Our Team


Functional Medicine is a personalized, systems-oriented model that empowers patients and practitioners to achieve the highest expression of health by working in collaboration to address the underlying causes of disease.

Functional Medicine offers a powerful new operating system and clinical model for assessment, treatment, and prevention of chronic disease to replace the outdated and ineffective acute-care models carried forward from the 20th century. Functional Medicine incorporates the latest in genetic science, systems biology, and understanding of how environmental and lifestyle factors influence the emergence and progression of the disease.

Dr. Kara Fitzgerald

Kara Fitzgerald, ND IFMCP

Physician, Clinic Director

Dr. Kenneth Litwin received his medical degree from Allegheny University of the Health Sciences and has been in practice for 19 years. Dr. Litwin specializes in Internal Medicine.

Kenneth A. Litwin, MD FACP IFMCP


Stacey Cantor-Adkins MD, MS, IFMCP


Darisa Espinal

Darisa Espinal, ND, MS


Dr. Rachel Surprenant

Dr. Rachel Surprenant, ND IFMCP



All nutrition appointments are available remotely, conveniently fitting into your life and your schedule no matter where you are or what you’re doing.

All of our Functional Nutritionists are trained and experienced in Functional Medicine through our clinic and the Institute for Functional Medicine.

Your nutritionist will help you uncover the root causes of your issues, using detailed histories and functional laboratory testing (often included in your package), and create a highly-tailored Functional Medicine plan just for you. Our nutrition team also has the benefit of ready access to myself and Dr. Litwin during our weekly Clinical Grand Rounds, to consult on your case should that be needed.

Jessica Kovalchik, DC MS CNS LDN CDN


Melissa Parker, MS CNS CDN

Melissa Parker, MS CNS CDN


Miranda Kusi, MS CNS CDN

Miranda Kusi, MS CNS CDN


Front Desk/Office Admin Team

We have a fabulous, customer service driven team waiting to assist you.

Please do not hesitate to seek out support or guidance regarding any of your questions or concerns. We love to hear your compliments, too!

Rhonda is energetic, organized and motivated individual who handles all aspects of communication that leads and inspires everyone in the office at Sandy Hook.

Rhonda Timmons

Office Manager

Platform Team

Dr. Fitzgerald’s online platform is industry-leading and abuzz with activity!

With the goal of extending access to the best and latest healthcare information, our platform team works on everything from blogs, podcasts and newsletters, to virtual programs, educational events, media engagements, sponsorship opportunities, and more.

Josette Herdell

Josette Herdell, MS CNS LDN

Content Specialist

Romilly Hodges

Romilly Hodges, CNS CKNS CDN IFMCP

Programs Director

Miranda Kusi, MS CNS CDN

Miranda Kusi, MS CNS CDN

Marketing & Social Media