Dr. Marylyn V. Grondin, MD | Portsmouth, NH | 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. Marylyn Grondin is a gastroenterologist and internal medicine physician who brings 48 years of experience to patient care. She earned her medical degree from Universidad De La Salle Facultad Mexicana De Medicina and completed her residency training at Bridgeport Hospital. Her dual specialty training allows her to provide comprehensive digestive health care while also addressing general internal medicine needs. Dr. Grondin is fluent in both English and Spanish, helping her connect with a diverse patient population.

Dr. Grondin practices at Portsmouth Regional Hospital in Portsmouth, New Hampshire, and also sees patients at Stratham Ambulatory Surgery Center in Stratham, New Hampshire. She maintains an affiliation with Anna Jaques Hospital. Her expertise focuses on common digestive conditions such as colon polyps, hemorrhoids, and diverticular disease. Dr. Grondin performs colonoscopies and lower gastrointestinal endoscopy procedures to diagnose and treat these conditions. Patients …have given her an average rating of 4.3 out of 5 stars, reflecting their confidence in her care.

Read More Read less

AI-generated from data on this provider profile.

accepting new patients
4.3

16 Ratings
48 years of experience
29 insurance plans accepted
speaks English, Spanish
Bridgeport Hospital
7 written reviews
2 specialties
11 areas of expertise
2 board certifications
1 hospital affiliation
2 office locations
Female

16 ratings & reviews

Sort:

Showing 1 to 7 of 7 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}

I recently had a colonoscopy with Dr Grondin at Portsmouth Hospital. The team (of women) was great and it went well, despite my normal nervousness before the procedure. The only thing I would change is the prep procedures. I had a hard time as it was very toxic and too much. I understand there are simpler cleanses out there and I would ask that they look into that. I scheduled with Dr Grondin because I wanted a woman doctor but even though I had never been to her before, the scheduling was easy and her care was very good. Highly recommend her and the Portsmouth team.

February 21st, 2022

.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. Grondin lacks bedside manner. I was two minutes late for my appointment and she nearly wouldn't been me. (Even though she, herself was running late.)She lacks compassion for nervous clients.When I called her office for more information regarding a surgery that was scheduled with little information besides " ok, we're scheduling you for surgery." Her response was to "Make an office appointment, period!" Turns out, I didn't even need surgery! After seeking a second opinion there were tons of alternative, non-invasive treatments! I've since reported her to the medical board, seek an alternative Dr!

September 18th, 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}

Very happy , and have been treated by Dr. Grondin for 14 years.!!!

June 21st, 2016

.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. Grondin was caring and informative - and I was very nervous. I had an endoscopy and a colonoscopy with her - the only procedures to date that I had ever been sedated for. I have recommended her to my friends.

April 28th, 2015

.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. was kind, gentle and informative.

October 16th, 2013

.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}

So far I have been more than satisfied with both Dr, Grondin and her staff. My recent visit to her Stratham location for a colonoscopy and endoscopy was quick, efficient and professional.

January 5th, 2011

.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}

I do not believe Dr. Grondin is a bad person or even a bad doctor, but she has such a busy office and rude staff that I feel she wasnt able to give my daughter the attention she deserved. Dr. Grondin, in my case, displayed an ineptness that could only be described as pathetic. The way she handled my daughter's case was disappointing and her Nurse Maria was not nice about things.I believe Ms. Grondin has a good heart and wishes the best for her patients. But she failed my daughter.

December 11th, 2010

Portsmouth Regional Hospital

333 Borthwick AvePortsmouth, NH 03801

Tel: (603) 436-5110

Stratham Ambulatory Surgery Center

4 West RdStratham, NH 03885

Mon12:00 am - 12:00 pm

Tue12:00 am - 12:00 pm

Wed12:00 am - 12:00 pm

Thu12:00 am - 12:00 pm

Fri12:00 am - 12:00 pm

Sat12:00 am - 12:00 pm

Sun12:00 am - 12:00 pm


Dr. Marylyn Virginia Grondin, MD	Chimdi Mfebe, APRN	Dr. Utsav Nayan Parikh	Rashmikaben Kalabhai Patel
Gastroenterology	Gastroenterology	Hospital Medicine	Nurse Practitioner
Accepts New Patients	Accepts New Patients		Accepts New Patients
4.3 (16 Ratings)	0 (0 Ratings)	0 (0 Ratings)	0 (0 Ratings)
48 Years of Experience		8 Years of Experience
No Virtual Visit Option	Virtual Visit Available	No Virtual Visit Option	No Virtual Visit Option
Speaks English, Spanish	Speaks English
Portsmouth , NH	Little Rock , AR	Dover , NH	Algonquin , IL
Med School: La Salle University School Of Medicine	Med School: Chamberlain University College of Nursing	Med School: S B K S Medical Institute And Research Centre
Current Profile	View Profile	View Profile	View Profile

Search for your insurance and plan

AARP
AARP - Medicare
Aetna
Aetna - Medicare
AmeriHealth
AmeriHealth - Medicaid (Managed)
Anthem Blue Cross
APWU
Blue Cross Blue Shield
Cigna
Cigna-HealthSpring
Community Health Options
Harvard Pilgrim Health Care
Health New England
Humana
Medicaid - Medicaid (Managed)
Medicare
Medicare - Medicare
Meritain Health
New Hampshire Healthy Families
Optum Health
Sierra Health and Life
Tricare
Tufts Health Plan
UniCare
UnitedHealthcare
UnitedHealthcare - HMO
UnitedHealthcare - Medicare
Wellcare

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

Bridgeport Hospital

Medical School

La Salle University School Of Medicine

Universidad De La Salle Facultad Mexicana De MedicinaGraduated in 1978

Dr. Paul King Deranian, MD
Critical Care Medicine
38 Years Exp | Exeter, NH
(3)
Dr. Michael Casimir Danielski, MD
Nephrology
28 Years Exp | Portsmouth, NH
(4)
Dr. Ronald Hugh Prokopius
Hospital Medicine
26 Years Exp | Geneva, NY
(5)
Dr. Kirwan Thomas Macmillan
Nuclear Medicine
70 Years Exp | Haverhill, MA
(0)
Dr. Judith Ann Chandler, MD
Emergency Medicine
| Durham, NH
(1)
Dr. Keith Jay Champney, MD
Infectious Disease
| Haverhill, MA
(1)
Dr. Sreelakshmi Kooragayalu
Hospital Medicine
| Cumberland, MD
(0)
Dr. Sarthak Khare
Interventional Cardiology
9 Years Exp | Rochester, NH
(0)
Dr. Zeeshan Sheriff
Hospital Medicine
13 Years Exp | Dover, NH
(0)
Dr. Satyaki Chakrabarty
Nephrology
9 Years Exp | Portsmouth, NH
(0)

Which hospitals is Dr. Marylyn Grondin affiliated with?: Dr. Marylyn Grondin is affiliated with Anna Jaques Hospital.
Does Dr. Marylyn Grondin accept my insurance?: You can see the insurance plans that Dr. Marylyn Grondin accepts on their Vitals profile.
What languages does Dr. Marylyn Grondin speak?: Dr. Marylyn Grondin speaks English and Spanish.
How can I make an appointment with Dr. Marylyn Grondin?: You can find contact information for Dr. Marylyn Grondin here on Vitals.
Is Dr. Marylyn Grondin accepting new patients?: Dr. Marylyn Grondin is accepting new patients on Vitals. View Dr. Marylyn Grondin'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.