Figure 4.

Relationship between information blocking prevalence and competition.

Note: For each HIE, the number of hospital systems/vendors represents the weighted average number of systems/vendors that discharge patients from each zip code covered by the HIE. For each HIE, market share represents the weighted average of hospital discharges across all zip codes served by the HIE that occur at the hospital system/by hospitals using the vendor that serves the largest share of patients for that zip code.