ARS Resources - American Society of Anesthesiologists (ASA)



The ASA® 2018 ANESTHESIA ALMANAC is a compilation of perioperative data for the United States. It includes information about surgical volume and anesthesia utilization trends and anesthesia workforce characteristics. Data in the Almanac were compiled from the American Hospital Association (AHA) Annual Survey, the Healthcare Cost and Utilization Project Nationwide Inpatient Sample, CMS National Plan and Provider Enumeration System (NPPES), National Residency Match Program (NRMP), State Ambulatory Surgery and Services Databases and State Inpatient Databases, Medicare Physician Compare Dataset, Physician/Supplier Procedure Summary (PSPS) Files and Provider of Service Files, RAND Corporation, ASA Member Services and the National Anesthesia Clinical Outcomes Registry (NACOR). The ASA Analytics and Research Services Department produces the ANESTHESIA ALMANAC every other year.

Peer-Reviewed Publications:

White Paper:

Anesthesia Workforce Summary Reports by ASA Caucus (2015):

Read the most recent edition of Policy Matters.

ASA Analytics and Research Services (ARS) collects, maintains and analyzes a wide array of health care data; and publishes periodic Policy Briefs, an ASA MONITOR column, and summary studies. The data collected include Medicare claims, hospital data from the American Hospital Association and Medicare Cost Reports, and manpower data from the NPI Registry maintained by the National Plan and Provider Enumeration System.

A summary of current ARS projects can be found here.

Policy Briefs

Six HPR Policy Briefs are currently available, with a seventh to be completed soon. If you have a suggestion regarding future content, please send us a note at or contact the Director.

Evidence-Based Review Did Not Find Nurse Anesthetists' Care Equal to that of Physician Anesthesiologists (July 2014, Vol 2, Issue 4)

Patients Cared for by the Veterans Health Administration Present Unique Challenges to Health Care Providers (April 2014, Vol 2, Issue 3)

Lack of Clinical Direction from Physician Anesthesiologists Associated with Higher Patient Mortality (January 2014, Vol 2, Issue 2)

Critical Access Hospitals May Lack Resources Necessary for High-Quality Care (January 2014, Vol 2, Issue 1)

Validity Issues Harm Study Funded by Nurse Anesthetists (August 2013, Vol 1, Issue 2)

Anesthesiology: A History of Value (August 2013, Vol 1, Issue 1)

Policy Matters

Every other month, The ASA Monitor includes a column from the HPR Department called Policy Matters. Various topics related to health services and health policy research relevant to ASA are covered. Topics to-date have included:

Trends in Ambulatory Surgery Centers: A Result of Myriad Forces (August 2016)

The Use of Income, Education and Race Data in Health Services Research (February 2016)

Trends in Number of Medicare Anesthesia Claims by Facility Setting, 1994-2014 (December 2015) 

The Volume-Outcomes Relationship in Surgery: So Much Research, So Few Answers (October 2015)

Revisiting the 2014 American Medical Association Physician Economic Impact Study (July 2015)

Surgical Procedure Volume in the United States, 2011 and 2013 (April 2015)

Research Potpourri: Lessons From 2014 Session on Investigators in Health Services Research in Anesthesiology (February 2015)

The Importance and Value of Member Participation in Research Surveys (October 2014)

Comparing NACOR and Medicare: The Importance of Co-Validation and Using Multiple Data Sources (August 2014)

Finding Policy Relevance in Lists of "Best" Hospitals (June 2014)

10-Year Trends in Supply of Anesthesiologists (April 2014)

Hospitalists in Community Hospitals (February 2014)

VA Medical Centers: Research in Waiting (December 2013)

Applying Research to Practice: The Promise and Challenge of CER (October 2013)

People Matters: Challenges in Workforce Analysis to Inform Health Policy (August 2013)

Take Steps Now to Enhance Research on Future Value-Based Initiatives (June 2013)

The Call for Health Services and Health Policy Research (April 2013)

If you have suggestions for future column topics, please let us know at

Other Documents

Several analyses and reports are for ASA internal purposes and to support a specific ASA committee. However, many studies and publications will be made available to all ASA members. Selected ARS publications are listed below.

Useful Links

Below are some of ARS’s favorite website links for health care information. There are many other resources that ARS recommends relating to more technical aspects of health services and health policy research (e.g., econometrics, SAS® and Stata® programming). If you have any questions regarding health care information or research-related resources, or have a favorite link related to health services and health policy research, let us know at

Agency for Healthcare Research and Quality (AHRQ)

Information on health care costs and utilization and medical expenditures through two databases:

» HCUPnet

» The Medical Expenditure Panel Survey (MEPS)

AHRQ also provides resources on clinical effectiveness and clinical practice guidelines here.

American Hospital Directory (AHD)

Hospital utilization and financial information based on Medicare Cost Report data.

American Hospital Association (AHA)

Free hospital information including bed size, admissions, births, and OP visits are available through its “free hospital lookup” feature. Click Here.

Anesthesia Quality Institute (AQI)

The AQI is the home of the National Anesthesia Clinical Outcomes Registry (NACOR). The vision of the AQI is to become the primary source of information for quality improvement in the clinical practice of anesthesiology.

Behavioral Risk Factor Surveillance System (BRFSS), of the Centers for Disease Control

Prevalence and Trend data are available through a tool at this here.

Detailed statistics are available using following here.

Bureau of Labor Statistics (BLS)

Federal agency responsible for measuring labor market activity, working conditions, and price changes in the economy.

Centers for Medicare and Medicaid Services (CMS)

Provides statistical information for Medicare and Medicaid beneficiaries. Detailed information by beneficiary type and state is available through the Medicare and Medicaid Statistical Supplement.

Census Bureau

The U.S. Census Bureau’s mission is to serve as the leading source of quality data about the nation's people and economy

Center for Studying Health System Change

Nonpartisan center that conducts health policy research and analysis focused on the U.S. health care system.

Comparative Effectiveness Overview from the NIH

An overview of and resources related to Comparative Effectiveness Research

The Dartmouth Atlas

The Dartmouth Atlas Project has documented variations in how medical resources are distributed and used in the United States.

Foundation for Anesthesia Education and Research (FAER)

FAER is an ASA related organization whose mission is to advance medicine through education and research in anesthesiology.


HCUPnet is a free, on-line query system based on data from the Healthcare Cost and Utilization Project (HCUP). It provides access to health statistics and information on hospital inpatient and emergency department utilization.


Quality of care and patient satisfaction at over 4,000 Medicare-certified hospitals across the country. Similar data is available for physicians.

National Cancer Institute (NCI)

State statistics on cancer incidence rates and mortality are available at this here.

National Center for Health Statistics (NCHS), of the Centers for Disease Control

Births and deaths by state are released through the National Vital Statistics System (NVSS)

Data on utilization of health resources are released through the National Health Care Surveys (NHCS)

National Institutes of Health (NIH)

The NIH, a part of the U.S. Department of Health and Human Services, is the nation’s medical research agency—making important discoveries that improve health and save lives.

PCORI- Patient Centered Outcomes Research Institute

PCORI is authorized by Congress to conduct research to provide information about the best available evidence to help patients and their health care providers make more informed decisions.

RAND Corporation

A nonprofit institution that conducts research and analysis. Documents related to health care can be found here.

State Health Facts

State Health Facts is maintained by the Kaiser Family Foundation and provides free, up-to-date, and easy-to-use health data for all 50 states, the District of Columbia, the United States, counties, territories, and other geographies.

US News & World Report Rankings

Rankings of best hospitals by specialty. Includes basic information for each hospital from AHA annual survey and patient satisfaction data from federal HospitalCompare website.


Thank You Industry Supporters

Whose contributions allow the American Society of Anesthesiologists® to create world-class education and resources to improve patient care and outcomes.

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