Skip to main content

Best Gastroenterologists in Fontana

Written by Andrew Le, MD

Updated December 24, 2024

Introduction to Gastroenterology in Fontana

Overview of Gastroenterology

Gastroenterology is a medical specialty focused on the digestive system and its disorders. In Fontana, California, gastroenterologists play a significant role in diagnosing and treating various conditions affecting the gastrointestinal tract, liver, and pancreas.

Gastroenterologists in Fontana commonly treat conditions such as inflammatory bowel disease, gastroesophageal reflux disease (GERD), peptic ulcers, and colorectal cancer. They also perform important screening procedures like colonoscopies.

Importance of Choosing the Right Gastroenterologist

Selecting an experienced and skilled gastroenterologist is essential for accurate diagnosis and effective treatment of digestive disorders. The right specialist can significantly improve patient outcomes and quality of life.

Gastroenterologists also play a key role in preventive care, particularly in colorectal cancer screening. Regular check-ups and timely interventions can help detect and prevent serious gastrointestinal issues.

Gastroenterology Services in Fontana

Fontana boasts a diverse group of gastroenterologists, including highly rated specialists like Dr. Michael Chan, Dr. Timothy Kuo, and Dr. Tommy Oei. These professionals offer a range of services to address various digestive health concerns.

Many gastroenterologists in Fontana are affiliated with respected healthcare facilities such as Kaiser Permanente Fontana Medical Center, ensuring access to comprehensive care and advanced medical resources.


⚡️ Powered by AI

What's the fastest way to connect to gastroenterologists?

Our clinically-backed AI will ask you questions and provide an answer specific to your unique health situation.


List of Gastroenterologists in Fontana

PH

Dr. Patricia Hsia

5.0

Fontana, CA

Sex

Female

Languages

English

Phone

(909) 427-5000

American Board of Internal Medicine

Francis Scott Key Medical Center (Residency Hospital, 1988)

Georgetown U/Va Medical Center (Fellowship Hospital, 1988)

New York State U, School of Medicine - Buffalo (Medical School, 1985)

English

Kaiser Permanente Fontana Medical Center

Internal Medicine

Gastroenterology

MC

Dr. Michael Chan

5.0

Fontana, CA

Sex

Male

Languages

English

Phone

(909) 427-5000

American Board of Internal Medicine

UNIVERSITY OF SOUTHERN COLORADO (Medical School, 2006)

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

Internal Medicine

TK

Dr. Timothy Kuo

5.0

Fontana, CA

Sex

Male

Languages

English, Mandarin

American Board of Internal Medicine

Boston University (Medical School, 1999)

English

Mandarin

Kaiser Permanente Fontana Medical Center

Gastroenterology

BV

Dr. Blanca Viramontes

5.0

Fontana, CA

Sex

Female

Languages

English

Phone

(909) 427-3910

HARVARD Medical School (Medical School, 1995)

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

TO

Dr. Tommy Oei

5.0

Fontana, CA

Sex

Male

Languages

English

Phone

(909) 427-3910

American Board of Internal Medicine

New York University Grossman School of Medicine (Medical School, 1997)

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

NP

Dr. Nehali Patel

5.0

Fontana, CA

Sex

Female

Languages

English

Phone

(909) 427-5000

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

DS

Dr. Daniel Seid

5.0

Fontana, CA

Sex

Male

Languages

English

Phone

(909) 427-5231

American Board of Internal Medicine

VA Hospital (Residency Hospital, 1990)

UC-Irvine (Fellowship Hospital, 1990)

Saint Louis University School of Medicine (Medical School, 1987)

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

JR

Dr. Joseph Ruan

4.0

Fontana, CA

Sex

Male

Languages

English

Phone

(909) 427-5000

American Board of Colon & Rectal Surgery

American Board of Surgery

Loma Linda University (Residency Hospital, 2009)

USC (Fellowship Hospital, 2009)

English

Kaiser Permanente Fontana Medical Center

General Surgery

Colorectal Surgery

DN

Dr. Deborah Negusse

3.7

Fontana, CA

Sex

Female

Languages

English

Phone

(909) 920-0444

American Board of Internal Medicine

UNIVERSITY OF SOUTHERN COLORADO (Medical School, 2004)

English

Casa Colina Hospital

Gastroenterology

JY

Dr. Janet Yang

3.0

Fontana, CA

Sex

Female

Languages

English

Phone

(888) 750-0036

NEW YORK Medical College (Medical School)

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

PS

Dr. Paurush Shah

3.0

Fontana, CA

Sex

Male

Languages

English

Phone

(562) 869-1070

American Board of Internal Medicine

English

Gastroenterology

ZS

Dr. Zhigang Song

2.0

Fontana, CA

Sex

Male

Languages

English

Phone

(909) 724-5000

American Board of Internal Medicine

Shandong Medical College (Medical School)

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

Dr. Niloy Samadder

Dr. Niloy Samadder

1.0

Fontana, CA

Sex

Male

Languages

English

Phone

(480) 933-6836

Mayo Grad School Med/Mayo Fndn (Residency Hospital)

Medical College of Wisconsin (Medical School, 1988)

English

Mayo Clinic Hospital

Gastroenterology

Genetics

RY

Dr. Robert Yuhan

N/A

Fontana, CA

Sex

Male

Languages

English

Phone

(909) 427-5000

American Board of Colon & Rectal Surgery

American Board of Surgery

Cook Co Hospital (Fellowship Hospital, 1996)

University Ill Medical Center (Internship Hospital, 1991)

Northwestern University Feinberg School of Medicine (Medical School, 1990)

English

Kaiser Permanente Fontana Medical Center

General Surgery

Colorectal Surgery

EK

Dr. Eve Kirschner

N/A

Fontana, CA

Sex

Female

Languages

English

Phone

(909) 427-3910

American Board of Internal Medicine

City University of New York School of Medicine (Medical School, 1981)

English

Gastroenterology

Internal Medicine

OC

Dr. Onki Cheung

N/A

Fontana, CA

Sex

Female

Languages

English

Phone

(888) 750-0036

American Board of Internal Medicine

UMDNJ Rbrt Wood Johnson Medical School (Residency Hospital, 2001)

University Pittsburgh Medical Center (Fellowship Hospital, 2001)

UMDNJ Rbrt Wood Johnson Medical School (Internship Hospital, 1999)

State University of New York Upstate Medical University Norton College of Medicine (Medical School, 1998)

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

DK

Dr. David Kestenbaum

N/A

Fontana, CA

Sex

Male

Languages

English

Phone

(909) 427-5000

American Board of Internal Medicine

George Washington University School of Medicine & Health Sciences (Medical School, 1974)

English

Gastroenterology

FC

Dr. Frank Chen

N/A

Fontana, CA

Sex

Male

Languages

English

Phone

(909) 427-5000

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

AH

Dr. Alexander Han

N/A

Fontana, CA

Sex

Male

Languages

English

Phone

(888) 750-0036

USC University Hospital (Fellowship Hospital, 2008)

Montefiore Medical Center - Moses Division (Internship Hospital, 2006)

Northwestern University Feinberg School of Medicine (Medical School, 2005)

English

Kaiser Permanente Fontana Medical Center

Internal Medicine

Gastroenterology

JY

Dr. Joseph Yeh

N/A

Fontana, CA

Sex

Male

Languages

English

Phone

(833) 574-2273

American Board of Internal Medicine

University of Maryland School of Medicine (Medical School, 2008)

English

Kaiser Permanente Fontana Medical Center

Kaiser Permanente Baldwin Park Medical Center

Gastroenterology

JH

Jessica Hong

N/A

Fontana, CA

Sex

Female

Languages

English

Phone

(909) 427-5000

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

EM

Dr. Evan Mosier

N/A

Fontana, CA

Sex

Male

Languages

English

Phone

(909) 427-5989

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

SM

Dr. Scott Marnoy

N/A

Fontana, CA

Sex

Male

Languages

English

Phone

(909) 427-5000

American Board of Internal Medicine

Cedars Sinai Medical Center (Internship Hospital, 1984)

Tufts University School of Medicine (Medical School, 1983)

English

Kaiser Permanente Fontana Medical Center

Gastroenterology

Internal Medicine

Overview of Gastroenterologist Selection in Fontana

Factors to consider when choosing a gastroenterologist

Credentials and board certifications

  • Review American Board of Internal Medicine certifications
  • Consider additional specializations or fellowships

Experience and specializations

  • Evaluate years of practice and areas of expertise
  • Consider subspecialties within gastroenterology

Hospital affiliations

  • Note predominant affiliation with Kaiser Permanente Fontana Medical Center
  • Consider accessibility and quality of affiliated hospitals

Patient ratings and reviews

  • Examine star ratings on platforms like Healthgrades
  • Consider the number of reviews for a more accurate representation

Resources for finding gastroenterologists in Fontana

Online directories and rating websites

  • Utilize Healthgrades for comprehensive doctor profiles
  • Compare information across multiple platforms for a balanced view

Referrals from primary care physicians

  • Consult with your primary care doctor for personalized recommendations
  • Discuss your specific gastroenterological needs and preferences

Insurance provider networks

  • Check with your insurance company for in-network gastroenterologists
  • Verify coverage details for specific procedures and treatments

Top-Rated Gastroenterologists in Fontana

Dr. Michael Chan

Highlights

  • 5.0-star rating with 51 reviews
  • Board-certified by the American Board of Internal Medicine
  • Specializes in Gastroenterology and Internal Medicine

Education and Experience

  • Medical School: University of Southern Colorado (2006)
  • Languages: English

Practice Information

  • Hospital Affiliation: Kaiser Permanente Fontana Medical Center
  • Contact: (909) 427-5000

Dr. Timothy Kuo

Highlights

  • 5.0-star rating
  • Board-certified by the American Board of Internal Medicine
  • Multilingual: Fluent in English and Mandarin

Education and Experience

  • Medical School: Boston University (1999)
  • Specializes in Gastroenterology

Practice Information

  • Hospital Affiliation: Kaiser Permanente Fontana Medical Center

Dr. Tommy Oei

Highlights

  • 5.0-star rating
  • Board-certified by the American Board of Internal Medicine
  • Graduated from a prestigious medical school

Education and Experience

  • Medical School: New York University Grossman School of Medicine (1997)
  • Specializes in Gastroenterology

Practice Information

  • Hospital Affiliation: Kaiser Permanente Fontana Medical Center
  • Contact: (909) 427-3910

Dr. Patricia Hsia

Highlights

  • 5.0-star rating
  • Board-certified by the American Board of Internal Medicine
  • Extensive medical training and experience

Education and Experience

  • Medical School: New York State U, School of Medicine - Buffalo (1985)
  • Residency: Francis Scott Key Medical Center (1988)
  • Fellowship: Georgetown U/Va Medical Center (1988)
  • Specializes in Internal Medicine and Gastroenterology

Practice Information

  • Hospital Affiliation: Kaiser Permanente Fontana Medical Center
  • Contact: (909) 427-5000

Dr. Daniel Seid

Highlights

  • 5.0-star rating
  • Board-certified by the American Board of Internal Medicine
  • Over 30 years of experience in the field

Education and Experience

  • Medical School: Saint Louis University School of Medicine (1987)
  • Residency: VA Hospital (1990)
  • Fellowship: UC-Irvine (1990)
  • Specializes in Gastroenterology

Practice Information

  • Hospital Affiliation: Kaiser Permanente Fontana Medical Center
  • Contact: (909) 427-5231

Additional Resources for Finding the Right Gastroenterologist

Questions to ask during a consultation

Experience with specific conditions

  • Inquire about the doctor's experience treating your specific digestive issues
  • Ask about their approach to common gastroenterological procedures

Treatment approaches and philosophies

  • Discuss their preferred treatment methods for various conditions
  • Ask about their stance on alternative or complementary therapies

Availability and communication preferences

  • Inquire about typical wait times for appointments
  • Ask about their policy for addressing patient questions between visits

Importance of personal comfort and rapport

Communication style

  • Assess if the doctor's communication style aligns with your preferences
  • Consider how well they explain complex medical information

Gender preferences

  • Note that Fontana offers both male and female gastroenterologists
  • Consider if you have a preference based on personal comfort

Language considerations

  • Highlight multilingual doctors like Dr. Timothy Kuo who speaks English and Mandarin
  • Consider language barriers and the availability of interpreters if needed

Understanding insurance coverage and costs

In-network vs. out-of-network providers

  • Check if preferred doctors are in-network with your insurance
  • Understand the cost implications of choosing out-of-network providers

Potential out-of-pocket expenses

  • Inquire about co-pays, deductibles, and other potential costs
  • Ask about fees for specific procedures or tests

Insurance verification process

  • Confirm that the doctor's office accepts your insurance
  • Understand the process for verifying coverage for specific treatments