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St. Mary's Gastroenterology Center

4.2 out of 5 · 32 reviews

Gastroenterology • Amsterdam, NY • Since 1903

About

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St. Mary’s Gastroenterology Center (part of St. Mary’s Healthcare Amsterdam) is a nonprofit healthcare provider in Amsterdam, NY, delivering gastrointestinal care as part of a broader hospital system. Key details: - Affiliation: St. Mary’s Healthcare Amsterdam (nonprofit hospital and health system) - Location: 427 Guy Park Ave, Amsterdam, NY 12010 (HQ for the organization) - Services: Gastroenterology through the system’s expanded offerings (linked to the organization’s growth in specialty care) - Population served: Patients in Amsterdam and the Mohawk Valley, with a focus on comprehensive care within a community hospital setting - Contact: Main line 1-518-842-1900

Clinic Type

Gastroenterology

Address

Medical Office Building, Floor 2/Suite 201, 425 Guy Park Avenue, Amsterdam, NY 12010

Phone

(518) 843-1240

Email

humanresourcesall@nysmha.org

Opening Hours

Monday–Friday 8AM–4:30PM

Website

https://www.smha.org/locations/gastroenterology-health-center/

Services Offered

  • Gastroenterology
  • Colonoscopy
  • Colon cancer screening
  • Digestive disease treatment

Team

  • Michael Coles, MD — MD, Gastroenterology
  • Diane Gagliardi, MSN, AGPCNP-BC, RN — MSN, AGPCNP-BC, RN
  • Garth Garramone, MD, FACP — MD, FACP

Insurance & Payment

—

Languages Spoken

  • English

Social Media

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Photos

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What Patients Say

Overall sentiment across review platforms: mixed

  • US News & World Report: 3/5 (for Dr. Christopher C. Ashley) (6 reviews)
  • WebMD: 4.5/5 (Overall rating for Dr. Michael Finnegan) (26 ratings (with 1 written review))
  • Healthgrades: 60% (Hospital-wide patient experience rating) (N/A)

Patients praise

  • Staff perceived as courteous
  • Clear instructions provided during visits

Common complaints

  • Reports of perceived lack of interest or incompetence from individual providers
  • Hospital-wide patient experience ratings below the national average

"The guy doesn't show any interest in treating me. Don't know if he's just lazy or incompetent. I wouldn't recommend him to anyone."

— WebMD review of Dr. Michael Finnegan

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

In the News

Information sourced from the clinic's website as of July 11, 2026.

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