With Dr. Marina Fest, you receive care that blends clinical expertise with a deeper, root-cause approach to health. The advanced clinical training, diagnostic insight, and safety of a Doctor of Nursing Practice integrated with systems-based Functional Medicine designed to uncover why symptoms occur. Grounded in science, guided by experience never trends or guesswork.
- Serving NY & FL (In-Person & Telehealth)
- Over 10 years experience in medicine
- ROOT-CAUSE, PERSONALIZED CARE
Meet Your Provider
Meet Dr. Marina Fest, DNP
Dr. Marina Fest is a Doctor of Nursing Practice with extensive experience in primary care and advanced training in functional medicine. Her approach combines evidence-based clinical medicine with a root-cause philosophy — helping patients understand not only what is happening in their bodies, but why.
After years in traditional healthcare, Dr. Fest recognized that many chronic symptoms remain unresolved when care focuses only on managing diagnoses. Her functional medicine approach looks deeper, evaluating digestion, hormones, metabolism, inflammation, and lifestyle factors to uncover the true drivers of health concerns.
Dr. Fest partners closely with her patients to create personalized, science-based care plans designed to restore energy, improve digestion, balance hormones, support healthy weight, and optimize long-term wellness. Her goal is not temporary improvement, but sustainable health and lasting results.
Patients appreciate her thoughtful, collaborative style and her commitment to listening, educating, and guiding them through a clear path forward.
This practice is for individuals who know something doesn’t feel right — and want real answers, not reassurance that everything is “normal.”
With me, you get the best of both worlds:
– The clinical training, diagnostic skill, and safety of a Doctor of Nursing Practice
– Combined with root-cause, systems-based Functional Medicine strategies
– All grounded in science, not trends or guesswork
My goal is simple:
to help you understand your body, connect the dots, and finally move from feeling stuck to feeling well—with a plan that actually makes sense.
This isn’t alternative medicine.
It’s informed, personalized, root-cause care—with a medical professional who knows when to dig deeper and when to use conventional tools.
When symptoms don't have answers, we look deeper.
Do You Feel…
Stressed — and unable to fully relax?
Struggling with weight — despite eating well and exercising?
If so, you're not alone.
Many patients are told everything looks "fine," yet they still don't feel like themselves.
At Dr. Marina Fest Functional Medicine, we look beyond surface-level symptoms to uncover the root cause.
Common Underlying Causes May Include:
- Hormone imbalances
- Gut dysfunction
- Nutrient deficiencies
- Chronic inflammation
- Blood sugar instability
- Thyroid dysfunction
- Stress and cortisol dysregulation
Our Approach Is Different
Instead of masking symptoms, Dr. Fest:
- Performs advanced lab testing
- Reviews lifestyle and environmental factors
- Evaluates gut and hormone health
- Creates a personalized treatment plan
- Uses targeted supplementation and nutrition
- Focuses on long-term healing — not temporary fixes
You Deserve Answers
If you've been told "everything is normal" but you still feel:
- Exhausted
- Foggy
- Overwhelmed
- Stuck with your weight
- Off-balance hormonally
It may be time to look deeper.
Book a Functional Medicine Consultation today.
Schedule Your ConsultationA Root-Cause, Systems-Based Approach to Healing
Dr. Fest's Functional Medicine Process
Dr. Fest practices Functional Medicine with a focus on identifying and correcting the underlying causes of disease rather than simply managing symptoms. Her approach is structured, data-driven, and deeply personalized.
Comprehensive Functional Evaluation
Every patient begins with an in-depth consultation that explores:
- Detailed medical history
- Lifestyle and stress factors
- Environmental influences
- Digestive and hormonal health
- Prior lab work and diagnoses
This comprehensive assessment allows Dr. Fest to understand the full picture not just isolated symptoms.
Advanced Diagnostic Testing
When clinically appropriate, specialized functional testing may be recommended, including:
- GI-MAP microbiome analysis
- Comprehensive hormone panels
- Micronutrient testing
- Inflammatory and immune markers
These tools provide objective data to uncover imbalances that conventional labs may overlook.
Personalized Root-Cause Protocol
Based on findings, Dr. Fest develops a customized treatment plan tailored to each patient’s biology. Plans may include:
- Targeted nutritional strategies
- Precision supplementation
- Gut restoration protocols
- Hormone optimization
- Lifestyle and stress modulation
There are no generic treatment templates each protocol is individualized.
Strategic Monitoring & Optimization
Healing is a process, not a quick fix. Patients receive ongoing support with:
- Progress tracking
- Protocol adjustments
- Follow-up testing when needed
- Education to build long-term resilience
The goal is sustainable health, improved vitality, and measurable outcomes.
Services
Healthcare Services Designed for Your Needs
Customer Choice
Why choose us
Why Choose Functional Medicine
- Doctoral-Level Clinical Expertise Our practice is led by a Doctor of Nursing Practice with advanced training in functional medicine and evidence-based treatment protocols.
- Root Cause Analysis & Treatment We combine conventional diagnostics with functional medicine testing to identify and address the underlying causes of your health concerns, not just manage symptoms.
- Comprehensive, Individualized Treatment Plans Each patient receives a thorough evaluation and a customized care plan based on their unique health history, lab results, and treatment goals.
- Continuity of Care in Your Community We provide ongoing clinical support and monitoring to ensure sustainable health outcomes, with convenient access to care when you need it.
Featured Testing
Advanced GI-MAP Testing
Uncover the root cause of digestive issues, chronic fatigue, and systemic inflammation with our advanced DNA-based gut microbiome analysis. Dr. Fest uses the GI-MAP to create personalized treatment protocols tailored to your unique biology.
WHO THIS IS FOR
Is This Right For You?
- Want deeper answers, not quick fixes
- Feel unheard despite "normal" labs
- Value personalized, concierge-style care
- Are ready to invest in your long-term health
- One-time visits without follow-up
- Prescription-only solutions
- Rushed appointments
Customer Choice
COMMON AREAS WE HELP
Common Areas and Symptoms We Help
We take a comprehensive approach to relieving chronic pain, offering a range of safe and effective treatment options delivered by our experienced team. Our areas of focus include:
- Persistent fatigue or low energy
- Hormonal imbalance or mood changes
- Digestive or gut-related symptoms
- Thyroid or metabolic concerns
- Brain fog or chronic inflammation
- Weight resistance despite diet/exercise
- Perimenopause or menopause symptoms
Happy Clients
Hormone, Thyroid & Metabolic Optimization
Patient Testimonials on WebMD
See what our patients are saying
Request An Appointment
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What does a functional medicine doctor do?
Is functional medicine the same as primary care?
Functional medicine is different from primary care. While primary care focuses on diagnosing and treating acute conditions and managing chronic diseases, functional medicine offers deeper evaluation and personalized strategies for patients who want more insight into root causes and optimization of their health.
Please note that functional medicine services are out-of-pocket only and we do not accept insurance.