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Ambulatory Health Care Data

What's New

 

Did You Know?

  • NAMCS data can be used to make physician estimates as well as visit estimates.
  • As part of the survey induction process, physicians are interviewed about themselves and their practices, using the Physician Induction Interview Form. NAMCS public use files from 2005 forward contain a physician-level weight that can be used to make estimates of office-based physicians who saw patients during their reporting week, representing the majority of NAMCS participants. The public use files contain a variety of physician-level variables, and additional items [PDF - 50 KB] are available through the NCHS Research Data Center. The RDC files also contain records for NAMCS physicians who are not included on the public use files for various reasons (did not see patients during reporting week, did not submit visit forms). Including these physicians in one’s analysis along with those who saw patients can provide national estimates of all office-based physicians.
  • A recent example of physician-level NAMCS data appeared in the QuickStats section of CDC’s Morbidity and Mortality Weekly Report (MMWR). It shows acceptance by physicians of various forms of payment from new patients in 1999-00 and 2008-09.
  • A new NAMCS Public Use Physician Trend File covering survey years 2005-2010 is now available; see under Data Products for more information.

 

Data Products

  • We are pleased to announce that data from the 2013 NAMCS Physician Workflow Supplement are now available for use in the NCHS Research Data Center (RDC). This survey began in 2011 as a follow-up data collection initiative sponsored by the Office of the National Coordinator for Health Information Technology to provide a better understanding of physician experiences with adoption and use of electronic health records. Please refer to the 2013 NAMCS Physician Workflow Supplement File Layout [PDF – 204 KB], NAMCS and NHAMCS Restricted Data Available at the NCHS Research Data Center [PDF - 295 KB], visit the RDC website, or contact the Ambulatory and Hospital Care Statistics Branch for more information. (7/2014)
  • Data from the 2010 National Hospital Ambulatory Medical Care Survey, Ambulatory Surgery Component, are now available for use in the NCHS Research Data Center (RDC). Please refer to NAMCS and NHAMCS Restricted Data Available at the NCHS Research Data Center and the RDC data file dictionaries. You can also visit the RDC website, or contact the Ambulatory and Hospital Care Statistics Branch for more information. (7/2014)
  • We are pleased to announce that data from the NAMCS and NHAMCS Cervical Cancer Screening Supplement (2006-2010) are now available for use in the NCHS Research Data Center (RDC). This was a joint effort between NCHS and the National Center for Chronic Disease Prevention and Health Promotion to collect information on screening methods for cervical cancer, including ordering HPV DNA tests and administration of the HPV vaccine. Please refer to the CCSS Provider and Visit File Data Dictionaries and Data Documentation, the RDC website, or contact the Ambulatory and Hospital Care Statistics Branch for more information. (6/2014)
  • Data from the 2013 National Electronic Health Records Survey are now available for use in the NCHS Research Data Center (RDC). Please refer to NAMCS and NHAMCS Restricted Data Available at the NCHS Research Data Center [PDF - 52 KB], see the RDC file layout [PDF - 93 KB], visit the RDC website, or contact the Ambulatory and Hospital Care Statistics Branch for more information. (1/2014)
  • 2011 NHAMCS data are now available for use in the NCHS Research Data Center (RDC). Please refer to RDC website, or contact the Ambulatory and Hospital Care Statistics Branch for more information. (9/2013)
  • We are pleased to announce that data from the 2012 NAMCS Physician Workflow Supplement are now available for use in the NCHS Research Data Center (RDC). This survey began in 2011 as a follow-up data collection initiative sponsored by the Office of the National Coordinator for Health Information Technology to provide a better understanding of physician experiences with adoption and use of electronic health records. Please refer to the 2012 NAMCS Physician Workflow Supplement File Layout [PDF – 267 KB], NAMCS and NHAMCS Restricted Data Available at the NCHS Research Data Center [PDF - 40 KB], visit the RDC website, or contact the Ambulatory and Hospital Care Statistics Branch for more information. (6/2013)
  • NOTICE: Problems were recently found in the 2006 NAMCS and 2007 and 2008 NHAMCS Stata documentation. Several variables had been incorrectly defined as type 'byte' or 'int' which caused them to be missing when running Stata. The dictionary files and Stata datasets have been corrected. (2/2013)
  • We are pleased to announce the release of Summary web tables from 2010 NAMCS and NHAMCS. The NAMCS Summary Tables present the most current data on patient visits to physician offices; the NHAMCS Summary Tables present the most current data on visits to hospital emergency and outpatient departments. Please refer to NAMCS and NHAMCS Web Tables. (1/2013)
  • Stata documentation for 2007-2009 NAMCS and NHAMCS public use data files is now available. This includes Stata .do and .dct files for creating Stata datasets using public use data files in ASCII format, as well as complete, pre-made Stata datasets in self-extracting, compressed format.  Readme files are also available at the same location and contain more information. (12/2012)
  • Data from the 2012 National Electronic Health Records Survey are now available for use in the NCHS Research Data Center (RDC). Please refer to NAMCS and NHAMCS Restricted Data Available at the NCHS Research Data Center [PDF - 40 KB], see the RDC file layout [PDF - 93 KB], visit the RDC website, or contact the Ambulatory and Hospital Care Statistics Branch for more information. (11/2012)
  • SPSS and Stata documentation for the 2010 NAMCS Public Use Data File is now available (10/2012)
  • 2010 NHAMCS Emergency and Outpatient Department Public Use Micro-Data Files and documentation are now available for downloading. SAS, Stata and SPSS files for reading and formatting the data are also available. (10/2012)
  • Notice: It was recently discovered that Tables II and III in the 2010 NAMCS Public Use File Documentation contained incorrect population estimates for the columns labeled 5-14, 15-24, and 25-34 years, due to a transcription error. The tables have been corrected. (9/2012)
  • 2010 NHAMCS data are now available for use in the NCHS Research Data Center (RDC). Please refer to RDC website, or contact the Ambulatory and Hospital Care Statistics Branch for more information. (8/2012)
  • We are pleased to announce the release of the first NAMCS Public Use Physician Trend File, covering survey years from 2005 through 2010. This file includes all previously released physician data from the 2005 through 2010 NAMCS Public Use Files; no visit data are included.  A single record is included for each physician in every survey year; each record contains information collected during the Physician Induction Interview along with a weighting variable which enables researchers to make national estimates. File documentation is also available for downloading, along with SAS files for reading and formatting the data. SPSS and Stata files will be added at a later date. (8/2012)
  • Please read this important information about Expected Sources of Payment Data in NAMCS and NHAMCS [ PDF - 44 KB]

 

Announcements

NAMCS Continuing Medical Education Course

The NAMCS Continuing Medical Education course is now available! The course entitled, “National Ambulatory Medical Care Survey Methods: What Clinicians Need to Know”, has been approved to offer 1.0 continuing medical education (CME) credit, 1.0 continuing nursing education (CNE) credit, and 0.1 continuing education (CEU) credit for physicians, nurses, and other health professionals who register for and complete the online module.

Ambulatory Care Drug Database

It was recently discovered that a March 2012 CDC system update may have caused an error in the Ambulatory Care Drug Database.  As a result, some drugs were displaying in search results without a corresponding number of “2009 Mentions”.  The problem appears to have been identified and resolved.  We will continue to monitor the database periodically to check for any further anomalies.  Please keep in mind that the main function of the database is to help researchers identify codes and characteristics of drugs that have been reported in NAMCS and NHAMCS in order to facilitate research efforts. (4/2012)

 

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  • Ambulatory and Hospital Care Statistics Branch
    National Center for Health Statistics
    3311 Toledo Road
    Hyattsville, MD 20782
  • (301) 458-4600
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