|Dataset full name:||Hospital Service Area (HSA) and Hospital Referral Regions (HRR)|
|Dataset acronym||HSA & HRR|
|Summary||A hospital service area (HSA) is a collection of ZIP codes whose residents receive most of their institutional care from the hospitals in that area. The HSA were defined by assigning ZIP codes to the hospital area where the greatest proportion of their Medicare residents were hospitalized. Hospital referral regions (HRR) represent regional health care markets for tertiary medical care. HRR were defined by assigning HSA to the region where the greatest proportion of major cardiovascular procedures and neurosurgeries were performed.The following data sources are used for computing HAS/HRR: the Centers for Medicare and Medicaid Services (CMS), U.S. Census Bureau, American Hospital Association, American Medical Association, and the National Center for Health Statistics.|
|Key Terms||Geographical and Regional Variation, Quality of Care, Centers for Medicare and Medicaid Services, Medicare Spending, Racial Disparities|
|Sponsoring Agency/Entity||Dartmouth Institute for Health Policy and Clinical Practice||Health conditions/Disability measures|
|Disability Measures||NA||Measures/outcomes of interest|
|Topics||Geographical and regional variation, Quality of care, Centers for Medicare and Medicaid Services, Medicare spending, Racial disparities||Sample|
|Sample Population||Hospital Service Area (HSA) and Hospital Referral Regions (HRR)|
|Sample Size/Notes||HSA: 3,436 HRR: 306|
|Unit of Observation||Hospital Service Area (HSA) and Hospital Referral Regions (HRR): State and Region|
|Geographic specificity||Zip Code||Data Collection|
|Data Collection Mode||Administrative|
|Data Collection Frequency||Annual||Strengths and limitations|
|Strengths||Data ideal for doing health-policy research, on regional variation, and services utilization. Data can be linked with other CMS/non-CMS datasets.|
|Limitations||Data files have limited or no usability as stand alone files (must be linked with other survey or administrative data).||Data details|
|Data Access Requirements||Data Use agreement, No cost|
|Technical||Bynum JPW, Meara ER, Chang CH, Rhoads JM, Bronner KK. Our Parents, Ourselves: Health Care for an Aging Population. Lebanon, NH: The Dartmouth Institute of Health Policy & Clinical Practice, 2016. http://www.dartmouthatlas.org/downloads/reports/Our_Parents_Ourselves_021716.pdf|
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