Gastroenterology | Catholic Medical Center
Gastroenterology • Manchester, NH • Since 1892
About
Gastroenterology at Catholic Medical Center (CMC) in Manchester, NH - CMC is a nonprofit, full-service acute care hospital with 330 beds (258 staffed) in Manchester, part of a larger New Hampshire health system. - Location: 100 McGregor Street, Manchester, NH 03102. Level III trauma, 24-hour ED, imaging and numerous subspecialties. - Gastroenterology services are part of CMC’s broad offerings, including subspecialties and diagnostic imaging. - Notable context: CMC hosts Norris Cotton Cancer Center services; the site has faced prior investigative scrutiny in 2022 related to surgical malpractice coverage concerns (external exposé, not specific to gastroenterology care today). - Quick facts: Nonprofit hospital, founded 1892, affiliated with a broader NH and international presence, and operates within a larger health system network. For direct gastroenterology appointments, contact main line or visit the CMC website.
Clinic Type
Gastroenterology
Address
100 McGregor Street, Manchester, NH 03102, US
Phone
+1-800-849-0829
cmc.radsafety@cmc-nh.org
Opening Hours
Not published — contact the clinic to confirm hours.
Emergency Care
Emergency care available (Catholic Medical Center)
Services Offered
Technology & Equipment
Team
Insurance & Payment
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Languages Spoken
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FAQs
When should I call my doctor?
Call your doctor immediately if you have any of the following problems after your colonoscopy or upper endoscopy (specific symptoms are discussed in the FAQs).
Social Media
Photos

What Patients Say
Overall sentiment across review platforms: mixed
- US News (Catholic Medical Center Gastroenterologists): 5/5 (Overall patient experience) (19 reviews)
- Healthgrades: 4.1/5 (Dr. Timothy Scherer) (7 reviews)
- US News (Doctor Profile): 4/5 (Dr. Arathi Komarla) (15 reviews)
- Vitals: 4.9/5 (Dr. Francis P. Macmillan) (13 ratings)
- Birdeye: 2.5/5 (NH Gastroenterology) (34 reviews)
Patients praise
- Providers perceived as thorough, knowledgeable, and personable
- Strong bedside manner and effective communication for some physicians
- Positive experiences with certain PA and nursing staff
Common complaints
- Issues with administrative follow-up, communication, and appointment scheduling
- Perceived lack of attentiveness or bedside manner in certain providers
- Difficulty in securing timely callbacks or prescription refills
"Office poor followup, callbacks nonexistent, multiple calls for Rx NEVER filled in timely manner... Dr Scherer wonderful, office very disappointing."
— Healthgrades (Patient Review)"Dr. Macmillan performed a colonoscopy on me... he immediately put me at ease. I have full faith in Dr. Macmillan and would trust him with my life."
— Vitals (Patient Review)"The word haughty describes her 100%. Her word is gospel and DON'T EVER ask her why she chose a particular procedure... You have no say in your treatment."
— Vitals (Patient Review)Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].
In the News
- Gastroenterology in New Hampshire - CMC Providers — Jul 29, 2025
- Catholic Medical Center — Jul 24, 2025
- Gastroenterology Advanced Practice Provider - HCA Healthcare — Jun 3, 2026
- Primary Care | Catholic Medical Center Physician Services Practices — Jul 29, 2025
Information sourced from the clinic's website as of July 11, 2026.
More gastroenterology clinics in Manchester
Summary: The Elliot Hospital in Manchester, NH (part of SolutioNHealth) is a nonprofit, acute-care hospital with 296 beds and a Level II trauma center. It offers comprehensive medical services across its Elliot Health System, including the Elliot Medical Group and related centers. For GI services, contact the hospital directly or check the Elliot Health System gastroenterology department for clinics, specialists, procedures (EGD, colonoscopy), and locations (Manchester and ambulatory centers). Key contacts: customer service 603-669-5300, 603-663-4567, or 833-920-7473. Address: One Elliot Way, Manchester, NH 03103.
Granite State Gastroenterology is a New Hampshire-based GI clinic offering general gastrointestinal care, inflammatory bowel disease (IBD) management, esophageal motility disorders, liver disease treatment, and hepatitis C care. Headquartered in Derry with five office locations across NH (including Derry, Raymond, Windham, and Bedford). Key personnel include Gastroenterologist Managing Partner Dr. Leon McLean and Director of Operations Jennifer Marshall. They emphasize patient choice and communication, with a small team (about 13 employees). Priorities likely include IBD care, GI disorders, and liver disease, supported by a regional presence and multiple contact numbers for scheduling. If you’re seeking GI services in Manchester, note that Granite State Gastroenterology operates offices within NH communities and may serve nearby areas; for Manchester-specific GI care, confirm closest location and available IBD or liver disease specialists.
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See other gastroenterology clinics in Manchester, or search the full directory by insurance, ratings, and more.

