Company lists · Data refreshed September 2026
Top 25 Primary care medical groups worldwide
RevenueBase identified 13,221 primary care medical groups worldwide as of September 2026 and tracks 805,838 professional contacts across them, including 178,096 with verified work emails and 0 with mobile numbers. The United States is the largest market and New York the largest hub.
This list covers primary care medical groups worldwide, 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. Country and city lists for primary care medical groups follow the table.
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 primary care medical groups worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 116,185 contacts → | ||||
Partial evidence “At the heart of health care, you’ll find Kaiser Permanente.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | 25,558 contacts → | ||||
Indirect evidence “Driven by the vision of its Chairman, Dr.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 4 | 25,184 contacts → | ||||
Indirect evidence “With us by your side, there's no stopping you.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 5 | 18,089 contacts → | ||||
Indirect evidence “At UCHealth, we do things differently.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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, 2026Thanks. The Data Team will review it. | |||||
| 8 | 10,102 contacts → | ||||
Indirect evidence “Fairview Health Services is Minnesota’s choice for healthcare.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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, 2026Thanks. The Data Team will review it. | |||||
| 10 | 8,954 contacts → | ||||
Partial evidence “This is whole-person care.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5,779 contacts → | ||||
Partial evidence “UAE’s largest healthcare network, offering integrated patient-centric care.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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, 2026Thanks. The Data Team will review it. | |||||
| 17 | 5,224 contacts → | ||||
Indirect evidence “Bienvenido a Clínica Alemana de Santiago.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 18 | 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, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4,851 contacts → | ||||
Indirect evidence “Summa Health is one of the largest integrated delivery systems in Ohio.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4,595 contacts → | ||||
Indirect evidence “We united with Bellin Health in 2022 to form Emplify Health.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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, 2026Thanks. The Data Team will review it. | |||||
| 23 | 4,350 contacts → | ||||
Indirect evidence “Bienvenidos a Red Dávila, contamos con la mejor atención y trabajamos con los más altos estándares de calidad en todo nuestro actuar.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 24 | 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, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3,709 contacts → | ||||
Partial evidence “McLeod Health is the region's destination for medical excellence.” Source: RevenueBase Database · checked Sep 17, 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: 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 13,221 primary care medical groups worldwide
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Primary care medical groups worldwide at a glance
As of Sep 17, 2026Companies by employee count
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.
- Coverage
- 25 countries, largest first: the United States, Australia, the United Kingdom, Brazil, Canada, the Netherlands, India, Germany, the United Arab Emirates, Spain and 15 more. Country and city lists for primary care medical groups are linked below.
- What qualifies
- Companies worldwide 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.
- 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, 178,096 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 location
45 lists · largest firstEvery Primary care medical groups list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Primary care medical groups based in the United States7,066
- Primary care medical groups based in Australia859
- Primary care medical groups based in the United Kingdom781
- Primary care medical groups based in Brazil723
- Primary care medical groups based in Canada601
- Primary care medical groups based in the Netherlands599
- Primary care medical groups based in India348
- Primary care medical groups based in Germany315
- Primary care medical groups based in the United Arab Emirates182
- Primary care medical groups based in Spain181
- Primary care medical groups based in Sweden176
- Primary care medical groups based in Italy157
- Primary care medical groups based in Belgium145
- Primary care medical groups based in France132
- Primary care medical groups based in Switzerland131
- Primary care medical groups based in Portugal130
- Primary care medical groups based in Poland114
- Primary care medical groups based in New Zealand97
- Primary care medical groups based in Colombia88
- Primary care medical groups based in Chile81
- Primary care medical groups based in Argentina80
- Primary care medical groups based in Saudi Arabia76
- Primary care medical groups based in Indonesia62
- Primary care medical groups based in South Africa51
- Primary care medical groups based in the Philippines46
Cities
- Primary care medical groups based in New York, United States112
- Primary care medical groups based in Houston, United States96
- Primary care medical groups based in Sao Paulo, Brazil85
- Primary care medical groups based in Miami, United States73
- Primary care medical groups based in Dallas, United States54
- Primary care medical groups based in Chicago, United States52
- Primary care medical groups based in Los Angeles, United States52
- Primary care medical groups based in Calgary, Canada51
- Primary care medical groups based in San Antonio, United States49
- Primary care medical groups based in Toronto, Canada49
- Primary care medical groups based in Las Vegas, United States47
- Primary care medical groups based in Austin, United States43
- Primary care medical groups based in Tampa, United States38
- Primary care medical groups based in Phoenix, United States33
- Primary care medical groups based in San Diego, United States31
- Primary care medical groups based in Atlanta, United States30
- Primary care medical groups based in Portland, United States30
- Primary care medical groups based in Nashville, United States26
- Primary care medical groups based in Washington, United States26
- Primary care medical groups based in Charlotte, United States25
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 worldwide?
RevenueBase identified 13,221 primary care medical groups worldwide 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 country has the most primary care medical groups?
The United States leads with 7,066 companies, followed by Australia (859) and the United Kingdom (781). Every primary care medical groups list by country and city is linked on this page.
Which city has the most primary care medical groups?
New York leads with 112 headquartered companies, followed by Houston (96) and London (93).
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 178,096 verified decision-maker contacts tracked across these 13,221 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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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.