Mercy Gastroenterology
Gastroenterology • Saint Louis, MO • Since 1886 • Multiple locations including Mercy Hospital St. Louis, Chesterfield, Clayton-Clarkson, Lake St. Louis, Zumbehl Road; two satellite endoscopy centers locations
About
Mercy Gastroenterology at Mercy Hospital Saint Louis is part of Mercy, a nonprofit Catholic health system based in Chesterfield, Missouri. Mercy operates multiple hospitals and outpatient clinics across Arkansas, Kansas, Missouri, and Oklahoma, employing thousands of staff and serving as a large nonprofit health provider. The Saint Louis area Gastroenterology services are affiliated with Mercy Hospital Saint Louis, a Mercy system facility.
Clinic Type
Gastroenterology
Address
Mercy Hospital St. Louis, 615 S. New Ballas Rd, St. Louis, MO 63141
Phone
(314)2025114?
disabilityaccommodations@mercy.net
Opening Hours
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Services Offered
Technology & Equipment
Insurance & Payment
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Not specified on page
Languages Spoken
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FAQs
What is hospital-based service?
Hospital-based services are provided by Mercy Hospital St. Louis and include imaging and lab services and surgery centers; billed separately from physician services, which may affect co-pays or deductibles.
Colonoscopy Instructions
Download Review these instructions at least seven days before your colonoscopy.
GI Procedure FAQs
Download Get answers to frequently asked questions before colonoscpy/endoscopy procedures.
Social Media
Photos
What Patients Say
Overall sentiment across review platforms: mixed
- Mercy post-care survey: 4.8/5 (based on 106 responses) (106)
- WebMD Care (Dr. Parul Gor): 3.0/5 (10)
- Vitals (Dr. Paul Buse): 4.4/5 (7 reviews)
- WebMD Care (Dr. Paul Buse): 5.0/5 (17 ratings / 1 review)
- WebMD Care (Dr. Laura Ulmer): 5.0/5 (2 reviews)
- Birdeye (Mercy Gastroenterology - Lake Saint Louis): 4.5/5 (56 reviews)
Patients praise
- Individual providers often receive high praise for bedside manner and competence
- Successful outcomes in critical or urgent procedures
- Some patients appreciate providers who listen and explain conditions clearly
Common complaints
- Difficulty scheduling appointments and long wait times for procedures
- Unresponsive office staff and communication issues (e.g., failure to return calls)
- Unprofessional behavior by office staff or feeling dismissed by providers
- Lack of clear explanations or personalized attention during visits
- Disputes over appointment cancellations and rescheduling policies
"Although Dr. Buse has a warm and caring manner and seems to be very competent at his job, making an appointment with him and actually to see him at the appointed time is a challenge."
— Vitals patient review for Dr. Paul Buse"I came to Mercy with a major GI bleed and almost died but Dr. Ulmer was able to stop the bleeds and save my life."
— WebMD patient review for Dr. Laura Ulmer"Absolutely awful. Good luck trying to make an appointment. They hardly ever pick up the phone, and when they do, they make it as difficult as possible."
— LocalityBiz patient review for Mercy Clinic GastroenterologySynthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].
In the News
- No Sedation, Less Stress: Mercy Kids GI Expands Endoscopy Options for Kids — Jun 25, 2026
- Mercy St. Louis Uses Sci-Fi-Like Tech to Destroy Liver Tumors Without a Single Incision — Mar 30, 2026
- No Sedation, Less Stress: Mercy Kids GI Expands Endoscopy Options for Kids | lifestyle.presbycamp.org — Jun 25, 2026
- No Sedation, Less Stress: Mercy Kids GI Expands Endoscopy Options for Kids | Morningstar — Jun 25, 2026
- Michelle Baliss, DO - WashU Medicine Physicians — Aug 13, 2025
Information sourced from the clinic's website as of July 11, 2026.
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