Our Team

Dominica Costello, DO

Doctor Costello is a board certified endocrinologist and Obesity Medicine Specialist who 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.  She then did four years of internal medicine residency at Berkshire Medical Center.  Her endocrine fellowship training was at Baystate Medical Center.

Since completion of her training, Dr. Costello has been on staff at Portsmouth Regional Hospital, Anna Jaques Hospital, and joined Middleton Family Medicine in 2016.

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.

Erica Ouellette RD, CDE

I am very excited to be joining the Middleton Family Medicine team.  I am a graduate of Framingham State University Didactic, Bachelor Degree program in 2001 and the University of Delaware Internship program in 2003.  Currently I am a matriculated Master’s student at Framingham State University, Masters’ in Nutrition Education.  I have been a Registered Dietitian for twelve years and a Certified Diabetes Educator for six years.  For the last ten years I have worked as the lead Dietitian for the Weight Management program at Lahey Out Patient facility in Danvers MA, additional counseling experience includes, Cardiac Rehabilitation patients, childhood obesity, Gestational Diabetics, Type 2 and Type 1 Diabetic patients, eating disorder diagnoses as well as various Gastrointestinal diagnoses. The last year I have also worked within the Massachusetts General Pediatric Endocrinology department in Boston.

I enjoy counseling patients in group and individual settings.  I have extensive training in Motivational Interviewing as well as working with Oncology patients.  I am also a Certified Life Coach from the State of Massachusetts in the Diabetes Prevention Program.   I take great pride in seeing my patients succeed.

I reside on the North Shore with my husband and daughter and I enjoy spending time with them and my family in New York State.

Janice Thoen, BSN MSN FNP CDE

Janice has 23 years in nursing and 12 more years working as a Family Nurse Practitioner. She has been working in the Middleton office since 2007.

After earning a BSN at the University of Iowa in her native state she went on to receive an MSN at Regis College in Weston, Massachusetts and the Family Nurse Practitioner designation in 2005.

Her special interests include Preventative Health and Diabetes. She became certified as a Diabetic Educator in 2017 and is excited to focus in that direction.

Janice lives on the Northshore with her husband and dog. She has 3 grown children. Her recreational interests include sailing, swimming, cycling and skiing.

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