Company lists · Data refreshed November 2026

Top 25 Ambulatory care networks worldwide

RevenueBase identified 4,938 company matches for ambulatory care networks worldwide as of November 2026 and tracks 336,192 professional contacts across them, including 61,271 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for ambulatory care networks 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 ambulatory care networks 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
4,938Companies
336,192Contacts tracked
61,271Verified emails
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The 25 largest ambulatory care networks worldwide

Ranked by team size
Top 25 of 4,938 company matches for ambulatory care networks 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 matchChennai, IndiaHQ recorded Nov 6, 202610001+27,262 contacts →

Exact match

“Driven by the vision of its Chairman, Dr.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchMarietta, GA, United StatesHQ recorded Nov 6, 202610001+16,508 contacts →

Exact match

“At Wellstar Health System, our mission is to enhance the health and well-being of every person we serve.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 20265,001-10,00010,335 contacts →

Exact match

“UCSF Health is an integrated health care network encompassing several entities, including UCSF Medical Center, one of the nation’s top 10 hospitals according to U.S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchFranklin, TN, United StatesHQ recorded Nov 6, 202610001+9,433 contacts →

Exact match

“Community Health Systems is one of the nation's leading healthcare providers.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchBangalore, IndiaHQ recorded Nov 6, 202610001+8,096 contacts →

Exact match

“Narayana Health Group is India’s leading healthcare provider and one of the largest hospital groups in the country with a network of 21 hospitals, 5 heart centers, and 19 primary…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchİstanbul, TürkiyeHQ recorded Nov 6, 202610001+8,054 contacts →

Exact match

“The Acıbadem Healthcare Group is Turkey’s most valuable private healthcare organisation according to brand assessment results and the position the group has achieved in the sector.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchSantiago, ChileHQ recorded Nov 6, 20265,001-10,0005,622 contacts →

Exact match

“Bienvenido a Clínica Alemana de Santiago.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchBirmingham, United StatesHQ recorded Nov 6, 202610001+5,508 contacts →

Exact match

“Formerly HealthSouth and Encompass Home Health & Hospice, we have combined our strengths as Encompass Health.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchChicago, IL, United StatesHQ recorded Nov 6, 20265,001-10,0005,148 contacts →

Exact match

“Oak Street Health is a network of value-based primary care centers serving older adults on Medicare.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBurlington, MA, United StatesHQ recorded Nov 6, 20265,001-10,0004,333 contacts →

Exact match

“Lahey Hospital & Medical Center, part of Beth Israel Lahey Health, is a physician-led, nonprofit, group practice.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact 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
12Exact 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
13Exact matchWest Reading, PA, United StatesHQ recorded Nov 6, 202610001+2,433 contacts →

Exact match

“Tower Health is a vibrant, nationally recognized health system that serves a population of nearly 2.5 million people.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchAtlanta, MI, United StatesHQ recorded Nov 6, 20265,001-10,0002,374 contacts →

Exact match

“For over 50 years, SCP Health has been serving patients in moments that matter, prioritizing improved patient outcomes and sustainable clinical operations in emergency, hospital…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchKuala Lumpur, MalaysiaHQ recorded Nov 6, 202610001+2,352 contacts →

Exact match

“Since its inception in 1981 as the first private specialist hospital in Johor, KPJ Healthcare has served communities and neighbourhoods nationwide for over 40 years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchPensacola, FL, United StatesHQ recorded Nov 6, 20261,001-5,0002,186 contacts →

Exact match

“Baptist Health Care is a not-for-profit health care organization based in northwest Florida that is committed to helping people throughout life’s journey.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchBuenos Aires, ArgentinaHQ recorded Nov 6, 20261,001-5,0002,036 contacts →

Exact match

“Hoy como en nuestros inicios, hace más de 4 décadas, logramos que MEDICUS continúe destacándose como empresa líder en el ámbito de la medicina privada, manteniendo siempre el alto…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchGermantown, MD, United StatesHQ recorded Nov 6, 2026n/a1,990 contacts →

Exact match

“MEP is an emergency and outpatient care partner for hospitals, owned and managed by its practitioners.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact 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
20Exact matchCuritiba, BrazilHQ recorded Nov 6, 20261,001-5,0001,745 contacts →

Exact match

“A Unimed Curitiba é uma cooperativa de trabalho médico líder no mercado de assistência à saúde em sua área de atuação.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact 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
22Exact matchBristol, United KingdomHQ recorded Nov 6, 20265,001-10,0001,650 contacts →

Exact match

“Practice Plus Group is passionate about great healthcare.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchIsmaning, GermanyHQ recorded Nov 6, 202610001+1,602 contacts →

Exact match

“Die Sana Kliniken AG ist ein führender integrierter Gesundheitsdienstleister im deutschsprachigen Raum.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchChicago, TX, United StatesHQ recorded Nov 6, 202610001+1,527 contacts →

Exact match

“VillageMD provides high-quality, accessible healthcare services for individuals and communities across the United States, with primary, multi-specialty, and urgent care providers…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchDowners Grove, IL, United StatesHQ recorded Nov 6, 20261,001-5,0001,517 contacts →

Exact match

“Are you ready to challenge the expected to deliver the extraordinary?”

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

Showing 25 of 4,938 ambulatory care networks worldwide

See the full list, filter by size, metro and specialty, and access 61,271 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Ambulatory care networks worldwide at a glance

As of Nov 6, 2026
18.2%Verified-email coverage
68.1Average contacts per company
11-50Median size (employees)
1.3%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
1,671
11-50
1,503
51-200
781
201-500
397
501-1,000
197
1,001-5,000
195
5,001-10,000
28
10001+
43

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 ambulatory care networks are linked below.
What qualifies
Company records worldwide whose business descriptions match “ambulatory care networks” 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 61,271 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.

Ambulatory care networks by location

21 lists · largest first

Every Ambulatory care networks 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 “ambulatory care networks”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many ambulatory care networks are there worldwide?

RevenueBase identified 4,938 company matches for ambulatory care networks 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?

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

Which country has the most ambulatory care networks?

The United States leads with 1,333 companies, followed by the United Kingdom (364) and Brazil (312). Every ambulatory care networks list by country and city is linked on this page.

Which city has the most ambulatory care networks?

London leads with 62 company records, followed by Dubai (31) and Sao Paulo (28).

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 61,271 professional contacts with verified work emails tracked across these 4,938 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.