Company lists · Data refreshed November 2026

Top 25 Internal medicine clinics worldwide

RevenueBase identified 4,448 company matches for internal medicine clinics worldwide as of November 2026 and tracks 59,802 professional contacts across them, including 12,728 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for internal medicine clinics worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for internal medicine clinics follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
4,448Companies
59,802Contacts tracked
12,728Verified emails
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The 25 largest internal medicine clinics worldwide

Ranked by team size
Top 25 of 4,448 company matches for internal medicine clinics worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchUnited StatesHQ recorded Nov 6, 20261,001-5,0002,534 contacts →

Exact match

“Summit Health helps patients with all of their primary care and specialty care needs.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchDoha, QatarHQ recorded Nov 6, 20265,001-10,0002,529 contacts →

Exact match

“Welcome to the page of Primary Health Care Corporation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchNewton, MA, United StatesHQ recorded Nov 6, 20265,001-10,0001,968 contacts →

Exact match

“Atrius Health, an innovative healthcare leader, delivers an effective system of connected care for adult and pediatric patients at 30 medical practice locations in eastern…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchSpringfield, IL, United StatesHQ recorded Nov 6, 20261,001-5,0001,652 contacts →

Exact match

“Springfield Clinic is dedicated to preserving the trusted patient-provider relationships we have carefully developed through 84 years of serving you with reliable, primary and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchMiami, FL, United StatesHQ recorded Nov 6, 20261,001-5,0001,020 contacts →

Exact match

“We’re transforming primary health care by improving the health of our patients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchHattiesburg, MS, United StatesHQ recorded Nov 6, 20261,001-5,000967 contacts →

Exact match

“Hattiesburg Clinic’s mission as a group practice is to provide high quality, patient-centered health care in an efficient and cost-effective manner.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLos Angeles, CA, United StatesHQ recorded Nov 6, 20261,001-5,000927 contacts →

Exact match

“Regal Medical Group, Lakeside Community Healthcare, ADOC Medical Group, and Community Surgery Center of Glendale – part of the Heritage Provider Network – is recognized as one of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchWesterville, OH, United StatesHQ recorded Nov 6, 20261,001-5,000798 contacts →

Exact match

“At Central Ohio Primary Care (COPC), we’re building something different: a healthcare model where people always come first, our patients and our team members.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchAugusta, AR, United StatesHQ recorded Nov 6, 20261,001-5,000661 contacts →

Exact match

“With a focus on customer health, community health, employee health, and organizational health, our mission of “health for all” is at the core of everything we do.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchPortland, ME, United StatesHQ recorded Nov 6, 2026501-1,000475 contacts →

Exact match

“InterMed is the largest physician-owned primary care practice in Maine, with 90 physicians and more than 650 non-physician employees.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchBuffalo, NY, United StatesHQ recorded Nov 6, 2026501-1,000464 contacts →

Exact match

“At Buffalo Medical Group, we offer care that goes beyond simply treating you when you’re sick.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchRocky Hill, CT, United StatesHQ recorded Nov 6, 2026501-1,000387 contacts →

Exact match

“Starling Physicians has over 300 providers who deliver care across 27 medical specialties in 30 convenient locations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchSikeston, MO, United StatesHQ recorded Nov 6, 2026501-1,000359 contacts →

Exact match

“Missouri Delta Medical Center has been providing comprehensive medical care to the people of Southeast Missouri since 1948.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchThe Villages, FL, United StatesHQ recorded Nov 6, 2026501-1,000338 contacts →

Exact match

“The Villages Health (soon becoming CenterWell Senior Primary Care) offers a revolutionary style of care that puts the patient at the center of their own well being!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchKebayoran, IndonesiaHQ recorded Nov 6, 2026n/a293 contacts →

Exact match

“Jaringan Klinik Digital #1 di Indonesia”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchAl-khobar, Saudi ArabiaHQ recorded Nov 6, 2026501-1,000284 contacts →

Exact match

“Late Mohammad Bin Hamad Ali Dossary, God bless his Soul, was one of the pioneer’s who implemented contracts for Saudi Arabia Oil Company (Aramco).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchSacramento, CA, United StatesHQ recorded Nov 6, 2026201-500281 contacts →

Exact match

“One Community Health is a primary healthcare and specialty care provider dedicated to improving the health and well-being of our community.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchProvidence, RI, United StatesHQ recorded Nov 6, 2026501-1,000259 contacts →

Exact match

“A member of the Lifespan health system, Coastal Medical is a primary care driven practice serving over patients with a team of 150 clinicians located in medical offices across…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchProvidence, RI, United StatesHQ recorded Nov 6, 2026501-1,000254 contacts →

Exact match

“Established in 1968, we are the largest primary health care provider in Providence and treat patients regardless of their ability to pay.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchQuito, EcuadorHQ recorded Nov 6, 2026201-500243 contacts →

Exact match

“SIME Sistemas Médicos nace en el año 1996.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchScottsdale, AZ, United StatesHQ recorded Nov 6, 2026501-1,000227 contacts →

Exact match

“Optima Medical is an Arizona-based medical group consisting of 30 locations and over 130+ medical providers, who care for more than patients statewide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchFort Walton Beach, FL, United StatesHQ recorded Nov 6, 2026201-500221 contacts →

Exact match

“White-Wilson Medical Center is a multi-specialty healthcare organization committed to providing high-quality, patient-centered care to the communities we serve.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchGreensboro, NC, United StatesHQ recorded Nov 6, 2026201-500193 contacts →

Exact match

“Nationally Recognized Patient Medical Home in Greensboro, NC If having a lifetime of good health is important to you and your loved ones, you owe it to yourself to learn more…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSelinsgrove, PA, United StatesHQ recorded Nov 6, 20261,001-5,000167 contacts →

Exact match

“Family Practice Center, PC is an independent physician owned primary care organization in Central Pennsylvania.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchHeemstede, NetherlandsHQ recorded Nov 6, 2026201-500166 contacts →

Exact match

“Snel, Persoonlijk & Verzekerd zonder eigen bijdrage.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 4,448 internal medicine clinics worldwide

See the full list, filter by size, metro and specialty, and access 12,728 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Internal medicine clinics worldwide at a glance

As of Nov 6, 2026
21.3%Verified-email coverage
13.4Average contacts per company
1-10Median size (employees)
0.8%Largest-city concentration · Houston
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
2,290
11-50
1,401
51-200
387
201-500
120
501-1,000
38
1,001-5,000
23
5,001-10,000
3
10001+
5

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage
Every country. Country and city lists for internal medicine clinics are linked below.
What qualifies
Company records worldwide whose business descriptions match “internal medicine clinics” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 12,728 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Internal medicine clinics by location

7 lists · largest first

Every Internal medicine clinics list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “internal medicine clinics”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many internal medicine clinics are there worldwide?

RevenueBase identified 4,448 company matches for internal medicine clinics worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Summit Health tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most internal medicine clinics?

The United States leads with 2,248 companies, followed by Australia (204) and the Netherlands (145). Every internal medicine clinics list by country and city is linked on this page.

Which city has the most internal medicine clinics?

Houston leads with 37 company records, followed by New York (36) and Sao Paulo (29).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 12,728 professional contacts with verified work emails tracked across these 4,448 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.