Company lists · Data refreshed September 2026

Top 25 Health maintenance organizations worldwide

RevenueBase identified 424 company matches for health maintenance organizations worldwide as of September 2026 and tracks 189,698 professional contacts across them, including 26,737 with verified work emails. The United States is the largest market and Lagos the largest hub.

This list covers company matches for health maintenance organizations 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 September 20, 2026. Country and city lists for health maintenance organizations 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 Sep 20, 2026 How this list was built
424Companies
189,698Contacts tracked
26,737Verified emails
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The 25 largest health maintenance organizations worldwide

Ranked by team size
Top 25 of 424 company matches for health maintenance organizations worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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 matchOakland, CA, United StatesHQ recorded Sep 20, 202610001+116,185 contacts →

Exact match

“At the heart of health care, you’ll find Kaiser Permanente.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2Exact matchIndianapolis, IN, United StatesHQ recorded Sep 20, 202610001+9,421 contacts →

Exact match

“At Anthem Blue Cross and Blue Shield we understand our health connects us to each other.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3Exact matchBloomington, MN, United StatesHQ recorded Sep 20, 202610001+6,161 contacts →

Exact match

“HealthPartners, an integrated health care organization providing health care services and health plan financing and administration, was founded in 1957 as a cooperative.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchPittsburgh, PA, United StatesHQ recorded Sep 20, 20261,001-5,0004,363 contacts →

Exact match

“How can we best serve our members and the community?”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact matchSantiago, ChileHQ recorded Sep 20, 20261,001-5,0002,910 contacts →

Exact match

“En Consalud nos preocupamos por resolver de la mejor manera las necesidades de salud de nuestros beneficiarios, mediante servicios de calidad que entreguen soluciones de manera…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchDoha, QatarHQ recorded Sep 20, 20265,001-10,0002,362 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchUnited StatesHQ recorded Sep 20, 20261,001-5,0002,328 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact matchMakati City, PhilippinesHQ recorded Sep 20, 2026501-1,0002,218 contacts →

Exact match

“MAXICARE HEALTHCARE CORPORATION Live your best life through superior healthcare and excellent customer service Established in 1987 by an esteemed group of doctors and businessmen…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchBuffalo, NY, United StatesHQ recorded Sep 20, 20261,001-5,0001,847 contacts →

Exact match

“As one of Western New York's first HMOs, Independent Health covers approximately people here and across the country with more than 100 plans, services and products.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact matchRancho Cucamonga, CA, United StatesHQ recorded Sep 20, 20261,001-5,0001,833 contacts →

Exact match

“With a mission to heal and inspire the human spirit, Inland Empire Health Plan (IEHP) is one of the top 10 largest Medicaid health plans, the largest not-for-profit…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchHarrisburg, PA, United StatesHQ recorded Sep 20, 20261,001-5,0001,770 contacts →

Exact match

“At Capital Blue Cross, we promise to go the extra mile for our team and our community.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchBrazilHQ recorded Sep 20, 20261,001-5,0001,294 contacts →

Exact match

“Sempre firme no seu objetivo de promover saúde a toda e qualquer pessoa, baseado em um trabalho pautado pelo profissionalismo e excelência em atendimento, o Grupo Santa Casa…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact matchTel Aviv, IsraelHQ recorded Sep 20, 20265,001-10,0001,258 contacts →

Exact match

“מאוחדת הקופה השלישית בגודלה מספקת שירותי בריאות למעל 1.4 מליון לקוחות בכל הארץ.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchSantiago, ChileHQ recorded Sep 20, 20261,001-5,0001,231 contacts →

Exact match

“Bienvenidos a Isapre Nueva Masvida!”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchLatham, NY, United StatesHQ recorded Sep 20, 20261,001-5,0001,090 contacts →

Exact match

“Founded in 1984 as a physician-founded and guided health plan, CDPHP and its affiliates currently serve members in 29 counties throughout New York with a full family of products.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchMakati, PhilippinesHQ recorded Sep 20, 20261,001-5,0001,052 contacts →

Exact match

“We are the country’s PREEMINENT HMO, committed to lead, innovate, and trailblaze a holistic approach to healthcare management.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact matchDetroit, MI, United StatesHQ recorded Sep 20, 2026501-1,000993 contacts →

Exact match

“HAP is now Health Alliance Plan by Henry Ford Health.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchMakati City, PhilippinesHQ recorded Sep 20, 2026501-1,000942 contacts →

Exact match

“MediCard is a Health Maintenance Organization that provides a comprehensive health care program for its members.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchDetroit, MI, United StatesHQ recorded Sep 20, 20261,001-5,000911 contacts →

Exact match

“Meridian in Michigan’s (Meridian) mission is to continuously improve the quality of care in a low-resource environment.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20Exact matchLos Angeles, CA, United StatesHQ recorded Sep 20, 20261,001-5,000840 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 · Sep 20, 2026 · View company records in RevenueBase
21Exact matchCanton, MA, United StatesHQ recorded Sep 20, 20261,001-5,000828 contacts →

Exact match

“Harvard Pilgrim and its family of companies provide health benefit plans, programs and services to more than 3 million customers in New England and beyond.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22Exact matchGuarulhos, BrazilHQ recorded Sep 20, 20261,001-5,000722 contacts →

Exact match

“Fundada em 19 de janeiro de 1994, a Unimed Guarulhos atua em Guarulhos, Arujá, Itaquaquecetuba, Ferraz de Vasconcelos e Santa Isabel e conta com rede de médicos, hospitais, pronto…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23Exact matchSunchales, ArgentinaHQ recorded Sep 20, 2026n/a674 contacts →

Exact match

“Somos la empresa de medicina prepaga del Grupo Sancor Seguros, líder en la República Argentina con casi 70 años de trayectoria y creciente expansión nacional e internacional.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24Exact matchCaruaru, BrazilHQ recorded Sep 20, 20261,001-5,000631 contacts →

Exact match

“Somos a confiança que a sua vida precisa.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25Exact matchHouston, TX, United StatesHQ recorded Sep 20, 2026501-1,000610 contacts →

Exact match

“We are a local, non-profit, Managed Care Organization (MCO), offering Children's Medicaid (STAR) and CHIP programs.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 25 of 424 health maintenance organizations worldwide

See the full list, filter by size, metro and specialty, and access 26,737 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Health maintenance organizations worldwide at a glance

As of Sep 20, 2026
14.1%Verified-email coverage
447.4Average contacts per company
51-200Median size (employees)
2.1%Largest-city concentration · Lagos
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
72
11-50
107
51-200
97
201-500
59
501-1,000
35
1,001-5,000
35
5,001-10,000
6
10001+
11

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 health maintenance organizations are linked below.
What qualifies
Company records worldwide whose business descriptions match “health maintenance organizations” 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 26,737 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 September 20, 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.

Health maintenance organizations by location

4 lists · largest first

Every Health maintenance organizations 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 “health maintenance organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many health maintenance organizations are there worldwide?

RevenueBase identified 424 company matches for health maintenance organizations worldwide as of September 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?

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

Which country has the most health maintenance organizations?

The United States leads with 163 companies, followed by Brazil (77) and Nigeria (41). Every health maintenance organizations list by country and city is linked on this page.

Which city has the most health maintenance organizations?

Lagos leads with 9 company records, followed by Lagos State (6) and Miami (6).

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 26,737 professional contacts with verified work emails tracked across these 424 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 September 20, 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.