Company lists · Data refreshed September 2026

Top 25 Primary care medical groups based in the United States

Name: Primary care medical groups based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 7,066 companies tracked

RevenueBase identified 7,066 primary care medical groups headquartered in the United States as of September 2026 and tracks 637,111 professional contacts across them, including 159,976 with verified work emails. New York is the largest hub.

This list covers primary care 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 17, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

7,066Companies

637,111Contacts tracked

159,976Verified emails

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The 25 largest primary care medical groups based in the United States

Ranked by team size

Top 25 of 7,066 primary care medical groups based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to primary care medical groups: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Kaiser Permanente	Partial evidence	Oakland, CA, United StatesHQ checked Sep 17, 2026	10001+	116,185 contacts →
	Partial evidence “At the heart of health care, you’ll find Kaiser Permanente.” Source: RevenueBase Database · checked Sep 17, 2026
2	Mayo Clinic	Indirect evidence	Rochester, MN, United StatesHQ checked Sep 17, 2026	10001+	44,446 contacts →
	Indirect evidence “Mayo Clinic has expanded and changed in many ways, but our values remain true to the vision of our founders.” Source: RevenueBase Database · checked Sep 17, 2026
3	Baylor Scott & White Health	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 17, 2026	10001+	25,184 contacts →
	Indirect evidence “With us by your side, there's no stopping you.” Source: RevenueBase Database · checked Sep 17, 2026
4	Uchealth	Indirect evidence	Aurora, CO, United StatesHQ checked Sep 17, 2026	10001+	18,089 contacts →
	Indirect evidence “At UCHealth, we do things differently.” Source: RevenueBase Database · checked Sep 17, 2026
5	Dignity Health	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 17, 2026	10001+	16,993 contacts →
	Partial evidence “We provide quality, compassionate health care at more than 40 hospitals and care centers that are serving communities across California, Arizona and Nevada every minute of every…” Source: RevenueBase Database · checked Sep 17, 2026
6	Wellstar Health System	Indirect evidence	Marietta, GA, United StatesHQ checked Sep 17, 2026	10001+	15,788 contacts →
	Indirect evidence “At Wellstar Health System, our mission is to enhance the health and well-being of every person we serve.” Source: RevenueBase Database · checked Sep 17, 2026
7	Fairview Health Services	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 2026	10001+	10,102 contacts →
	Indirect evidence “Fairview Health Services is Minnesota’s choice for healthcare.” Source: RevenueBase Database · checked Sep 17, 2026
8	Wellspan Health	Partial evidence	York, PA, United StatesHQ checked Sep 17, 2026	10001+	9,956 contacts →
	Partial evidence “WellSpan Health’s vision is to reimagine healthcare through the delivery of comprehensive, equitable health and wellness solutions throughout our continuum of care.” Source: RevenueBase Database · checked Sep 17, 2026
9	Florida Hospital	Partial evidence	Altamonte Springs, FL, United StatesHQ checked Sep 17, 2026	10001+	8,954 contacts →
	Partial evidence “This is whole-person care.” Source: RevenueBase Database · checked Sep 17, 2026
10	Carilion Clinic	Strong evidence	Roanoke, VA, United StatesHQ checked Sep 17, 2026	10001+	7,967 contacts →
	Strong evidence “Carilion Clinic is a non-profit health care organization serving nearly one million people in Virginia through hospitals, outpatient specialty centers and advanced primary care…” Source: RevenueBase Database · checked Sep 17, 2026
11	Parkview Health	Indirect evidence	Fort Wayne, IN, United StatesHQ checked Sep 17, 2026	10001+	6,857 contacts →
	Indirect evidence “Parkview Health is northeast Indiana’s largest not-for-profit healthcare provider, guided by a mission to improve the health of the communities we serve.” Source: RevenueBase Database · checked Sep 17, 2026
12	Healthpartners	Partial evidence	Bloomington, MN, United StatesHQ checked Sep 17, 2026	10001+	6,161 contacts →
	Partial evidence “HealthPartners, an integrated health care organization providing health care services and health plan financing and administration, was founded in 1957 as a cooperative.” Source: RevenueBase Database · checked Sep 17, 2026
13	Trihealth	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 17, 2026	10001+	6,115 contacts →
	Indirect evidence “The mission of TriHealth is to improve the health status of the people we serve.” Source: RevenueBase Database · checked Sep 17, 2026
14	Healthsouth	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 17, 2026	10001+	5,286 contacts →
	Indirect evidence “Formerly HealthSouth and Encompass Home Health & Hospice, we have combined our strengths as Encompass Health.” Source: RevenueBase Database · checked Sep 17, 2026
15	OAK Street Health, Part Of CVS Health	Strong evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,950 contacts →
	Strong evidence “Oak Street Health is a network of value-based primary care centers serving older adults on Medicare.” Source: RevenueBase Database · checked Sep 17, 2026
16	Summa Health	Indirect evidence	Akron, OH, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,851 contacts →
	Indirect evidence “Summa Health is one of the largest integrated delivery systems in Ohio.” Source: RevenueBase Database · checked Sep 17, 2026
17	The Christ Hospital Health Network	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,756 contacts →
	Partial evidence “The Christ Hospital Health Network is a regional system of care that extends The Christ Hospital's 130 years of exceptional care and leadership to more than 100 locations in the…” Source: RevenueBase Database · checked Sep 17, 2026
18	Gundersen Health System	Indirect evidence	La Crosse, WI, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,595 contacts →
	Indirect evidence “We united with Bellin Health in 2022 to form Emplify Health.” Source: RevenueBase Database · checked Sep 17, 2026
19	Lahey Hospital & Medical Center	Partial evidence	Burlington, MA, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,441 contacts →
	Partial evidence “Lahey Hospital & Medical Center, part of Beth Israel Lahey Health, is a physician-led, nonprofit, group practice.” Source: RevenueBase Database · checked Sep 17, 2026
20	Sutter Health	Strong evidence	Mountain View, CA, United StatesHQ checked Sep 17, 2026	5,001-10,000	3,958 contacts →
	Strong evidence “Palo Alto Medical Foundation (PAMF), a not-for-profit health care organization, providing operational and administrative support, including the latest technology, allowing…” Source: RevenueBase Database · checked Sep 17, 2026
21	Mcleod Health	Partial evidence	Florence, SC, United StatesHQ checked Sep 17, 2026	10001+	3,709 contacts →
	Partial evidence “McLeod Health is the region's destination for medical excellence.” Source: RevenueBase Database · checked Sep 17, 2026
22	Atlanticare	Indirect evidence	Atlantic City, NJ, United StatesHQ checked Sep 17, 2026	5,001-10,000	3,595 contacts →
	Indirect evidence “AtlantiCare is an integrated system of services designed to help people achieve optimal health.” Source: RevenueBase Database · checked Sep 17, 2026
23	ONE Medical	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	3,526 contacts →
	Strong evidence “One Medical challenges the notion that delivering high-quality, accessible health care is unachievable and prohibitively expensive.” Source: RevenueBase Database · checked Sep 17, 2026
24	Advocate Health	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 17, 2026	10001+	3,455 contacts →
	Partial evidence “Advocate Health is redefining how, when and where care is delivered to help people live well.” Source: RevenueBase Database · checked Sep 17, 2026
25	Sparrow Health System	Indirect evidence	Lansing, MI, United StatesHQ checked Sep 17, 2026	5,001-10,000	3,309 contacts →
	Indirect evidence “We are now University of Michigan Health-Sparrow.” Source: RevenueBase Database · checked Sep 17, 2026

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: primary care 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 primary care medical groups.
Partial evidence: Its own public description names part of primary care medical groups, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name primary care 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 7,066 primary care medical groups based in the United States

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Primary care medical groups based in the United States at a glance

As of Sep 17, 2026

25.1%Verified-email coverage

90.2Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

3,224

11-50

2,095

51-200

826

201-500

389

501-1,000

203

1,001-5,000

183

5,001-10,000

10001+

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 7,066 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 primary care 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 “primary care 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 primary care 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 primary care 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, 159,976 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 17, 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.

Primary care medical groups by metro

Primary care medical groups in New York112
Primary care medical groups in Houston96
Primary care medical groups in Miami73
Primary care medical groups in Dallas54
Primary care medical groups in Chicago52
Primary care medical groups in Los Angeles52
Primary care medical groups in San Antonio49
Primary care medical groups in Las Vegas47
Primary care medical groups in Austin43
Primary care medical groups in Tampa38
Primary care medical groups in Orlando37
Primary care medical groups in Phoenix33
Primary care medical groups in San Diego31
Primary care medical groups in Atlanta30
Primary care medical groups in Portland30
Primary care medical groups in Columbia27
Primary care medical groups in Nashville26
Primary care medical groups in Washington26
Primary care medical groups in Charlotte25

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 primary care 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 primary care medical groups are there based in the United States?

RevenueBase identified 7,066 primary care 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?

Kaiser Permanente, headquartered in Oakland, tops this list with the largest team on record.

Which city has the most primary care medical groups?

New York leads with 112 headquartered companies, followed by Houston (96) and Miami (73).

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 159,976 verified decision-maker contacts tracked across these 7,066 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 17, 2026.

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Related lists

Primary care medical groups by geography

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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.