Dr. Martin P. Greydanus, MD | Grand Rapids, MI | Gastroenterology

.about .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr. Martin Greydanus is a gastroenterologist with dual specialization in internal medicine who has devoted over four decades to patient care. They earned their medical degree from Michigan State University College of Human Medicine and completed residency training at the prestigious Mayo Clinic and Medical School. With 42 years of clinical experience, Dr. Greydanus brings extensive expertise to complex digestive health conditions. They provide care in English for patients throughout the region.

Dr. Greydanus practices at Grand River Gastroenterology in Grand Rapids, Michigan, and maintains hospital privileges at MyMichigan Medical Center Saginaw. Their clinical focus encompasses treating conditions such as leg fractures and macroglobulinemia, demonstrating expertise across both gastroenterology and internal medicine specialties. Patients have given Dr. Greydanus an average rating of 3.2 out of 5 stars on Vitals, reflecting their experience with their comprehensive approach to …digestive and internal medicine care.

Read More Read less

AI-generated from data on this provider profile.

accepting new patients
3.2

11 Ratings
42 years of experience
2 insurance plans accepted
speaks English
Mayo Clinic And Medical School
5 written reviews
2 specialties
11 areas of expertise
2 board certifications
1 hospital affiliation
1 office location

11 ratings & reviews

Sort:

Showing 1 to 5 of 5 reviews

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Best Dr I have ever had. Managed to help me change my liver damage.

August 15th, 2023

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Best Dr Ever !!!

May 11th, 2023

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Bad experience. No complaints clinically but bedside manner is awful.

July 29th, 2020

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Lack of humility and knowledge. Practices outdated measures to tx. CD. Neglectful, no proper follow up care. Really bad times for me to look back on. Once I left, I read some of his published writings, an embarrassment. Help yourself by never seeing Martin Greydanus.

December 21st, 2018

.rating-and-reviews .noScriptHide .nojs-show,.truncated [data-rem],blockquote .truncated-text{ display: initial !important}.no-js-hide,.ellipsis { display: none; }.truncated:after {content: '' !important}

Dr. Martin Greydanus is one of the very best! With extreme internal bleeding I enter the emergency room with a twenty-five percent chance of seeing another day. Thanks to this extemely intelligant, well educated and gifted Gastroenterologist my life was spared and due to Dr. Greydanus'emergency intervention and follow-up/aftercare I am feeling termendous. In fact I feel better than I have in long long time. Yes I am extremely grateful that one of the best is right here in Grand Rapids and somehow we were brought together in this life saving and life changing experience.

October 4th, 2012

Grand River Gastroenterology

310 Lafayette Ave SE Ste 400Grand Rapids, MI 49503

Tel: (616) 752-6525

Mon9:00 am - 4:30 pm

Tue9:00 am - 4:30 pm

Wed9:00 am - 4:30 pm

Thu9:00 am - 4:30 pm

Fri9:00 am - 4:30 pm

SatClosed

SunClosed


Dr. Martin P Greydanus, MD	Theresa Obonyano, APRN	Meagon Ann Oliver	Dr. Karyn Elizabeth Gell, MD
Gastroenterology	Gastroenterology	Nurse Practitioner	Allergy & Immunology
Accepts New Patients	Accepts New Patients		Accepts New Patients
3.2 (11 Ratings)	0 (0 Ratings)	0 (0 Ratings)	3.9 (7 Ratings)
42 Years of Experience			39 Years of Experience
No Virtual Visit Option	Virtual Visit Available	No Virtual Visit Option	No Virtual Visit Option
Speaks English	Speaks English	Speaks Vietnamese, Spanish	Speaks English
Grand Rapids , MI	SACRAMENTO , CA	Grand Rapids , MI	Grand Rapids , MI
Med School: Michigan State University College Of Human Medicine	Med School: The University of Texas Health Science Center at Houston		Med School: Michigan State University College Of Human Medicine
Current Profile	View Profile	View Profile	View Profile

Search for your insurance and plan

Accepts Medicare
Accepts Medicaid
Aetna
Priority Health

Abdominal Pain
Acid Reflux Disease (Gastroesophageal Reflux / GERD)
Acid Reflux Disease (GERD)
Celiac Disease
Colonoscopy
Constipation
Hemorrhoids
Hepatitis C
Internal Medicine
Irritable Bowel Syndrome (IBS)
Ulcerative Colitis

EDUCATION & TRAINING

Residency

Mayo Clinic And Medical School

Medical School

Michigan State University College Of Human MedicineGraduated in 1984

Dr. Mohamad Adnan Saab, DO
Interventional Cardiology
16 Years Exp | Grand Rapids, MI
(1)
Dr. Serena Maria Chacko, MD
Diagnostic Radiology
14 Years Exp | Grand Rapids, MI
(0)
Dr. Michelle Marie Condon, MD
Emergency Medicine
47 Years Exp | Grand Rapids, MI
(1)
Dr. Jay Arvindkumar Patel, MD
Hospital Medicine
18 Years Exp | Grand Rapids, MI
(0)
Dr. Will Sihang Kurtz, MD
Anesthesiology
11 Years Exp | Grand Rapids, MI
(0)
Dr. Mikhail Shteynvil, MD
Hospital Medicine
11 Years Exp | Grand Rapids, MI
(0)
Dr. Karim Robert Saleeby, DO
Hospital Medicine
13 Years Exp | Greenville, MI
(0)
Dr. Sarah Elizabeth Fahnhorst, DO
Pediatrics
13 Years Exp | Grand Rapids, MI
(0)
Dr. Shannon Leigh Andrews, MD
Infectious Disease
15 Years Exp | Minneapolis, MN
(1)
Kimberly Sue Agim
Nurse Practitioner
| Grand Rapids, MI
(0)

Which hospitals is Dr. Martin Greydanus affiliated with?: Dr. Martin Greydanus is affiliated with Mymichigan Medical Center Saginaw.
How can I make an appointment with Dr. Martin Greydanus?: You can find contact information for Dr. Martin Greydanus here on Vitals.
Does Dr. Martin Greydanus accept virtual/telehealth appointments?: Dr. Martin Greydanus has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Dr. Martin Greydanus's office located?: Dr. Martin Greydanus's office is located at 310 Lafayette Ave SE Ste 400, Grand Rapids, MI, 49503.
Is Dr. Martin Greydanus accepting new patients?: Dr. Martin Greydanus is accepting new patients on Vitals. View Dr. Martin Greydanus's profile on Vitals to make an appointment.

Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.

Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.

Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.

Copyright © 2026 Vitals Consumer Services, LLC. US Patent No. 8, 694, 441. All Rights Reserved.
As more fully set forth in this website's terms of use . (1) nothing contained on or offered by or through this website should be construed as medical advice and should not be relied upon for medical diagnosis or treatment. Vitals Consumer Services, LLC ("Vitals"). the provider of this website, does not recommend or endorse any particular healthcare provider whose information or ratings appear on this website; and (2) Vitals has granted you a limited license to access and use this website for your own noncommercial use. You are not permitted to copy, reproduce, distribute, transmit, mirror, frame, scrape, extract, wrap, create derivative works of, reverse engineer, decompile or disassemble any part or aspect of this website.