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    Original site: www.cdc.gov/nchs/nhamcs/research-tools/index.html | RestoredCDC.org is an independent project, not affiliated with CDC or any federal entity. Visit CDC.gov for free official information. Due to archival on January 6, 2025, recent outbreak data is unavailable. Videos are not restored. Access data.restoredcdc.org for restored data. Use of this site implies acceptance of this disclaimer.
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August 14, 2024
  NHAMCS Research Tools
          At a glance
            * Find resources to help researchers analyze recent data from the National Hospital Ambulatory Medical Care Survey (NHAMCS).
            * Access additional tools to support analysis of older NHAMCS data in the CDC Archive.
        Drug Database
        The Ambulatory Care Drug Database is a query system researchers can use to search for drugs mentioned in National Hospital Ambulatory Medical Care Survey (NHAMCS) data.
        Users can search by a drug's—
          * Name
          * Generic name
          * Ingredients
          * Characteristics
        Available drug characteristics include—
          * Therapeutic class
          * Composition status
          * Prescription status
          * Control status
        Researchers can also use the database to identify drug codes that can help with the analysis of NHAMCS drug data. The database includes estimates and rates for drugs that were reported at emergency department visits in the 2022 NHAMCS.
        Consumer information about specific drugs is available from the American Society of Health-System Pharmacists' searchable drug database. That system provides information about specific drugs, including their prescription uses, their side effects, and special precautions that must be taken when using them.
        Diagnosis Master Category List
        The Diagnosis Master Category List (DMCL) is used to classify diagnosis codes into clinically meaningful categories. The codes can be used to analyze data across inpatient and ambulatory settings. The DMCL classification scheme is based on the International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM). NHAMCS summary web tables have used the DMCL classification since 2016 NHAMCS.
        The Diagnosis Master Category List (DMCL) is used to classify diagnosis codes into clinically meaningful categories. The codes can be used to analyze data across inpatient and ambulatory settings. The DMCL classification scheme is based on the International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM).
        Resources
        Tools and information linked in this section can assist with analyzing older NHAMCS datasets. These resources are available from the CDC Archive.
          * Analytical notes about expected sources of payment
          * Reliability of NAMCS and NHAMCS Estimates
          * SAS Code to Produce Aggregated Visit Statistics at the Physician or Facility Level
          * Template for producing methods section for journal articles using 1992–2016
          * Trend Analysis Using NAMCS and NHAMCS Drug Data
          NCHS Reliability Standards for Estimates‎
          NCHS Reliability Standards for Estimates
              Data Presentation Standards for Rates and Counts
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