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Kenneth W. Willis, M.D.

Executive Medical Director


Kenneth W. Willis, MD, CEDS is a Board Certified psychiatric physician who has been specializing in eating disorder treatment for over twenty-five years. He did his undergraduate work at Harvard, medical school at Dartmouth and completed residency in psychiatry at Dartmouth Hitchcock Medical Center. Dr. Willis has been treating eating disorder patients at all levels of care including inpatient, residential, and partial hospitalization as well as at the outpatient level. As such he has observed eating disorders from their earliest beginnings to their most severe presentations including dealing with life threatening medical complications in hospital settings. He has a broad biopsychosocial perspective on the management of eating disorders throughout the course of the illness, including the role of co-occurring illnesses such as mood, anxiety and trauma disorders and exacerbating environmental factors.

Dr. Willis has extensive facility with the medical management, psychopharmacological treatments, individual, group and family therapy of eating disorders, and has experience as an expert witness in legal cases involving eating disorders.  While focusing on the uniqueness of each individual, he approaches each patient with compassion and knowledge, but also with a sense of urgency towards the goal of acute stabilization and ultimately full recovery.

Dr. Willis is a member of National Eating Disorders Association since its inception, and a strong supporter of family involvement in the management and treatment of their loved ones with eating disorders. He is a member of the Academy for Eating Disorders, a former Founding Clinical Advisory Board Member of Project HEAL and a Member of the Board of Directors of the International Association of Eating Disorder Professionals (iaedp). He is credentialed by iaedp as a Certified Eating Disorders Specialist (CEDS).

Dr. Willis founded prominent Eating Disorder Programs in New Jersey including the University Medical Center at Princeton, and served as Attending Physician, Medical Director and Supervisor in these settings. He has also served as Medical Director and helped to direct the national expansion of other eating disorder residential and partial hospitalization facilities.  Dr. Willis has a private practice in the Princeton, New Jersey area and New York City.

Our Leadership Team


Cindy Pikus, Ph.D., CEDS

Dr. Cindy Pikus has worked with children, adolescents, and adults with eating disorders, as well as their families, for over 25 years.  She brings to her role as Executive Clinical Director her extensive experience and expertise in treating people with eating disorders at all levels of care, with an emphasis on compassionate patient care, support…

Burty Macwan “Mac”, RN

Burty Macwan ‘Mac’ brings to Hidden River a combination of emergency Nursing, behavioral care, and executive experience.  Mac received his Bachelor of Science in Nursing from the University of Nebraska Medical Center – College of Nursing. Mac has worked in the Emergency Department for more than 10 years and is Certified in Emergency Nursing (CEN). …

Jennifer Vargas Guerra, MA

Jennifer Vargas Guerra brings a decade of experience working in various eating disorder treatment settings to her role as the Director of Outreach & Admissions at Hidden River. Jennifer received her Master’s in Clinical Counseling Psychology from LaSalle University and began her career at an inpatient eating disorder program in Pennsylvania where she was a…