The National Ambulatory Medical Care Survey (NAMCS)
Database Name: The National Ambulatory Medical Care Survey (NAMCS)
National Center for Health Statistics (NCHS)
Overview of data contents
NAMCS consists of a sample of visits to non-federal employed office-based physicians who are primarily engaged in direct patient care. Excludes anesthesiology, pathology, and radiology. Includes data on patients' symptoms, physicians' diagnoses, and medications ordered, as well as patient demographics, some services and diagnostic procedures provided, limited patient management, and planned future treatment. http://www.cdc.gov/nchs/ahcd/ahcd_questionnaires.htm
Patient ages included
Patients of all ages.
Ambulatory care clinics.
Date range available
The survey was conducted annually from 1973 to 1981, in 1985, and annually since 1989.
Melissa A Pynnonen, Giant Lin, Rodney L Dunn, Brent K Hollenbeck. Use of Advanced Imaging Technology and Endoscopy for Chronic Rhinosinusitis by Physician Specialty. Am J Rhinol Allery. 2012 Nov-Dec;26(6):481-4
Smith WM, Davidson TM, Murphy C. Regional variations in chronic rhinosinusitis, 2003-2006. Otolayrn Head Neck Surg. 2009 Sep;141(3);347-52
Phone: (301) 458-4600
Ease of use
Clean data, good for beginner programmer with knowledge of survey weights.
Downloadable data files are available for SAS, SPSS, and Stata. Survey weights are necessary. Individual patients or providers cannot be followed longitudinally.
Survey design and application of survey weights allows calculation of national estimates.
Limited amount of data that is clinically relevant to otolaryngology.