Company lists · Data refreshed November 2026

Top 25 Oncology medical groups worldwide

RevenueBase identified 1,911 company matches for oncology medical groups worldwide as of November 2026 and tracks 145,378 professional contacts across them, including 24,143 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for oncology medical groups 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 oncology medical groups 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
1,911Companies
145,378Contacts tracked
24,143Verified emails
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The 25 largest oncology medical groups worldwide

Ranked by team size
Top 25 of 1,911 company matches for oncology medical groups 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 matchHouston, TX, United StatesHQ recorded Nov 6, 202610001+20,862 contacts →

Exact match

“The University of Texas MD Anderson Cancer Center is one of the world’s most respected centers devoted exclusively to cancer patient care, research, education and prevention.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchSão Paulo, BrazilHQ recorded Nov 6, 20265,001-10,0006,836 contacts →

Exact match

“Você sabe a diferença entre um Cancer Center e um hospital geral?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchSeattle, WA, United StatesHQ recorded Nov 6, 20261,001-5,0005,208 contacts →

Exact match

“Fred Hutch is an independent, nonprofit organization that also serves as the cancer program for UW Medicine.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBarretos, BrazilHQ recorded Nov 6, 20261,001-5,0003,072 contacts →

Exact match

“Na década de 1960, o único hospital especializado para tratamento de câncer estava na capital do estado de São Paulo e os pacientes que apareciam com a doença, no Hospital São…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchFort Myers, FL, United StatesHQ recorded Nov 6, 20261,001-5,0002,714 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 · Nov 6, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,0002,037 contacts →

Exact match

“We're doing whatever it takes to help more people with cancer get the best care the UK has to offer, whoever and wherever they are.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchSydney, AustraliaHQ recorded Nov 6, 20261,001-5,0002,022 contacts →

Exact match

“GenesisCare is a provider of integrated cancer care in Australia, Spain, and the U.K.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchAbu Dhabi, United Arab EmiratesHQ recorded Nov 6, 20261,001-5,0001,812 contacts →

Exact match

“Burjeel Medical City is the largest medical care facility under the banner of Burjeel Holdings.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchVincennes, IN, United StatesHQ recorded Nov 6, 20261,001-5,0001,730 contacts →

Exact match

“For more than 100 years, Good Samaritan has been a health care leader in southwestern Indiana and southeastern Illinois.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBrisbane, AustraliaHQ recorded Nov 6, 20261,001-5,0001,559 contacts →

Exact match

“Icon Group is a leading integrated healthcare provider with global reach across Australia, New Zealand, ASEAN, the United Kingdom and Germany.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchCuritiba, BrazilHQ recorded Nov 6, 20261,001-5,0001,144 contacts →

Exact match

“Nos anos de 1920 o câncer era tratado - tanto para médicos, quanto para a sociedade em geral – com tabu, mas o médico Erasto Gaertner via a doença com outros olhos.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchBangalore, IndiaHQ recorded Nov 6, 20261,001-5,0001,102 contacts →

Exact match

“HealthCare Global Enterprises Ltd, headquartered in Bangalore is India's largest Cancer Care Provider.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchRio De Janeiro, BrazilHQ recorded Nov 6, 20261,001-5,000840 contacts →

Exact match

“Fundada em 2011, a Oncologia D’Or é composta por clínicas focadas no diagnóstico e tratamento do câncer e de doenças hematológicas, com padrão de qualidade reconhecido…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchPort Jefferson Station, NY, United StatesHQ recorded Nov 6, 20261,001-5,000816 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchL'hospitalet De Llobregat, SpainHQ recorded Nov 6, 20261,001-5,000772 contacts →

Exact match

“L’Institut Català d’Oncologia (ICO) és un centre públic, dedicat exclusivament al càncer, que depèn del Departament de Salut del govern autonòmic de Catalunya (Espanya).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchAnderlecht, BelgiumHQ recorded Nov 6, 20261,001-5,000741 contacts →

Exact match

“VERSION FRANCAISE Centre multidisciplinaire intégré, unique en Belgique et reconnu internationalement, l’Institut Jules Bordet est un hôpital entièrement consacré aux patients…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchSão Paulo, BrazilHQ recorded Nov 6, 20261,001-5,000738 contacts →

Exact match

“Fundada em 1.968, o IBCC Oncologia é conhecida por ser um Centro de Tratamento Oncológico de alta complexidade e possuir um Centro de Pesquisa Clínica com mais de 130 estudos…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchRecife, BrazilHQ recorded Nov 6, 20261,001-5,000736 contacts →

Exact match

“O Hospital de Câncer de Pernambuco iniciou suas atividades em 9 de novembro de 1945 já com o objetivo de ser uma instituição de saúde de direito privado, sem fins lucrativos e de…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLouisville, AZ, United StatesHQ recorded Nov 6, 2026501-1,000714 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 · Nov 6, 2026 · View company records in RevenueBase
20Exact matchBelo Horizonte, BrazilHQ recorded Nov 6, 20261,001-5,000699 contacts →

Exact match

“O Instituto Mário Penna é uma instituição filantrópica de saúde especializada em tratamentos contra o câncer.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLittle Rock, AR, United StatesHQ recorded Nov 6, 2026501-1,000640 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 · Nov 6, 2026 · View company records in RevenueBase
22Exact matchFort Myers, FL, United StatesHQ recorded Nov 6, 20261,001-5,000553 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 · Nov 6, 2026 · View company records in RevenueBase
23Exact matchBangalore, IndiaHQ recorded Nov 6, 2026501-1,000553 contacts →

Exact match

“Welcome to Cytecare Hospitals, the leading patient-centric healthcare provider in Bangalore, India.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchMuriaé, BrazilHQ recorded Nov 6, 20261,001-5,000498 contacts →

Exact match

“Desde 1995, a Fundação Cristiano Varella, criada por Lael Varella em memória de seu filho Cristiano, se destaca como um pilar no combate ao câncer.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchJakarta Barat, IndonesiaHQ recorded Nov 6, 2026501-1,000475 contacts →

Exact match

“Rumah Sakit Kanker "Dharmais"- Pusat Kanker Nasional”

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

Showing 25 of 1,911 oncology medical groups worldwide

See the full list, filter by size, metro and specialty, and access 24,143 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oncology medical groups worldwide at a glance

As of Nov 6, 2026
16.6%Verified-email coverage
76.1Average contacts per company
11-50Median size (employees)
1.4%Largest-city concentration · Sao Paulo
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
559
11-50
588
51-200
355
201-500
174
501-1,000
102
1,001-5,000
77
5,001-10,000
25
10001+
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 oncology medical groups are linked below.
What qualifies
Company records worldwide whose business descriptions match “oncology medical groups” 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 24,143 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.

Oncology medical groups by location

6 lists · largest first

Every Oncology medical groups 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 “oncology medical groups”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oncology medical groups are there worldwide?

RevenueBase identified 1,911 company matches for oncology medical groups 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?

UT MD Anderson tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most oncology medical groups?

The United States leads with 621 companies, followed by Brazil (264) and India (174). Every oncology medical groups list by country and city is linked on this page.

Which city has the most oncology medical groups?

Sao Paulo leads with 27 company records, followed by New York (16) and Ahmedabad (15).

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 24,143 professional contacts with verified work emails tracked across these 1,911 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.