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Woman in Water

We provide personalized functional medicine, IV therapy, and wellness treatments for lasting vitality.

True transformation starts when you support your body with what it needs most—care, balance, and the space to heal naturally.

Who We Help

At RxFit Functional Medicine, we support individuals who want to feel healthier, clearer, and more energized in their daily lives. Many of our patients are navigating fatigue, hormone changes, stubborn weight gain, stress, inflammation, or a sense that their body just isn’t operating the way it used to. Whether you’re moving through peri-menopause, menopause, andropause, or simply wanting to restore balance and vitality, you’ll find a supportive place here to understand what’s happening in your body and what it needs to thrive.

Why Choose Us

Choosing a wellness provider is an important decision, and you deserve care that’s personal, thoughtful, and rooted in real science.

Patients come to RxFit Functional Medicine because we offer:

  • Compassionate, patient-centered care in a comfortable and welcoming environment

  • A licensed Nurse Practitioner who listens deeply and treats the whole picture, not just the symptoms

  • Functional medicine supported by advanced lab testing to uncover root causes

  • Personalized treatment plans using IV therapy, hormone optimization, peptides, and lifestyle guidance

  • Flexible appointment options, including in-person and telehealth for Massachusetts residents

 

We believe lasting wellness begins with understanding — and we’re here to support you every step of the way.

Our Approach

Our approach is grounded in functional medicine, science-backed treatments, and genuine partnership with our patients. We take the time to understand your symptoms, lifestyle, and goals, then use comprehensive lab work to get clear answers about what your body needs. From there, we create an individualized plan that may include IV infusions, hormone replacement, peptides, supplements, and practical lifestyle shifts. Every recommendation is designed to restore balance, increase energy, and support long-term wellbeing — all at a pace that feels manageable and aligned with your life.

Our Services

We offer a range of personalized medical and wellness services designed to support your health from the inside out. Each service is created with intention — whether you’re looking to address specific concerns or take a more comprehensive approach to your wellbeing.

Some services can be scheduled directly, while others require a consultation before getting started. You’ll find clear details on each service page to help you understand what’s included, what’s required, and what to expect next.

Explore the services below to learn more, or visit our Services Overview page for a deeper look at how our care is designed to support you.

Hormone Replacement Therapy

Functional Medicine

Re-Hydrate Infusion

Immune Booster Infusion

Weight loss Mixture Infusion

Energy & Detox Boost Infusion

Mini Hydrate Infusion

NAD+ Injection

Semaglutide Weight Loss Program

Peptides Therapy

Gina is very caring and gentle. She explains everything that she is going to do. She even has a foot massager for you to enjoy while getting your infusion.

Denette L

Meet the Team

At RxFit Functional Medicine, our team is dedicated to helping you feel healthier, stronger, and more in tune with your body. We bring together compassionate professionals who combine medical expertise with a genuinely caring approach, creating a space where you can ask questions openly, feel heard, and receive guidance that truly fits your life.

Every member of our team is committed to addressing the root causes of your symptoms and supporting your wellbeing from the inside out. Whether you’re seeking more energy, better balance, improved mood, or long-term vitality, we’re here to walk with you through each step of your wellness journey — with clarity, encouragement, and personalized care.

Explore our team profiles and get to know the people who will be partnering with you on your path to better health.

Marielle Pitts

Marielle Pitts

Owner/Nurse Practitioner

I’ve been a fully-certified Nurse Practitioner since 2012.  I started my work in primary care and transitioned to long term care in 2015.  I started to get frustrated with the traditional healthcare system which was not really getting people healthier.  I found functional medicine in 2019 and found significant relief in my own health as well as the lives of my patients.  I was finally getting patients healthier by treating them at the root cause for their conditions instead of giving band-aid fixes that weren't working.  


RxFit Functional Medicine & Wellness Infusions was born from my experiences with functional medicine and seeing the need for vitamin therapy, hormone replacement, GLP1s, and peptides in treating illness and chronic disease.   I had so many of my patients telling me they weren't able to get the treatment they so desperately needed either because of insurance or provider issues.  I knew I could offer these treatments and manage them better because of my experience and specialization in these treatments.  Seeing my patients happy and thriving on their treatment regimen is what really gets me excited about the work I do!!​


I am specialized in functional medicine, bio-identical hormone replacement therapy, GLP1, peptides and botox!

Regina Dunn

Regina Dunn

RN

I began my nursing career after graduating from the Framingham Union School of Nursing in 1989, followed by earning my bachelor’s degree from Worcester State University in 1991. Over the years, I’ve built extensive clinical experience across multiple settings, including six years in the ICU, a year in management, and a long-standing career in emergency medicine, where I’ve worked since 1996.


In addition to my clinical work, I have a deep passion for education. I’ve been an educator with MetroWest Medical Center since 1997, primarily supporting the Emergency Department, and expanded to hospital-wide education in 2023. I also became a clinical instructor at Regis College in September and continue to enjoy mentoring and supporting the next generation of nurses. Currently, I am pursuing certification in nurse coaching with a focus on holistic nursing, reflecting my belief in caring for the whole person, not just symptoms.


At Rx Functional Medicine, I’m proud to be part of a team that values thoughtful, patient-centered care and supports individuals through personalized wellness plans. I enjoy working in an environment where education, experience, and compassion come together to help patients feel informed, supported, and empowered.


Outside of work, I love spending time outdoors and traveling with my husband. Some of my favorite moments are spent up in Maine by the lake. You can usually find me at the gym most mornings—except Sundays, which I reserve for rest and recovery.

Jill Paulino

Jill Paulino

LPN

I became a nurse in 2020 after graduating from the LPN program at Tri-County Regional Vocational Technical High School in Franklin. I began my career in long-term and rehabilitative care, where I served as both a charge nurse and later a nursing supervisor at Lydia Taft. These roles gave me hands-on experience caring for patients with complex needs and taught me the importance of thoughtful, consistent, and compassionate care.


Today, I work in home care with Salmon VNA and am proud to support patients at Rx Functional Medicine as an infusion nurse. I work closely with Marielle to carry out individualized treatment plans, ensuring each patient feels comfortable, informed, and well-cared for throughout their wellness journey. I enjoy being part of a team that focuses on proactive, personalized care and truly supports patients in feeling their best.


Outside of work, I love spending time with my family and my dogs. I enjoy hiking, fishing, and being outdoors whenever possible—especially near the water. Some of my favorite places to visit are Cape Cod and Florida, where I can relax and recharge.

Insurance & Rates (Nurse Practitioner visits)

We accept insurance for Nurse Practitioner visits only, such as consultations, labs, and follow-up appointments. All wellness treatments are private pay. Please see below for accepted insurance plans and payment options.

Aetna
Blue Cross Blue Shield
Cigna
Medicare
Tufts
United Healthcare

Our Rates & Private Pay Options

If you prefer not to use insurance—or if your plan is not in-network—you’re always welcome to pay privately for your care. Please note that insurance is accepted only for visits with our Nurse Practitioner, including initial consultations, lab reviews, and follow-up medical visits.

Many of our wellness services—such as IV infusions, peptide therapy, bio-identical hormone treatments, and other non-covered therapies—are offered on a private pay basis. These services are personalized and not typically covered by insurance plans. Many patients choose private pay for the added flexibility, privacy, and access to treatments that best support their individual wellness goals.

Payment is due at the time of service. We accept major credit cards, HSA/FSA cards, and other common payment methods.

If you have questions about rates, insurance coverage, or private pay options, our team is happy to walk you through the details and help you understand what to expect before scheduling.

Title
Duration
Rate
Initial Consultation
60 minutes
$199
Lab Work
60 minutes
$125
Follow-up Consultation
60 minutes
$125

Business Info

At RxFit Functional Medicine we provide personalized functional medicine, IV therapy, hormone replacement, and wellness treatments designed to restore balance, energy, and vitality from the inside out.

Visit Us

RxFit Functional Medicine

47 Sumner Street

Milford, MA -1787

Email: marielle.rxfitness@gmail.com
Phone: (774) 231-0846

Contact us

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