Company lists · Data refreshed October 2026

Top 25 Clinical oncology practices worldwide

RevenueBase identified 799 company matches for clinical oncology practices worldwide as of October 2026 and tracks 30,946 professional contacts across them, including 6,706 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for clinical oncology practices 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 October 9, 2026. Country and city lists for clinical oncology practices 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 Oct 9, 2026 How this list was built
799Companies
30,946Contacts tracked
6,706Verified emails
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The 25 largest clinical oncology practices worldwide

Ranked by team size
Top 25 of 799 company matches for clinical oncology practices worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 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 matchFort Myers, FL, United StatesHQ recorded Oct 9, 20261,001-5,0002,652 contacts →

Exact match

“Founded in 1984, Florida Cancer Specialists & Research Institute (FCS) is the largest independent medical oncology/hematology practice in the United States.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2Exact matchPort Jefferson Station, NY, United StatesHQ recorded Oct 9, 20261,001-5,000791 contacts →

Exact match

“As a comprehensive community oncology center, NYCBS delivers world-class cancer care close to home.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3Exact matchAlexandria, VA, United StatesHQ recorded Oct 9, 2026201-500770 contacts →

Exact match

“Founded in 1964, the American Society of Clinical Oncology (ASCO) is committed to making a world of difference in cancer care.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4Exact matchLouisville, KY, United StatesHQ recorded Oct 9, 2026501-1,000700 contacts →

Exact match

“Onco360 is recognized as one of the nation's leading independent specialty pharmacies dedicated exclusively to oncology and rare disease patients.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5Exact matchLittle Rock, AR, United StatesHQ recorded Oct 9, 2026501-1,000633 contacts →

Exact match

“CARTI is a not-for-profit, multidisciplinary cancer care provider offering leading-edge medical, radiation and surgical oncology, interventional radiology, as well as an array of…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6Exact matchFort Myers, FL, United StatesHQ recorded Oct 9, 20261,001-5,000549 contacts →

Exact match

“AON is an alliance of physicians and veteran healthcare leaders dedicated to ensuring the long-term success and viability of oncology diagnosis and treatment in community-based…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7Exact matchPereira, ColombiaHQ recorded Oct 9, 2026501-1,000381 contacts →

Exact match

“Somos la institución de mayor integralidad en la atención del paciente oncológico en el Eje Cafetero colombiano.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8Exact matchUnited StatesHQ recorded Oct 9, 2026501-1,000315 contacts →

Exact match

“Georgia Cancer Specialists is a Top 10 private cancer practice in the U.S.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9Exact matchCerritos, CA, United StatesHQ recorded Oct 9, 2026501-1,000308 contacts →

Exact match

“Founded in 2007, The Oncology Institute of Hope and Innovation (TOI) is advancing oncology by delivering highly specialized, value-based cancer care in the community setting.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10Exact matchHouston, TX, United StatesHQ recorded Oct 9, 2026201-500285 contacts →

Exact match

“Oncology Consultants has been a premiere adult medical oncology and hematology practice in Houston, TX since 1982.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11Exact matchRio De Janeiro, BrazilHQ recorded Oct 9, 2026201-500260 contacts →

Exact match

“Com quase três décadas de experiência no combate ao câncer, oferecemos uma linha completa de cuidados, do diagnóstico ao tratamento, em um modelo de assistência que une…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12Exact matchSan Antonio, TX, United StatesHQ recorded Oct 9, 2026201-500258 contacts →

Exact match

“At The START Center for Cancer Care our mission is to deliver high-quality care for our patients, accelerate the development of new cancer treatments, and provide hope for those…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13Exact matchTigard, OR, United StatesHQ recorded Oct 9, 2026201-500245 contacts →

Exact match

“Join the Compass Family!”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14Exact matchHuntsville, AL, United StatesHQ recorded Oct 9, 2026201-500244 contacts →

Exact match

“Clearview Cancer Institute is north Alabama's leading cancer treatment facility.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15Exact matchEdmonton, AB, CanadaHQ recorded Oct 9, 2026201-500241 contacts →

Exact match

“TRIO is a unique, full-service oncology clinical research organization (CRO) that leverages the strengths of our worldwide network of Investigators, academic leaders, patient…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16Exact matchTeaneck, NJ, United StatesHQ recorded Oct 9, 2026501-1,000220 contacts →

Exact match

“Regional Cancer Care Associates LLC (RCCA), one of the largest oncology physician networks in the United States, is transforming oncology care by ensuring that cancer patients…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17Exact matchCincinnati, OH, United StatesHQ recorded Oct 9, 2026201-500207 contacts →

Exact match

“When you hear the word cancer, start here.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18Exact matchBrno, Czech RepublicHQ recorded Oct 9, 20261,001-5,000207 contacts →

Exact match

“Masaryk Memorial Cancer Institute (MMCI) in Brno is a specialized comprehensive cancer center with supraregional activity that is certified by two quality certificates – by Joint…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19Exact matchPeoria, IL, United StatesHQ recorded Oct 9, 2026201-500205 contacts →

Exact match

“Illinois CancerCare is one of the largest private oncology and hematology practices in Illinois and in the entire nation.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20Exact matchTulsa, OK, United StatesHQ recorded Oct 9, 2026201-500202 contacts →

Exact match

“Oklahoma Cancer Specialists and Research Institute offers the region’s most comprehensive cancer care.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21Exact matchSan Diego, United StatesHQ recorded Oct 9, 2026201-500176 contacts →

Exact match

“California Cancer Associates for Research and Excellence (cCARE), is the largest full-service, private oncology practice in California.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22Exact matchBrazilHQ recorded Oct 9, 202651-200162 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23Exact matchCape Town, South AfricaHQ recorded Oct 9, 2026201-500155 contacts →

Exact match

“Icon Oncology is a nationwide network of oncology specialists, committed to widening access to quality cancer care in South Africa.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24Exact matchEast Syracuse, NY, United StatesHQ recorded Oct 9, 2026201-500150 contacts →

Exact match

“What makes our practice truly special is that everyone at HOA is “united in spirit” – a spirit that is utterly un-crushable and filled with possibilities and hope.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25Exact matchIndiaHQ recorded Oct 9, 2026501-1,000148 contacts →

Exact match

“Bhagwan Mahaveer Cancer Hospital and Research Centre, Jaipur (BMCHRC) came into existence in the year 1997 with initial bed strength of 50 beds as a beginning.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase

Showing 25 of 799 clinical oncology practices worldwide

See the full list, filter by size, metro and specialty, and access 6,706 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Clinical oncology practices worldwide at a glance

As of Oct 9, 2026
21.7%Verified-email coverage
38.7Average contacts per company
11-50Median size (employees)
2.0%Largest-city concentration · Sao Paulo
Oct 9, 2026Page data refreshed

Companies by employee count

1-10
262
11-50
247
51-200
141
201-500
76
501-1,000
39
1,001-5,000
20
5,001-10,000
8

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 clinical oncology practices are linked below.
What qualifies
Company records worldwide whose business descriptions match “clinical oncology practices” 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 6,706 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 October 9, 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.

Clinical oncology practices by location

2 lists · largest first

Every Clinical oncology practices list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 “clinical oncology practices”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clinical oncology practices are there worldwide?

RevenueBase identified 799 company matches for clinical oncology practices worldwide as of October 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?

Florida Cancer Specialists & Research Institute tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most clinical oncology practices?

The United States leads with 257 companies, followed by Brazil (124). Every clinical oncology practices list by country and city is linked on this page.

Which city has the most clinical oncology practices?

Sao Paulo leads with 16 company records, followed by Fortaleza (7) and Madrid (7).

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 6,706 professional contacts with verified work emails tracked across these 799 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 October 9, 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.