In this week’s In Focus section, Health Management Associates Information Services (HMAIS) draws on its database of monthly enrollment in Medicaid managed care programs to provide the latest quarterly analysis of Medicaid managed care enrollment, offering a snapshot of developments across 28 states. [1] The data and insights are particularly timely as stakeholders, including states, Medicaid managed care organizations (MCOs), hospitals and health systems, and providers, continue to plan for multiple possible federal policy changes and the operational realities that will follow.
HMAIS also compiles a more detailed quarterly Medicaid managed care enrollment report representing nearly 300 health plans in 41 states. The report provides by plan enrollment plus corporate ownership, program inclusion, and for-profit versus not-for-profit status, with breakout tabs for publicly traded plans. Table 1 shows a sampling of plans and their national market share of Medicaid managed care beneficiaries based on a total of 66 million enrollees. These data should be viewed as a broader representation of enrollment trends rather than as a comprehensive comparison.
Key Insights from Q1 2025 Data
The 28 states included in our review have released monthly Medicaid managed care enrollment data via a public website or in response to a public records request from Health Management Associates (HMA). This report reflects the most recent data posted or obtained. HMA has made the following observations related to the enrollment data:
- Year-over-year growth. As of March 2025, across the 28 states reviewed, Medicaid managed care enrollment declined by 2.5 million members year-over-year, a 3.9 percent drop as of March 2025 (see Figure 1). This marks a continuation of the downward trend reported in late 2024, though with notable variation across states.
Figure 1. Year-over-Year Growth in Medicaid Managed Care States, 2020−24, March 2025
- Localized growth amid broader declines. While most states experienced enrollment reductions, Indiana and North Carolina bucked the trend with measurable gains, suggesting the influence of state-specific policy shifts or demographic factors. Oregon and Texas also saw modest growth.
- Sharpest contractions. Illinois, Maryland, and South Carolina, reported double-digit percentage drops, underscoring the uneven impact of redeterminations and eligibility changes.
- Difference among expansion and non-expansion states. Among the 21 states included in our analysis that expanded Medicaid, enrollment fell by 1.8 million (-3.6%) to 48.6 million. In contrast, the seven non-expansion states saw a steeper proportional decline (-5.4%), to a total of 12.2 million enrollees.
Table 1. Monthly MCO Enrollment by State, January 2025 through March 2025
It is important to note the limitations of the data presented. First, states report the data at the varying times during the month. Some of these figures reflect beginning of the month totals, whereas others reflect an end of the month snapshot. Second, in some instances, the data are comprehensive in that they cover all state-sponsored health programs that offer managed care options; in other cases, the data reflect only a subset of the broader managed Medicaid population. This limitation complicates comparison of the data described above with figures reported by publicly traded Medicaid MCOs. Hence, the data in Table 1 should be viewed as a sampling of enrollment trends across these states rather than a comprehensive comparison, which cannot be established solely based on publicly available monthly enrollment data.
Market Share and Plan Dynamics
Using our data repository from 300 health plans across 41 states, HMAIS’s report addresses corporate ownership, program participation, and tax status. As of March 2025, Centene continues to lead with 17.7 percent of the national Medicaid managed care market, followed by Elevance (10.8%), United (8.8%), and Molina (6.3%), as Table 2 shows.
Table 2. National Medicaid Managed Care Market Share by Number of Beneficiaries for a Sample of Publicly Traded Plans, March 2025
What to Watch
The policy backdrop remains fluid. The US House of Representatives’ passage of the One Big Beautiful Bill Act introduces sweeping changes to Medicaid financing, including proposed cuts of up to $715 billion. Additional federal proposals, such as mandatory work requirements, could further reshape enrollment patterns.
Stakeholders should prepare for:
- Implementation of work/community engagement mandates for certain adult populations
- Potential redesign of Affordable Care Act expansion programs
- Retraction of federal regulations focused on streamlining of eligibility and redetermination processes to improve accuracy and efficiency
Connect with Us
HMA is home to experts who know the Medicaid managed care landscape at the federal and state levels. As the Medicaid landscape continues to evolve, HMAIS equips stakeholders with timely, actionable intelligence. Our subscription service includes enrollment data, financials, waiver tracking, and a robust library of public documents.
For more information about the HMAIS subscription, contact our experts below.
[1] Arizona, California, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Mississippi, Missouri, Nevada, New Jersey, New Mexico, New York, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, Washington, West Virginia, Wisconsin.
