A thorough and definitive tool to calculate health plan market share:
Market researchers can discover which health plans operate in each state, in the commercial, Medicare and Medicaid managed care markets.
Health business strategists can gauge competitors' strengths and identify where opportunities for market expansion lie.
Health plans and their advisers can conduct accurate market research using the most current, most thoroughly vetted and most trusted data available.
Policymakers and industry observers can track enrollment trends and growth by state, by sector or by company.
Pharmacy benefit and pharmaceutical industry executives can identify the PBMs and specialty pharmacy providers contracted with each plan
Market analysts can stay up to date on news and events with immediate or long-range impact on market share, with guidance from AIS researchers on how to calculate market impact of events.
Health care policymakers can track growth in the managed Medicaid, Medicare and individual commercial sectors in the post-ACA market.
Industry analysts can quickly see which plans are the leaders in any state or sector.
All known health insurers are surveyed annually by AIS staff researchers. The survey for the 2017 edition was conducted in February-April 2017. Organizations are contacted individually and offered options to fill out an online or paper survey, or to provide information via email, fax, mail or telephone interviews. Data provided directly by companies via survey is deemed the most accurate and up-to-date information on that company. For companies that do not return a survey, or where blanks are left on responses, researchers endeavor to complete the record through other means.
Survey data are audited against public records as available. For listed entities that prefer for AIS to fill out enrollment information from publicly available data sources, commercial enrollment is from state insurance department filings and/or SEC filings. Medicare enrollment is from Centers for Medicare and Medicaid Services (CMS) records. Medicaid enrollment, when not provided by the company, is collected from state Medicaid agency reports. See specific data sets for source dates.
Data from company websites, SEC filings, company press releases and published news reports were used to supplement the records.