AIS Health Names Top 10 Fastest-Growing Health Plans; Attributes Their Growth to Diversified Product Lines

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According to AIS’s Directory of Health Plans, Cambia Health Solutions was the fastest growing health plan in the U.S. from 2016 to 2017, with a 52% increase in membership..

According to data from AIS’s Directory of Health Plans, 61% of U.S. health insurers that were active in both 2016 and 2017 experienced a net increase in membership over the year. Via a combination of acquisitions and organic growth strategies, some mid-sized plans are growing more quickly than their larger rivals, as measured by a percentage of covered lives.

The top 10 plans with a million or more members that saw the highest percentage of growth over one year are:

1.    Cambia Health Solutions
2.    Blue Cross and Blue Shield of Florida
3.    WellCare Health Plans
4.    Molina Healthcare
5.    Inland Empire Health Plan
6.    Centene Corporation
7.    Kaiser Permanente
8.    UPMC Health Plan
9.    Tufts Associated Health Plans
10.    CareSource

AIS Health’s Director of Data Solutions Susan Namovicz-Peat was “surprised” by the number of mid-sized companies topping the list. “Traditionally we see enrollment gains from the big players in the industry, but as a percentage of a plan’s overall membership, we saw that some of the mid-sized players have made large gains, as they have become more aggressive with acquisitions and have diversified,” she said.

Many mid-sized insurers’ enrollment figures in the individual market benefitted from reduced competition as multiple major insurers, most notably Aetna and UnitedHealthcare, reduced their public exchange presence or dropped out altogether. Some mid-sized companies opted to increase their public-sector presence, either via expanding into new states or counties, or by acquisitions.

More information about these companies’ enrollment growth are detailed in a new report from the AIS Health data team, “Top 10 Fastest-Growing Health Plans Thrive by Diversifying Product Lines.” Access the free report in the “In-App Downloads” section of the demo of AIS’s Directory of Health Plans — Online Version at

Each year, AIS Health’s in-house research team collects the latest enrollment figures, by sector and by state, for all U.S. health plans, to create AIS’s Directory of Health Plans, the industry's most trusted resource for health plan market analysis. Through personal interviews or surveys with a knowledgeable person at all known health insurers in the country — including subsidiaries and parent companies — the researchers get a clear picture of product offerings, contracts and markets, ensuring that each covered life is counted only once, and is categorized by plan models that are defined in a consistent and meaningful manner which reflect the current industry. By maintaining impeccable research standards and strict methodology through 14 annual editions, the Directory offers extremely accurate and sensitive insight into developing trends.

The all-new 2017 edition of AIS’s Directory of Health Plans has just been released, and is available in various formats — an interactive website, data files on a USB flash drive or a printed book. For more information and to order the Directory, visit For more information on the online version, including an interactive demo of the features of the website, visit

About AIS Health
AIS Health is a publishing and information company that has served the health care industry for more than 30 years. AIS Health’s mission is to provide objective and relevant business and strategic information for health care executives, by developing highly targeted news, data and analysis for managers at health insurance companies, pharmaceutical organizations, providers, purchasers and other health care industry stakeholders. AIS Health, which maintains journalistic independence from its parent company, MMIT, is committed to integrity in reporting and bringing transparency to health industry data. Learn more at and

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Susan Namovicz-Peat, Director, Data Solutions
AIS Health
+1 202-688-0070
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