Gateway Gastroenterology

Overall rating

Top reviews

Dr. Mathews has been my GI doctor for over 25 years. He is a very knowledgeable and personable doctor who makes you feel at ease. I think highly of him and have recommended him to my family members who are in need of a gastroent... Read more Dr. Mathews has been my GI doctor for over 25 years. He is a very knowledgeable and personable doctor who makes you feel at ease. I think highly of him and have recommended him to my family members who are in need of a gastroenterologist.
Read less
Karen C. • March 27, 2026
She listened intently to all my symptoms/comments. And we discussed how I can overcome some of my issues with diet and with Medication’s. And those situations where I have had to see her in the office she has always kind and under... Read more She listened intently to all my symptoms/comments. And we discussed how I can overcome some of my issues with diet and with Medication’s. And those situations where I have had to see her in the office she has always kind and understanding.
Read less
Sandra F. • March 27, 2026
Read more reviews

About Gateway Gastroenterology

At Gateway Gastroenterology in Chesterfield, Missouri, your digestive health is our priority.  Our board-certified gastroenterologists and advanced nurse practitioners provide expert consultations and care in a friendly, approachable way --- making sure you always feel heard and understood.  We're proud that our physicians have been recognized as BEST DOCTORS by the St. Louis Magazine, a reflection of our commitment to excellence and compassion.  

Our team is highly-trained in diagnosing and treating a wide range of gastrointestinal conditions, including acid reflux, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and liver disease. While we work closely together as a group; each patient is cared for by a dedicated gastroenterologist --- building trust, continuity, and long-lasting relationships.  And because your health can't always wait, a Gateway gastroenterologist is available for emergencies whenever you need us. 

In addition to patient care at our main office in Chesterfield, we also perform colonoscopy and upper endoscopy procedures at Gateway Endoscopy Center (Saint Louis), SCOPES (Des Peres), Saint Louis Multi-Specialty Surgery Center (Ballwin), and St Luke’s Hospital (Chesterfield). Our office also offers convenient on-site diagnostic tests like capsule endoscopies, breath testing, and infusion services. For added flexibility, ask about our Saturday hours at Gateway Endoscopy Center for routine procedures at Gateway Endoscopy Center.

As preferred providers for many insurance plans, and our experienced administrative staff is always ready to help you with questions about coverage and reimbursement. At Gateway Gastroenterology, patients always come first. We invite you to contact us today and let us partner with you in taking the best possible care of your digestive health.

 

 

Insurances

  • Aetna
  • Ambetter Health
  • Anthem Blue Cross Blue Shield
  • Cigna
  • ESSENCE Healthcare
  • HealthLink
  • Medicare
  • UnitedHealthcare Oxford

Specialties

  • Gastroenterologist
  • Internist
  • Nurse Practitioner
  • General Practice Physician
  • Registered Nurse

Services

  • Abdominal Pain
  • Acid Reflux
  • Barrett’s Esophagus
  • Capsule Endoscopy
  • Celiac Disease
  • Colon Cancer Screening
  • Colonoscopy
  • Conditions
  • Constipation
  • Crohn’s Disease

Providers (10)

Dr. Jeffrey Mathews, MD
4.9353612 (789)

Dr. Jeffrey Mathews, MD

Gastroenterologist

4.9 (789)
17298 N. Outer 40 Road
Suite 200
Chesterfield, MO, 63005
And 2 more locations
Dr. Richard Riegel, MD
4.9407115 (759)

Dr. Richard Riegel, MD

Gastroenterologist

4.9 (759)
17298 N. Outer 40 Road
Suite 200
Chesterfield, MO, 63005
And 2 more locations
Dr. Rajeev Ramgopal, MD
4.9087302 (756)

Dr. Rajeev Ramgopal, MD

Gastroenterologist

4.9 (756)
17298 N. Outer 40 Road
Suite 200
Chesterfield, MO, 63005
And 2 more locations
Dr. Andrew Su, MD
4.9263006 (692)

Dr. Andrew Su, MD

Gastroenterologist

4.9 (692)
17298 N. Outer 40 Road
Suite 200
Chesterfield, MO, 63005
And 2 more locations
Mrs. Kaitlin Schild, AGNP-C
4.9173913 (690)

Mrs. Kaitlin Schild, AGNP-C

Nurse Practitioner

4.9 (690)
17298 N. Outer 40 Road
Suite 200
Chesterfield, MO, 63005
And 1 more location
Dr. Brian McMorrow, MD
4.9217134 (677)

Dr. Brian McMorrow, MD

Gastroenterologist

4.9 (677)
17298 N. Outer 40 Road
Suite 200
Chesterfield, MO, 63005
And 2 more locations
Mrs. Cheri Carmody, RN BC ANP
4.9345238 (672)

Mrs. Cheri Carmody, RN BC ANP

Nurse Practitioner

4.9 (672)
17298 N. Outer 40 Road
Suite 200
Chesterfield, MO, 63005
And 1 more location
Sarah Keim
4.9138943 (511)

Sarah Keim

Nurse Practitioner

4.9 (511)
17298 N. Outer 40 Road
Suite 200
Chesterfield, MO, 63005
And 1 more location
Taylor Geisman, MD
4.9209979 (481)

Taylor Geisman, MD

Internist

4.9 (481)
17298 N. Outer 40 Road
Suite 200
Chesterfield, MO, 63005
And 3 more locations
Dr. Siri Ancha, MD
4.9209979 (481)

Dr. Siri Ancha, MD

General Practice Physician

4.9 (481)
17298 N. Outer 40 Road
Suite 200
Chesterfield, MO, 63005
And 1 more location

Reviews

Overall rating

4.9
2179 Reviews

Newest reviews

Terms & Privacy

This practice uses SMS for patient communication.

SMS Terms & Privacy - By opting in, you agree to receive SMS alerts regarding your appointment from Gateway Gastroenterology. Message frequency varies. Message and data rates may apply. Reply STOP to opt out at any time. For questions, please call (314) 729-9780. Your mobile information will not be shared with third parties.