Notes: We define the number of insurers in a single county as the number of insurers (grouped by parent company or group affiliation) that offer at least one silver plan in the county. For states that do not use healthcare.gov in 2017, insurer participation is estimated based on information gathered from state exchange websites, insurer press releases, and media reports as of August 26, 2016. States that do not use healthcare.gov in 2017 are: California, Colorado, Connecticut, District of Columbia, Idaho, Maryland, Massachusetts, Minnesota, New York, Rhode Island, Vermont, and Washington. See the interactive map here: https://public.tableau.com/profile/kaiser.family.foundation#!/vizhome/InsurerParticipationinthe2017IndividualMarketplace/2017InsurerParticipation
Data Source: Kaiser Family Foundation analysis of data from the 2017 QHP Landscape file released by healthcare.gov on October 24, 2016.
Source: Kaiser Family Foundation: Insurer Participation in the 2017 Individual Marketplace