Welcome to NEFEDA St. Johns!

Diabetes and Thyroid Care with Compassion and Convenience.

Comfortable, Neighborhood-Focused Care

At NEFEDA’s St. Johns location just off State Road 210, our team is dedicated to bringing you expert endocrinology and diabetes care right in your own neighborhood. Our St. Johns office is designed with your comfort and convenience in mind.

Experienced and Caring Providers

Dr. Raquel Villavicencio and Dr. Firas Warda are committed to delivering the most advanced treatments while practicing patient-centered medicine. Their dedication ensures that you feel heard and empowered.

Meet the Experts Behind Your Care

Learn more about Dr. Villavicencio

Learn more about Dr. Warda

What We Offer at NEFEDA St. Johns

Diabetes Management

Effective, personalized diabetes care focused on blood sugar control, complication prevention, and long-term health.

Thyroid Disorders & Hormone Regulation

Expert diagnosis and treatment for thyroid disease and hormone imbalance to restore energy, mood, and metabolic function.

Endocrine Health & Metabolic Care

Comprehensive evaluation and treatment for adrenal, pituitary, and metabolic disorders to optimize overall endocrine health.

Medically-Guided Weight Loss

Endocrine-based obesity and weight-loss management solutions using proven therapies, nutrition guidance, and sustainable lifestyle support.

Long-Term Disease Education & Management

Clear education, ongoing support, and proactive monitoring to help patients manage chronic endocrine conditions with confidence.

Patient-Centered, Responsive Care

No matter your health journey or stage — whether newly diagnosed or managing a long-term condition — we meet you where you are and help you take every step forward.

Meet Our Providers

Expert Care. Real Progress.

“Dr. Villavicencio took time to answer all my questions and shared her ideas of what could possibly help my circumstances. She showed sincere interest and patience. She was great and I’ll look forward to my progress under her care.”
Patient Survey Response

“Very pleased with Dr. Warda. His treatment plan has been extremely successful, and he and staff are always there when I have needed help.”
Patient Survey Response

“After my visit, I received a call to make sure that I understood how to take my medications. I don’t remember when a doctor’s office has ever done that!”
Patient Survey Response

“You’ve done more for me in 9 months of treatment as a diabetic than any other doctor in the previous 25 years.”
Patient Survey Response

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Your Partners in Hormone and Metabolic Wellness

Raquel Villavicencio, M.D.

Dr. Raquel Villavicencio is triple-board-certified in Endocrinology, Internal Medicine, and Obesity Medicine. She previously served as a primary care physician, hospitalist, and preoperative assessment practitioner. Dr. Villavicencio is a member of the Endocrine Society and the Menopause Society. She also earned a Certificate in Comprehensive Care for Persons with Diabetes from the Endocrine Society and is a certified Prevent T2 lifestyle coach. Dr. Villavicencio speaks English and Spanish.

Firas Warda, M.D.

Dr. Firas Warda, born in Syria, moved to Jacksonville in 2005. He earned his degree from St. George’s University School of Medicine. Dr. Warda completed training in Internal Medicine and Endocrine at the University of Florida College of Medicine, Jacksonville. Dr. Warda is an active contributor to clinical research at UF, has presented at national endocrinology conferences and has published numerous papers in national and international journals. Dr. Warda is known for providing compassionate care.

Learn More About Our Providers

Get In Touch

St. Johns Office
300 Saint Elizabeth Way,

Suite 160,
St. Johns, FL 32259

Phone: 904-384-2240

Fax: 904-486-2314

NEFEDA Office Hours

Monday – Thursday

8:00 a.m. – 5:00 p.m.

Friday

8:00 a.m. – 4:00.p.m.

Reach Out to NEFEDA Today.

NEW PATIENTS:
Please call us at 904-384-2240 to request an appointment.

New Patient Information

EXISTING PATIENTS:
Please use our Patient Portal to request appointments or refills, pay a bill or send us a message. First-time users, signup for portal registration below. *All fields are required.