Largest gastroenterology groups in California
- Groups
- 8
- Colon and Rectal Surgery groups
- 8
- Colon and rectal surgery specialists
- 15
- Physicians
- 25
- More than one site
- 2
There are 8 gastroenterology groups in California with a Medicare PAC ID. Sacramento Colon and Rectal Surgery is the largest, with 6 physicians.
Find the decision makers at all 8 California gastroenterology groups
Work emails and mobile numbers for practice owners, administrators and physician leaders, found through healthcare waterfall enrichment, with a free Dmand AI account.
Sacramento Colon and Rectal Surgery is the largest gastroenterology group in California, with 6 physicians
Ranked by physicians with a California address linked to each group. Tam H. Le, MD is second with 4, and Valley Colorectal Surgeons third with 4.
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Sort and filter all 8 California gastroenterology groups by city, parent organization, group size, EHR in use and decision makers in Dmand AI.
| # | Medical group | Parent organization | Physicians | HCPs | Decision makers |
|---|---|---|---|---|---|
| 1 | Sacramento Colon and Rectal SurgerySacramento · 2 sites | - | 6 | 6 | Decision makers |
| 2 | Tam H. Le, MDFountain Valley · 2 sites | Parent on file | 4 | 4 | Decision makers |
| 3 | Valley Colorectal SurgeonsEncino · 1 site | - | 4 | 4 | Decision makers |
| 4 | The Surgery Group of Los AngelesLos Angeles · 1 site | - | 3 | 3 | Decision makers |
| 5 | Colorectal Surgery InstituteGlendale · 1 site | - | 2 | 3 | Decision makers |
| 6 | South Orange County Gastroenterology, Inc.Mission Viejo · 1 site | Parent on file | 2 | 3 | Decision makers |
| 7 | Surgical Precision Surgery AssociatesApple Valley · 1 site | - | 2 | 3 | Decision makers |
| 8 | Armen Gregorian, MDGlendale · 1 site | - | 2 | 2 | Decision makers |
Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data
75% of California 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.
California gastroenterology groups by ownership
- Independent6
- Health system or hospital2
See the parent organization above every California 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
For sales teams
Dmand AI maps the owners, administrators and physician leaders at each of the 8 California gastroenterology groups, with the parent organization above each one, and finds validated work emails and mobile numbers.
Glendale has the most gastroenterology groups in California, with 2
More California cities with gastroenterology groups
- Sacramento1
Source: Doctors and Clinicians National Downloadable File (CMS)
Each California 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 California 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 gastroenterology groups in California
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 California?
There are 8 gastroenterology groups in California with a Medicare PAC ID. Between them they have 15 colon and rectal surgery specialists.
How many California gastroenterology groups are independent?
6, or 75%, have no larger parent organization in the Dmand AI org hierarchy. 2 belong to a health system or hospital.
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