Largest gastroenterology groups in the US
- Groups
- 75
- Colon and Rectal Surgery groups
- 75
- Colon and rectal surgery specialists
- 171
- Physicians
- 251
- More than one site
- 25
There are 75 gastroenterology groups in the US with a Medicare PAC ID. Kansas City Joint Replacement and Sports Medicine is the largest, with 14 physicians.
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Kansas City Joint Replacement and Sports Medicine is the largest gastroenterology group in the US, with 14 physicians
Ranked by physicians linked to each group. Fairfax Colon & Rectal Surgery, PC is second with 14, and UMG General Surgery third with 9.
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
California has the most gastroenterology groups, with 8
Texas is second with 8 and Pennsylvania third with 6. Every state with 5 or more groups has its own list.
- California8
- Texas8
- Pennsylvania6
- Arizona5
- Georgia5
- Florida4
- Illinois4
- New York4
- Alabama3
- Indiana3
- Maryland3
- New Jersey3
- Nevada3
- Connecticut2
- Hawaii2
- Kansas2
- Michigan2
- Alaska1
- Kentucky1
- Louisiana1
- North Carolina1
- Oregon1
- South Carolina1
- Tennessee1
- Virginia1
Source: Doctors and Clinicians National Downloadable File (CMS)
HCA Healthcare has the most physicians in US gastroenterology groups, with 16 across 2 groups
1 parent organizations have two or more US gastroenterology groups. Each clinician counts once per parent organization.
See every medical group, site and clinician under HCA Healthcare
Org Hierarchy Explorer maps every group, site of care and clinician under the parent, with the leaders at each group.
Source: Dmand AI Org Hierarchy Data
For sales teams
Dmand AI maps the owners, administrators and physician leaders at each of the 75 US gastroenterology groups, with the parent organization above each one, and finds validated work emails and mobile numbers.
85% of US gastroenterology groups are independent, with no larger parent organization
A group counts as independent when no health system, platform or other organization sits above it in the org hierarchy. Every other group belongs to a larger organization.
US gastroenterology groups by ownership
- Independent64
- Health system or hospital10
- Other organization1
Sites of care beyond their own offices
See the parent organization above every US group
Dmand AI maps each group to the health system, physician platform or management company above it, so you can sell to the owner, not one site.
Source: Dmand AI Org Hierarchy Data
Each US gastroenterology group profile shows the parent, sites, clinicians and identifiers
- Clinicians and specialtiesA count by specialty and a sample of the group's cliniciansOn every profile
- Practice locationsMain site and a sample of practice locations, with a count of the restOn every profile
- Medicare Part B paymentsMedicare payments to the group, from CMSOn every profile
- Group NPI and Medicare PAC IDIdentifiers for matching records across sourcesOn every profile
- Parent organizationThe health system, platform or owner above the groupOn every profile
- Every clinician and siteThe full roster and every practice locationWith a free account
- Leader and clinician contactsWork emails and mobile numbers, found on request and then validatedWith a free account
- EHR used by the group's cliniciansThe EHR in use at the group's sitesWith a free account
Free account: 30 days free, self-serve, no credit card.
Sources: Doctors and Clinicians National Downloadable File (CMS), Medicare Physician & Other Practitioners (CMS) and Dmand AI Org Hierarchy Data
Sources for the US gastroenterology group list
| Data on this page | Source |
|---|---|
| Medical groups, specialties and sites | Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Professional Profile Data |
| Parent organizations and independence | Dmand AI Org Hierarchy Data |
| Physicians and HCPs | Dmand AI Affiliation Data |
| Group NPI and PAC ID | NPPES NPI Registry (CMS) and Doctors and Clinicians National Downloadable File (CMS) |
Data last refreshed October 2026Report an inaccuracyRemove my information
Groups whose main specialty is gastroenterology and that have a Medicare PAC ID.
FAQ
Frequently asked questions about US gastroenterology groups
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
How many gastroenterology groups are in the US?
There are 75 gastroenterology groups in the US with a Medicare PAC ID. Between them they have 171 colon and rectal surgery specialists.
Which state has the most gastroenterology groups?
California, with 8, followed by Texas with 8 and Pennsylvania with 6.
How many gastroenterology groups are independent?
64, or 85%, have no larger parent organization in the Dmand AI org hierarchy. 10 belong to a health system or hospital.
Dmand AI
Find the right contacts at every US gastroenterology group
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