Company lists · Data refreshed September 2026
Top 25 Medical insurance providers based in the United States
RevenueBase identified 664 medical insurance providers headquartered in the United States as of September 2026 and tracks 117,872 professional contacts across them, including 30,017 with verified work emails. Dallas is the largest hub.
This list covers medical insurance providers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.
The 25 largest medical insurance providers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 18,559 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 2 | 17,458 contacts → | ||||
Indirect evidence “Health Care Service Corporation serves nearly 23 million people across the United States through its portfolio of health benefit solutions.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 3 | 13,144 contacts → | ||||
Indirect evidence “When it comes to your health, everything matters.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 4 | 9,421 contacts → | ||||
Indirect evidence “At Anthem Blue Cross and Blue Shield we understand our health connects us to each other.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 5 | 5,446 contacts → | ||||
Indirect evidence “For more than six decades, BlueCross BlueShield of South Carolina has been part of the national landscape.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 6 | 4,363 contacts → | ||||
Indirect evidence “How can we best serve our members and the community?” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 7 | 3,507 contacts → | ||||
Indirect evidence “Blue Cross Blue Shield of Massachusetts is a community-focused, tax-paying, not-for-profit health plan headquartered in Boston.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 8 | 3,413 contacts → | ||||
Indirect evidence “A national blended health organization, Highmark Health and our leading businesses support millions of customers with products, services and solutions closely aligned to our…” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 9 | 2,667 contacts → | ||||
Strong evidence “Founded in 1934, Medical Mutual is the oldest and one of the largest health insurance companies based in Ohio.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 10 | 2,593 contacts → | ||||
Indirect evidence “EmblemHealth is one of America’s largest not-for-profit health insurers.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1,847 contacts → | ||||
Indirect evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 12 | 1,770 contacts → | ||||
Indirect evidence “At Capital Blue Cross, we promise to go the extra mile for our team and our community.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,463 contacts → | ||||
Indirect evidence “Regence is part of a family of regional health plans that have been a symbol of strength and stability in local communities for more than 100 years.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 14 | 1,311 contacts → | ||||
Partial evidence “The Hawaii Medical Service Association (HMSA), an independent licensee of the Blue Cross and Blue Shield Association, is a reliable name in Hawaii health care.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 15 | 1,292 contacts → | ||||
Indirect evidence “Noridian Healthcare Solutions, LLC (Noridian) develops solutions for federal, state and commercial health care programs through a full suite of innovative offerings, including…” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 16 | 1,192 contacts → | ||||
Indirect evidence “At Meritain Health®, we know every health journey is different.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 17 | 1,094 contacts → | ||||
Partial evidence “Curative is a leading healthcare services company that created and launched the first-of-its-kind employer-based health insurance plan.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 18 | 1,090 contacts → | ||||
Indirect evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 19 | 993 contacts → | ||||
Indirect evidence “HAP is now Health Alliance Plan by Henry Ford Health.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 20 | 974 contacts → | ||||
Indirect evidence “NASCO empowers health plans to innovate, grow, and deliver better experiences through a comprehensive suite of healthcare technology solutions and services.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 21 | 828 contacts → | ||||
Indirect evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 22 | 717 contacts → | ||||
Indirect evidence “Imagine360 is an integrated health plan addressing one of the greatest challenges on behalf of self-funded employers: healthcare costs are harming the bottom line, they're…” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 23 | 652 contacts → | ||||
Indirect evidence “ESIC Corporation is a company based out of 38 S Market St, Frederick, MD, United States.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 24 | 626 contacts → | ||||
Indirect evidence “A family of companies providing a better level of innovative health coverage for people just like you.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
| 25 | 617 contacts → | ||||
Indirect evidence “Optima Health is now Sentara Health Plans.” Source: RevenueBase Database · checked Sep 17, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: medical insurance providers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names medical insurance providers.
- Partial evidence
- Its own public description names part of medical insurance providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name medical insurance providers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 664 medical insurance providers based in the United States
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Medical insurance providers based in the United States at a glance
As of Sep 17, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 664 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among medical insurance providers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “medical insurance providers”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names medical insurance providers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among medical insurance providers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 30,017 across the full list. 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 17, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names medical insurance providers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many medical insurance providers are there based in the United States?
RevenueBase identified 664 medical insurance providers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Anthem, INC, headquartered in Indianapolis, tops this list with the largest team on record.
Which city has the most medical insurance providers?
Dallas leads with 15 headquartered companies, followed by Tampa (13) and Atlanta (11).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 30,017 verified decision-maker contacts tracked across these 664 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 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 Smart Search, 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.
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