Live
Read more

About

Gastrointestinal Associates, LLP (GI Associates) is a Columbia, Missouri-based specialty gastroenterology practice with eight gastroenterologists offering comprehensive GI services since 1981. Services include colonoscopy, endoscopy, flexible sigmoidoscopy, advanced endoscopy, cap endoscopy, and IV therapy. The practice emphasizes high-quality patient care for routine GI health assessments and targeted treatments. Key details: private ownership, headquartered in Columbia, 4 office locations in the U.S., main contact 1-573-777-8818, website gicolumbia.com. Web metrics note steady patient traffic (≈3,274 monthly visits) with a high bounce rate and strong US presence.

Clinic Type

Gastroenterology

Address

210 Portland Street, Columbia, MO 65201

Phone

573-777-8818

Email

info@gicolumbia.com

Opening Hours

8:00 am – 5:00 pm

Services Offered

Technology & Equipment

  • Endoscopy
  • Colonoscopy
  • Flexible Sigmoidoscopy
  • Advanced Endoscopy
  • CAP Endoscopy Smart Pill
  • Intravenous Infusion IV Therapy

Team

  • Bradley Anderson — Physician
  • Robyn Barlow — Physician
  • Peter Jay Cleavinger — Physician
  • Kevin Halsey — Physician
  • Jeremiah Hays — Physician
  • Nicolas Llorens — Physician
  • Rita Lutz — Physician
  • Matthew Struttmann — Physician
  • Stephen Welsh — Physician
  • Michael Williams — Physician
  • Laura Williams — Physician

Insurance & Payment

Languages Spoken

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Birdeye: 4.5 out of 5 stars (818 reviews (primarily from Google))

Patients praise

  • professional and attentive healthcare provided by some doctors
  • compassionate approach from specific providers (e.g., Dr. Rita, Dr. Halsey)
  • staff described as knowledgeable and courteous by some patients
  • comfortable and pleasant office atmosphere

Common complaints

  • long wait times for appointments and referrals
  • administrative and paperwork processing delays
  • difficulties in obtaining timely responses from support staff/scheduling inefficiencies
  • concerns regarding billing/financial focus versus patient care
  • occasional reports of unprofessional or poor bedside manner

"Among the worst medical "professionals" I have ever encountered. They are all about the money, not the patient. When I switched doctors they failed to promptly send my medical history..."

Birdeye (Reviewer: Crystal S.)

"Reviews frequently highlight the compassionate approach of Dr. Rita and Dr. Halsey, who take time to thoroughly explain medical conditions and make patients feel at ease."

Wheree.com

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

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

More gastroenterology clinics in Columbia

Columbia, MO·Gastroenterology

Summary: MU Health Care (University of Missouri Health Care) is a private academic medical system based in Columbia, Missouri, offering comprehensive gastroenterology services as part of a full-spectrum care network. As Missouri’s premier academic medical center, MU Health Care provides primary to highly specialized care across 4 US locations, including University Hospital’s advanced centers (e.g., trauma, stroke, burn/wound). It is affiliated with the University of Missouri Health System and employs ~1,778 staff with annual revenue around $1.4B. For gastroenterology-specific care, MU Health Care leverages multidisciplinary expertise within its academic medical framework and regional reach (serving patients from Missouri’s counties) to deliver specialized digestive health services. Key points: - Location: Columbia, Missouri (HQ) with 4 US offices - Focus: Gastroenterology within a full spectrum of primary to specialized care - Affiliation: University of Missouri Health System; MU School of Medicine and related units - Notable facilities: University Hospital with advanced centers (including stroke and burn/wound centers) - Contact: Main line +1 573 882 4141 If you’re seeking specific GI services (e.g., endoscopy, liver disease, colorectal surgery), I can pull target details (dept contact, appointment steps, and wait times) if you’d like.

VerifiedOnline bookingSince 1839
Columbia, MO·Gastroenterology

VerifiedOnline booking
Columbia, MS·Gastroenterology

VerifiedOnline booking
Columbia, MS·Gastroenterology

Summary: - The Hattiesburg Clinic is Mississippi’s largest physician-owned, multi-specialty medical practice with over 350 providers across 19 counties and 3 US offices, headquartered in Hattiesburg, MS (founded 1963). - Services span numerous specialties, including gastroenterology, along with primary care, pediatrics, and more. - Contact: main line (601) 264-6000; address at 415 South 28th Ave, Hattiesburg, MS 39401. - Website: hattiesburgclinic.com; LinkedIn: linkedin.com/company/hattiesburg-clinic-pa. Notes relevant to “Columbia, MS - Gastroenterology - Hattiesburg Clinic Columbia”: - The Hattiesburg Clinic operates primarily out of Hattiesburg, MS with 3 US offices; Columbia, MS is not listed among their known locations. - If you’re seeking gastroenterology services specifically in Columbia, MS, you may need to contact the clinic to confirm if gastroenterology is offered there or arrange care at the Hattiesburg locations.

VerifiedOnline bookingSince 1963
Columbia, MS·Gastroenterology

VerifiedOnline booking

See all gastroenterology clinics in Columbia

Comparing your options?

See other gastroenterology clinics in Columbia, or search the full directory by insurance, ratings, and more.

More Gastroenterology Clinics