About the map
The below site-of-care shift map displays the distribution of 2021 imaging volumes across various sites of care, by market (Health Referral Region). The sites of care represented include hospital sites (both outpatient (HOPDs) and inpatient) and non-hospital sites (freestanding imaging centers, physician offices, and other sites1). The data in this map originates from Optum’s de-identified Clinformatics® Data Mart which is derived from a database of administrative health claims for members of large commercial and Medicare Advantage health plans.