Supplemental data

Healthcare data can be supplemented with additional information on county resources, facility and physician characteristics, health insurance, population estimates, vital statistics, and disease prevalence. These supplemental databases can be linked to healthcare databases, used to calculate population rates, or provide a context for research findings. The Area Resource File, American Hospital Association Annual Survey, Current Population Survey, US Census, and Social Security Death Index are examples of this type of data.

AMA Physician Masterfile

Established by the American Medical Association (AMA) in 1906, the Physician Masterfile was initially developed as a record keeping device supporting membership and mailing activities. Since then, the Masterfile has expanded to include significant education, training and professional certification information on virtually all Doctors of Medicine (MD) and Doctors of Osteopathic Medicine (DO) in the United States, Puerto Rico, Virgin Islands, and certain Pacific Islands. For more information, contact CADR staff

 National Vital Statistics System

National data collection system on vital events including births and deaths.  Data are collected through birth and death certificates and surveys.

National Inventory of Trauma Centers

The Trauma Information Exchange Program maintains an inventory of every hospital designated or certified as a trauma center by a state or local authority and/or verified by the American College of Surgeons.  For more information, contact CADR staff.

Social Security Death Index (SSDI)

Database of death records created from the US Social Security Administration’s Death Master file.  The Death Index contains a listing of persons who had a Social Security number, who are deceased and whose death was reported to the Social Security Administration.  This file is available free online from geneology websites or can be obtained from the National Technical Information Service.

Current Population Survey (CPS)

The CPS is a monthly survey of about 50,000 households conducted by the Bureau of Census for the Bureau of Labor Statistics.  The CPS is the primary source of information on the labor force characteristics of the US population, including income, poverty, and health insurance.

Nielsen Claritas, Inc

The Claritas Pop-Facts database is a set of demographic estimates produced annually.  Demographic estimates at the national, state, county, city/town, census tract, and block group include age, sex, race, Hispanic ethnicity, households, family income and ownership of households.  For more information, contact CADR staff.


The Census, completed every decade, provides population demographic information at the national, state, and county level.  Estimates are provided annually.

Area Resource File (ARF)

ARF is a collection of data from more than 50 primary data sources, including the National Center for Health Statistics (mortality and natality records), the American Hospital Association (facilities statistics), and the American Medical Association (physician specialty data).  Data are available at the county level.  For more information, contact CADR staff.

American Hospital Association (AHA) Annual Survey

The AHA Annual Survey is sent to over 6,300 hospitals in the US and its territories, 98% of which are registered with the AHA.  The survey provides information about hospital organizational structure, personnel, financial performance, services offered, and utilization.  For more information, contact CADR staff.