Company lists · Data refreshed September 2026
Top 25 Gastroenterology medical groups based in the United States
RevenueBase identified 957 gastroenterology medical groups headquartered in the United States as of September 2026 and tracks 22,010 professional contacts across them, including 6,480 with verified work emails. New York is the largest hub.
This list covers gastroenterology medical groups headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest gastroenterology medical groups based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,258 contacts → | ||||
Partial evidence “The Permanente Medical Group (TPMG) is the largest physician-led medical group in the United States.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,042 contacts → | ||||
Indirect evidence “Gastro Health is a diverse group of professionals dedicated to digestive and liver health.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 815 contacts → | ||||
Indirect evidence “At the core, GI Alliance operates on a philosophy grounded by three guiding principles: Patient First.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 771 contacts → | ||||
Indirect evidence “We’re redefining & transforming the approach to health, the business of health, & the overall well-being of the community.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 546 contacts → | ||||
Indirect evidence “A large private multi-specialty physician group in the city of Toledo.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 495 contacts → | ||||
Indirect evidence “Piedmont HealthCare is one of the largest physician-owned and directed, multi-specialty groups in North Carolina and the Southeast regions.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 408 contacts → | ||||
Partial evidence “Over the past 70 years, Borland Groover has grown into one of Florida’s largest gastroenterology clinics.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 398 contacts → | ||||
Partial evidence “MNGI Digestive Health (previously Minnesota Gastroenterology, P.A.) is a Twin Cities-based physician practice specializing in the diagnosis and treatment of adult and pediatric…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 372 contacts → | ||||
Partial evidence “As one of the largest GI practice management companies in the U.S, United Digestive focuses on building partnerships with physicians and gastroenterology practices nationwide.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 318 contacts → | ||||
Partial evidence “Our goal at Loudoun Medical Group (LMG) is to provide every single patient with top-quality medical care and personalized service.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 276 contacts → | ||||
Partial evidence “At Bethany Medical, Your Health is Our Concern!” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 266 contacts → | ||||
Partial evidence “Atlanta Gastroenterology Associates (AGA), now part of United Digestive, is one of the largest gastroenterology practices in the country.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 233 contacts → | ||||
Partial evidence “Texas Digestive Disease Consultants (TDDC) is the largest gastroenterology group in the United States with 207 board-certified physicians and 99 locations.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 230 contacts → | ||||
Indirect evidence “Founded in the 1990’s, Epic Care started as a group of board certified hematologists and oncologists based in Northern California’s East Bay area.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 227 contacts → | ||||
Partial evidence “Specialist focused Multi-Specialist Internal Medicine Group located in Cheyenne, WY.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 216 contacts → | ||||
Indirect evidence “At Ohio Gastro we improve the health of our patients through the delivery of high-quality care.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 209 contacts → | ||||
Partial evidence “Founded in 2009, Capital Digestive Care is the largest private gastroenterology practice in the Mid-Atlantic.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 195 contacts → | ||||
Indirect evidence “Oshi Health is the first and only nationwide virtual GI center of excellence - setting a new standard for life-changing digestive healthcare - delivering proven care at scale to…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 189 contacts → | ||||
Indirect evidence “In 1996, thirty-seven physicians had the foresight to understand that in an ever-changing healthcare environment, a large, independent physician group would be better positioned…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 170 contacts → | ||||
Partial evidence “Allied Digestive Health is a leading gastroenterology group in the Northeast, with a network of over 200 board-certified gastroenterologists and advanced care providers.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 162 contacts → | ||||
Partial evidence “One GI is a physician-centric gastroenterology management services organization (MSO) that partners with gastroenterologists to help them manage, optimize, and grow their…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 148 contacts → | ||||
Partial evidence “The American Gastroenterological Association is the trusted voice of the GI community.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 136 contacts → | ||||
Partial evidence “At Charlotte Gastroenterology & Hepatology, PLLC, you’ll find outstanding physicians with comprehensive training and extensive experience.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 135 contacts → | ||||
Indirect evidence “Founded in Cedar Rapids in 1997, Physicians’ Clinic of Iowa (PCI) is one of Iowa’s largest private, multispecialty physician groups.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 135 contacts → | ||||
Indirect evidence “At Arizona Digestive Health, we are committed to providing an outstanding level of care through thoughtful and comprehensive consultations and the most advanced procedures…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: gastroenterology medical groups. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names gastroenterology medical groups.
- Partial evidence
- Its own public description names part of gastroenterology medical groups, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name gastroenterology medical groups. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 957 gastroenterology medical groups based in the United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 6,480 reachable decision-makers.
Free signup · no credit card
Gastroenterology medical groups based in the United States at a glance
As of Sep 16, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 957 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among gastroenterology medical groups, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “gastroenterology medical groups”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names gastroenterology medical groups), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among gastroenterology medical groups, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 6,480 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 16, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Gastroenterology medical groups by metro
- Gastroenterology medical groups in New York30
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names gastroenterology medical groups, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many gastroenterology medical groups are there based in the United States?
RevenueBase identified 957 gastroenterology medical groups headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
The Permanente Medical Group, INC, headquartered in Pleasanton, tops this list with the largest team on record.
Which city has the most gastroenterology medical groups?
New York leads with 30 headquartered companies, followed by Houston (16) and Los Angeles (13).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 6,480 verified decision-maker contacts tracked across these 957 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.
Ready to reach these companies? Verified emails and direct dials for all 957 gastroenterology medical groups based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Gastroenterology medical groups by geography
Browse the directory
Browse: Companies home · All United States lists · All Gastroenterology medical groups lists · New lists
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Gastroenterology medical groups based in Australia
- Gastroenterology medical groups based in Brazil
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States