1973 to 1981, 1985, 1989 to present
Annual, except for 1982 to 1984 and 1986 to 1988
Mode of Collection
Multi-stage probability sample survey: in-person computer-assisted personal interviews (CAPI) with participating physicians; physicians complete forms for a sample of office visits during an assigned reporting period.
The National Ambulatory Medical Care Survey (NAMCS) provides national data about the provision and use of medical care services in the United States using information collected from medical records. All 50 states and the District of Columbia have been included in the survey since 1989.
Patient encounters in the offices of non-federally employed, office-based, patient care physicians, including physicians in prepaid practices (e.g., Health Maintenance Organizations) are included. Excluded are telephone contacts and nonoffice visits; visits to hospital-based physicians, specialists in anesthesiology, pathology, and radiology, and physicians primarily engaged in teaching, research, or administration.