Fax: 833-629-0822

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