National Ambulatory Medical Care Survey, 1998

Resource Type
Dataset : survey data, and administrative records data
  • United States Department of Health and Human Services. National Center for Health Statistics
Other Title
  • Version 1 (Subtitle)
Collective Title
  • National Ambulatory Medical Care Survey Series
Publication Date
Free Keywords
ambulatory care; doctor visits; health care services; medical care; medical evaluation; medical records; medications; patient care; patients; physicians; prescription drugs; smoking; treatment
  • Abstract

    The National Ambulatory Medical Care Surveys (NAMCS) supply data on ambulatory medical care provided in physicians' offices. The 1998 survey contains information from 24,715 patient visits to 1,247 physicians' offices. Data are available on the patient's smoking habits, reason for the visit, expected source of payment, the physician's diagnosis, and the kinds of diagnostic and therapeutic services rendered. Other variables cover drugs/medications ordered, administered, or provided during office visits, with information on medication code, generic name and code, brand name, entry status, prescription status, federal controlled substance status, composition status, and related ingredient codes. Information is also included on the physician's specialization and geographic location. Demographic information on patients, such as age, sex, race, and ethnicity, was also collected.
  • Table of Contents


    • DS1: Dataset
Temporal Coverage
  • Time period: 1998
  • Collection date: 1998
Geographic Coverage
  • United States
Sampled Universe
Office visits made within the United States by patients of nonfederally-employed physicians who were primarily involved in office-based patient care activities, but not engaged in the specialties of radiology, pathology, or anesthesiology.
The 1998 NAMCS utilized a multistage probability sample design. Primary sampling units (PSUs) were selected in the first stage, physician practices within PSUs in the second stage, and patient visits to selected physicians in the third stage.
Collection Mode
  • (1) Per agreement with NCHS, ICPSR distributes the data file and text of the technical documentation for this collection as prepared by NCHS. (2) The codebook and data collection instrument are provided as a Portable Document Format (PDF) file. The PDF file format was developed by Adobe Systems Incorporated and can be accessed using PDF reader software, such as the Adobe Acrobat Reader. Information on how to obtain a copy of the Acrobat Reader is provided on the ICPSR Website.

This study is freely available to the general public via web download.
Alternative Identifiers
  • 2915 (Type: ICPSR Study Number)
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Update Metadata: 2015-08-05 | Issue Number: 6 | Registration Date: 2015-06-15