Table 1.

Patient, Provider, and Visit Characteristics of National Ambulatory Medical Care Survey Sample (Unweighted n = 2,964, Weighted n = 121,633,833)

FrequencyWeighted FrequencyPercent of Visits (Weighted)
 Non-Hispanic White247891,850,33075.51
 Non-Hispanic Black1647,532,3306.19
 Non-Hispanic other1168,879,1287.30
Type of payment
 Private insurance40417,932,72414.74
 Type of visit
 New problem89334,348,86928.24
 Chronic problem, routine120550,643,00641.64
 Chronic problem, flare-up2058,072,2686.64
 Preventive visit66128,569,69123.49
Primary care provider—yes2668113,553,96793.36
Established patient—yes2820116,606,88395.87
“Does the patient now have: cancer?”
Type of provider seen
 Physician seen2926119,453,94898.21
 Physician assistant seen1143,178,1172.61
 Nurse practitioner/midwife seen833,528,7652.90
Type of doctor seen
 MD—doctor of medicine2599110,605,83590.93
 DO—doctor of osteopathy36511,027,9989.12
Type of practice (solo/nonsolo)
Survey year
MeanStandard Error of Mean
Patient age—years77.950.23
 Total number of chronic conditions
 Total number of services ordered or provided during visit*
 Number of medications coded2.870.06
 Time spent with physician—minutes
  • Abbreviation: CHIP, Children’s Health Insurance Program.

  • * Total number of services reported as ordered or provided during the visit. Includes vital signs and write-in entries.

  • Types of providers seen during visits are not mutually exclusive and do not add up to 100%; multiple provider types could have been included in the visit.