Our Experienced Providers

Meet our Doctors:
Dr. Jason Yip, MD

Dr. Jason Yip is an energetic, caring gastroenterologist treating patients in Orange County. When treating patients, he cares for them as if they were members of his own family. He makes sure to take the time to provide clearly explained, competent care. Patients visiting Dr. Yip can receive a full range of gastroenterological services such as general consultations, endoscopies, colonoscopies, hemorrhoid banding and Endoscopic retrograde cholangiopancreatography (ERCP) among other services.

Outside of the office, Dr. Yip enjoys playing Ultimate Frisbee, cooking, karaoke, and spending time with his family.

Languages: English, Spanish (Conversational), Chinese (Cantonese)

Education and Experience:
Tufts Medical Center 
     Fellowship, Gastroenterology, 2009-2012
Mount Sinai School of Medicine 
     Residency, Internal Medicine/ Pediatrics, 2005-2009 
University of Washington School of Medicine 
      Medical School 
University of California Berkeley 
     Undergraduate 

Meet our Doctors:
Dr. Amit Bhanvadia, MD

Dr. Bhanvadia approaches patientcare holistically, combining current evidence-based medicine with an individualized approach. He aims to provide the highest level of care while making sure his patients feel included in their treatment process.

Training in New York City has allowed Dr. Bhanvadia to encounter a broad spectrum of diseases. Patients visiting him can expect to receive comprehensive and integrative care. Dr. Bhanvadia offers a full range of gastroenterological services such as general consultations, endoscopies, colonoscopies, and hemorrhoid banding. Additionally, Dr. Bhanvadia has a special interest in clinical research, allowing his patients to have access to cutting edge treatment options.

During his free time, Dr. Bhanvadia enjoys cooking, music, photography and spending time with his family.

Languages: English, Hindi, Gujarati

Education and Experience:
Zucker School of Medicine at Hofstra/Northwell at Lenox Hill Hospital
     Fellowship, Gastroenterology, 2016-2019
State of University New York Downstate 
     Residency, Internal Medicine 
St. George’s University School of Medicine
     Medical School 
University of California, Los Angeles 
     Undergraduate; Magna Cum Laude 

Meet our Doctors:
Dr. Thomas Konturek, MD

Dr. Thomas Konturek is a gastroenterologist providing compassionate, integrated care for the prevention, diagnosis and treatment of gastrointestinal and liver diseases to his patients in the North Orange County Area.
Working in different countries and experiencing patient care in different culturally sensitive settings, Dr. Konturek’s focus in treating GI related diseases is patient centered with the aim to provide the best possible evidence-based approach to the care of his patients.
Dr. Konturek’s special interests include digestive disorders of the brain-gut interaction (irritable bowel syndrome), small intestinal bacterial overgrowth (SIBO) and peptic related diseases (GERD and peptic ulcer disease). In addition to clinical work, Dr. Konturek conducted translational research in the field of neurogastroenterology with focus on nerve growth factors in IBS.

Languages: English, German, Polish
 
Education: 
Loyola University Medical Center in Chicago
     Fellowship, Gastroenterology 
St. Elizabeth’s Medical Center (Tufts School of Medicine), Boston 
     Residency, Internal Medicine 
Charité Universitätsmedizin, Berlin, Germany 
     Medical School 

Meet our Doctors:
Dr. Erica St. Lawrence, MD

Dr. Erica St. Lawrence is a dedicated, compassionate gastroenterologist treating patients in Orange County. She takes the time to listen, explain each step clearly, and partner with her patients on a plan that fits their lives. After completing her residency and gastroenterology fellowship in Michigan, Dr. St. Lawrence returned to California, where she earned her undergraduate degree and began her career in research.

Patients visiting Dr. St. Lawrence can receive a full range of gastroenterological services such as general consultations, endoscopies, colonoscopies, and hemorrhoid banding among other services. Before and during her training, Dr. St. Lawrence worked in laboratory and clinical research on hepatitis C treatment, liver cancer, Crohn’s disease outcomes, and the biology of peptic ulcers and colon polyps, and she brings that evidence-based perspective to the care of every patient.

Outside of the office, Dr. St. Lawrence enjoys working out and trying new places to eat.

Languages:
-English
-Spanish (Conversational)

Education and Experience:
Corewell Health East, Farmington Hills, Michigan
Fellowship, Gastroenterology, 2023-2026
Detroit Medical Center – Huron Valley Sinai Hospital
Chief Resident, Internal Medicine, 2022-2023
Detroit Medical Center – Huron Valley Sinai Hospital
Residency, Internal Medicine, 2019-2022
American University of the Caribbean School of Medicine
Medical School
University of California, San Diego
Undergraduate

Certifications & Licenses:
American Board of Internal Medicine
Certified in Internal Medicine
CA State Medical License

Leadership Roles:
Detroit Medical Center – Huron Valley Sinai Hospital
Chief Resident, Internal Medicine, 2022-2023
Michigan State University College of Osteopathic Medicine
Clinical Instructor / Resident Faculty, 2019-2023
Detroit Medical Center Resident Council
Member, 2019-2023
Huron Valley Sinai Hospital GI Journal Club Committee
Member, 2019-2023
Internal Medicine Residency Clinical Competency Committee
Member, 2022-2023

Our Nursing & Front Desk Team

Christina Ko, RN
Director of Nursing
Amanda Nguyen, RN
Lead Nurse
Jacqueline Sanchez
Practice Administrator
Tuyen Lee, CRNA
Anesthesia Director