Serving North Dade County, Coral Gables, West Dade and Broward County.

Your Physician-Owned
Gastroenterology Group

Not owned by any corporation or hospital group.
Do not pay hospital prices.

Equipped with 5 Medical Offices and 2 Ambulatory Surgery Centers across South Florida, all of our physicians are board-certified and use innovative equipment to deliver precise, high-quality digestive health services.

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We maintain flexible scheduling to accommodate new and existing patients.

Request Appointment

Click below to make an appointment directly with the office location of your choice.

Services & Conditions

Enjoy full-service gastroenterology care from a friendly team of experts.

What Sets Our Group Apart?

Unlike many endoscopy centers, our facilities are independent rather than hospital-owned, helping reduce out-of-pocket costs. We also use advanced AI-assisted technology to enhance your experience while in our care.

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Medical Expertise

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Patient Experience

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Accessibility

Dr. Joel Kertznus and Dr. Francisco R. Maderal

5 Medical Offices &
2 Ambulatory Surgery Centers

ASC Building-outside
Hialeah/Miami Lakes

2140 W. 68th St., Suite 300
Hialeah, FL 33016
Call 305-822-4107

Coral Gables, FL location
Coral Gables

3133 Ponce de Leon Blvd
Coral Gables, FL 33134
Call 305-822-4107

Pembroke Pines, FL location
Pembroke Pines

18044 NW 6 St. Suites 102 & 104
Pembroke Pines, FL 33029
Call 305-822-4107

N-Kendall Dr Miami FL-Building
Miami / Kendall

11410 North Kendall Drive, Suite 311
Miami, FL 33176
Call 305-822-4107

3650-NW-82nd-Ave Doral FL-Building
Doral

3650 NW 82nd Ave, Suite 506
Doral, FL 33166
Call 305-822-4107

ASC Building-outside
Palmetto Surgery Center

2140 W 68th Street, Suite 102
Hialeah, FL 33016
Call 305-822-4107

SURGERY CENTER OF MIAMI
Surgery Center of Miami

21 SW 57th Ave
Miami, FL 33144
Call 305-822-4107

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Get In Touch

Mon-Thur: 8am-5:30pm / Fri: 8am-4pm
FAX: 305-822-5086
Call 305-822-4107

The Board-Certified Physicians

We place a strong emphasis on patient-physician communication and will listen to you, answer your questions and return your phone calls.

Dr. Francisco R. Maderal - Digestive Medicine Associates

Francisco R. Maderal, MD

Gastroenterology

OFFICE LOCATIONS:

Hialeah • Pembroke Pines
Works with Vanessa Diaz, PA-C

Dr. Jeff O. González - Digestive Medicine Associates

Jeff O. González, MD

Gastroenterology

OFFICE LOCATIONS:

Coral Gables • Hialeah • Doral
Works with Nilda Herrera, APRN

Dr. Joel Kertznus - Digestive Medicine Associates

Joel Kertznus, MD

Gastroenterology & Hepatology

OFFICE LOCATIONS:

Coral Gables • Hialeah • Doral • Pembroke Pines
Works with Maibys Molina, APRN

Dr. Jorge D. Castañeda - Digestive Medicine Associates

Jorge D. Castañeda, MD

Gastroenterology

OFFICE LOCATIONS:

Coral Gables • Hialeah
Works with Diane Garrido-Tancredi, APRN

Dr. Jose L. Martinez - Digestive Medicine Associates

Jose L. Martinez, MD

Gastroenterology

OFFICE LOCATIONS:

Coral Gables • Hialeah • Kendall
Works with Massiel Ruiz, APRN

Dr. Victor M. Padilla - Digestive Medicine Associates

Victor M. Padilla

Gastroenterology

OFFICE LOCATIONS:

Coral Gables • Hialeah
Works with Nelson Santana, APRN

Dr. Juan Pablo Blum Guzmán - Digestive Medicine Associates

Juan Pablo Blum Guzmán, MD

Gastroenterology & Hepatology

OFFICE LOCATIONS:

Hialeah • Pembroke Pines
Works with Jessica Garcia, APRN

Vanessa Mendez, MD

Gastroenterology

OFFICE LOCATIONS:

Hialeah • Pembroke Pines
Works with Jessica Garcia, APRN

Nisa Desai, MD

Gastroenterology

OFFICE LOCATIONS:

Jennifer Spiegel, MD

Pathology

OFFICE LOCATIONS:

Maibys Molina - Digestive Medicine Associates

Maibys Molina, ARNP

Nurse Practitioner

Diane Garrido-Tancredi - Digestive Medicine Associates

Diane Garrido-Tancredi, ARNP

Nurse Practitioner

Nelson Santana

Nelson Santana, ARNP

Nurse Practitioner

Nilda Herrera

Nilda Herrera, ARNP

Nurse Practitioner

Massiel Ruiz

Massiel Ruiz, APRN

Nurse Practitioner

Jessica Garcia

Jessica Garcia, APRN

Nurse Practitioner

Vanessa Diaz

Vanessa Diaz, PA-C

Physician Assistant

Featured Services & Conditions Treated

Most procedures are performed in an office-based setting, providing a calm, private, and more relaxing environment compared to a traditional hospital. This approach allows patients to complete their procedure comfortably and return home the same day with minimal disruption to their routine.

Colonoscopy

Colonoscopy screens for colorectal cancer and removes precancerous polyps. It is a safe and effective preventive procedure.

Gastroscopy

This procedure evaluates the esophagus, stomach, and upper intestine. It helps identify the cause of upper digestive symptoms.

Hemorrhoids

Hemorrhoids can cause pain, itching, or bleeding. Treatment focuses on effective, minimally invasive solutions.

Irritable Bowel Syndrome (IBS)

IBS causes abdominal discomfort and changes in bowel habits. Care is tailored to relieve symptoms and improve daily function.

Ulcerative Colitis

Ulcerative colitis is chronic inflammation of the colon. Treatment aims to control symptoms and maintain remission.

Crohn’s Disease

Management of Crohn’s Disease often focuses on reducing flares and maintaining long-term control.

Liver Disease

Liver disease isn’t just one particular ailment but refers to a whole variety of medical problems that impacts liver function.

Indigestion / Bloating / Gas

Ongoing indigestion, bloating, or gas may indicate an underlying issue. Evaluation helps guide targeted treatment.

Acid Reflux

Swallowing problems and acid reflux can signal esophageal conditions. Diagnostic testing helps direct effective treatment.

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Integrated Care With Compassion

Digestive Medicine Associates’ team is committed to excellence in patient care and the development of lifelong relationships with the residents and visitors of North Dade County, Coral Gables, West Dade and Broward County.

Unlike many larger healthcare systems, we prioritize direct interaction between patients and their physician, ensuring clear communication and continuity of care. 

Explore Patient Resources

Doctors - Digestive Medicine Associates
Appointment Information

Ensuring Better Outcomes & Peace of Mind

We will take extra care to listen to your concerns, answer all your questions and thoroughly explain your condition and treatment options. To schedule an appointment, please call us at 305-822-4107 or click below to get started.

Research

Our Gastroenterology Blog

Rooted in dignity, justice, service, innovation, and excellence, we treat every patient as a person — not a chart.

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New patient intake

Preparation Instructions

If you have made your initial appointment, you can prepare by clicking on the links below to for further instructions.

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clinical care

Insurance & Billing

Patients will be responsible for full payment of any co-payments, co-insurance ,and deductibles required by their insurance.

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Office-Based Endoscopic Procedures

By performing procedures in-office, patients avoid costly hospital facility fees, which can often reach thousands of dollars, while receiving a thorough preoperative review of their medical history, medications, and individual needs.We hold ourselves to the highest of standards, as the Palmetto Surgery Center is both Medicare-approved and accredited by the Accreditation Association for Ambulatory Health Care (AAAHC).

Locations Across South Florida
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