Meet The Providers
Sarah Fontaine, MSN, APRN, FNP-C
Co-founder
In 2013, Sarah graduated from University of Saint Joseph in West Hartford, Connecticut with a bachelors in nursing and minor in biology. She has practiced as a nurse in skilled nursing facilities, homecare, hospice and palliative care, and in hospital. She received her certification in hospice and palliative care in 2017. Sarah went back to school in 2017 where she received her masters degree in nursing specializing in family medicine. Since graduating as a family nurse practitioner, Sarah has worked in integrative medicine practicing functional medicine in primary care and specialty care including thyroid, BHRT, autoimmunity, tick borne disease, PCOS, MCAS, dysautonomia, root cause finding, and more. Sarah enrolled in The School of Applied Functional Medicine in 2021 where she is currently working towards her certification in functional medicine. Sarah believes in partnering with patients to achieve optimal health and avoiding disease processes before they even begin. Lifestyle changes, nutraceuticals, and herbs all can be used to reverse and prevent illness. Food is medicine. Outside the office, Sarah can be found caring for her 5 children and loving husband enjoying the outdoors, hiking, skiing, at church, baking, cooking, and studying. Sarah recieved the Natural Nutmeg 10best award for pediatric practitioner in CT 2026, 2025, 2024. Sarah is a co-founder of It is Well Integrative Partners. Sarah is currently accepting patients in primary care and for functional medicine evaluations with extensive testing.
Austin McCaslin, DNP, APRN, FNP-BC, PMHNP-BC
Co-founder
Austin graduated from Emory University with a Bachelor’s degree in Psychology and earned her Doctor of Nursing Practice from Sacred Heart University. She later completed her Psychiatric-Mental Health Nurse Practitioner (PMHNP) program at Spring Arbor University, becoming a dual-certified Family Nurse Practitioner and Psychiatric-Mental Health Nurse Practitioner. She continues to teach in the Master of Science in Nursing program at Goodwin University, where she is passionate about mentoring the next generation of nurse practitioners.
Clinically, Austin’s practice focuses on pediatrics and mental health, emphasizing a functional approach that integrates holistic and evidence-based care while maintaining balance and practicality for each patient and family.
Outside of her professional life, Austin is a spectrum mom, homeschool mom, and chicken mom, and she is active in her church community. She believes in balance, natural solutions before pharmacologic solutions when possible, and patient partnership. Austin believes strongly in supporting families, as they are the most important predictor of a child’s future. She is accepting patients of all ages for primary care and for mental health medication management, and works functional medicine into primary care appointments. Austin is a co-founder of It is Well Integrative Partners.
Erica Bencivenga, DNP, APRN, FNP-BC
Erica graduated from Southern Connecticut State University in New Haven, Connecticut with a bachelors in nursing. She joined the United States Navy Nurse Corps immediately upon graduation and served at Naval Hospital Jacksonville in Jacksonville, Florida and Branch Health Clinic Iwakuni in Iwakuni, Japan. While in the navy she was a labor and delivery nurse and was the clinic manager of a family practice Medical Homeport. Upon leaving the military and moving back to the United States, Erica went back to school in 2017 where she received her doctorate of nursing practice in family medicine from East Carolina University in Greenville, NC. In 2021, Erica and her family relocated back to Connecticut. Erica has worked in urgent care and pre-admission testing. She is passionate about breastfeeding, wellness for the family, reducing inflammation, nutrition, integrative and functional medicine. Movement and diet are foundational to preventing and managing disease. When Erica is not at work, she can be found spending time with her husband and three daughters, volunteering at church, homeschooling, baking bread, learning, and tending her garden and chickens.
Erica is accepting primary care patients of all ages.
Kelsey Staller, MSN, APRN, FNP-C
Kelsey is a board-certified Family Nurse Practitioner with a passion for providing holistic, patient-centered care. Her journey in healthcare began in 2016 as an EMT, where she developed a strong foundation in acute care. In 2020, she completed her Associate Degree in Nursing from Goodwin University, followed by a Bachelor of Science in Nursing in 2022. Through nursing school and as a registered nurse, Kelsey worked on Backus Hospitals' oncology unit where she found a growing desire to learn about integrative care and root cause medicine. After her time in acute care, she worked in primary care serving families. Since then, she was able to set her focus on functional medicine. In 2025, she would go on to complete her Master of Science in Nursing at Salve Regina University, specializing in family practice. She finds great satisfaction in supporting parents in informed decision making, through the perinatal season of life, and beyond. When she is not working, Kelsey enjoys spending time with her family, homeschooling, baking, listening to a good podcast, and being active in her church community.
Dana O'Sullivan, MSN, APRN, FNP-C
Coming soon....
What makes us different?
Integrative Approach
We recognize the benefits of natural approaches in healthcare, that food can both heal and harm, and that the human body is capable of incredible healing when appropriately supported.
Primary care for all ages
Pediatric through geriatrics patients are accepted. We participate with most major insurance groups including Husky. We have a new patient fee and a yearly fee for patients who do not have Husky insurance. The best way to become a new patient is signing the waitlist below.
Family Centered Care
We believe the family unit is a blessing. We are here to support and nurture families!
Patient Partnership
We believe the best outcomes happen when providers and patients work together to support patient specific outcomes and goals. Ultimately you call the shots when it comes to your health! We are here to help you understand risks, benefits, and evidence supported options. We do not believe in "one size fits all" healthcare.
Building a Community
We don't know exactly what this will look like yet, but we know this is an important goal for our practice.
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Faith-based Care
While we are a faith-based business, we accept and support patient of all religions and creeds. We hope our openness about our faith encourages our patients to share their faith with us as this is an integral part of health.
Testimonials
Services and Practice Information
We offer several levels of care and pay models
Extensive Testing and Collaboration
Functional medicine extensive testing: initial 1 hour appointment $300 follow up visit $200.
Functional Medicine extensive testing visits are not covered by insurance. If you are happy with your primary care, we can work with you and your primary care provider to optimize health.
Integrative Primary Care
We offer primary care for all ages and participate with all major insurance companies. We also offer a private pay model for primary care. Our practice charges a new patient fee and a yearly fee.
Classes and Community
Coming soon!
The best way to book with us: Sign up for our waitlist and we will reach out to you to schedule.
Contact Info
Phone
Address
T: 860-270-0506
F: 860-222-0381
282 Main St ext suite A3 Middletown, CT 06457