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Gettysburg, Pa. (February 3, 2019) – The new OPEN MINDS analysis of the Medicaid managed care market found that Centene is the insurer with the most Medicaid beneficiaries. This new analysis was released in the report, The 2019 OPEN MINDS Medicaid Managed Care Market Share Report. The analysis also found that the five largest insurers have 25.8 million Medicaid beneficiaries, representing 47% of the population enrolled in Medicaid managed care and 35% of the total Medicaid population.

The analysis identifies all insurers with more than 500,000 Medicaid members and their relative market share. Compared to 2017, the top five insurers remain the same, although the rankings have shifted slightly. Centene—the largest insurer in both years—had the largest increase in enrollment due to the acquisition of Fidelis Care, which had 1.2 million members in 2017. Overall, the market share of the largest plans increased by 4.2%.

“Our report shows that the top-five Medicaid insurers are increasing their market share and are likely to continue to increase that market share. And on top of that, we are seeing non-traditional mergers and acquisitions, which are likely to have a profound effect on how health care is delivered,” said OPEN MINDS Chief Executive Officer Monica E. Oss. “Understanding the Medicaid market and its dominant contractors is crucial to provider organizations who are either looking to expand their geographic service or are looking for increased managed care contracting opportunities.”

This new market intelligence report addresses a number of topics related to understanding the Medicaid market, including:

  • An overview of the Medicaid landscape, including total Medicaid enrollment over time and managed care enrollment over time
  • The insurers with over 500,000 Medicaid members, and their geographic operating areas
  • Trends among the ten largest Medicaid health insurers in 2017 and 2018
  • A listing of acquisitions, re-procurements, and contracting changes that will affect insurer enrollment

A free summary analysis of the report can be found at: Watch Out For Elephants. The report, The 2019 OPEN MINDS Medicaid Managed Care Market Share Report, is available at no charge to Premium and Elite members of The OPEN MINDS Circle and can be purchased in the OPEN MINDS shop for $495.

For additional questions and inquiries, please contact Sarah C. Threnhauser, Executive Vice President, OPEN MINDS at 717-334-1329 or


OPEN MINDS is a national market intelligence and strategic advisory firm focused on the sectors of the health and human service field serving consumers with chronic conditions and complex support needs. Founded in 1987 and based in Gettysburg, Pennsylvania, the 175+ associates provide market insights and innovative management solutions designed to improve operational and strategic performance. Learn more at

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