The extent to which the U.S. population uses primary care physicians relative to other types of physician specialists has important policy-relevant implications for both the cost and quality of health care. Using the Household Component of the Medical Expenditure Panel Survey (MEPS-HC), this Statistical Brief provides descriptive statistics for the U.S. civilian noninstitutionalized population illustrating variation in average total and out-of-pocket expenses per visit across selected office-based physician specialty types in 2013. Specifically, data are shown for the eight most frequently seen physician specialists in an office-based setting, including: 1) primary care physicians in general practice, family practice, or internal medicine (34.4 percent of visits); 2) pediatrics (8.2 percent); 3) obstetrics/gynecology (6.5 percent); 4) ophthalmology (6.7 percent); 5) orthopedics (5.6 percent); 6) psychiatry (4.7 percent); 7) cardiology (3.8 percent); and 8) dermatology (3.2 percent); as well as a ninth catchall category that includes all other physician specialty types (26.8 percent). When discussing means, only estimates for specialty categories that differ significantly from the national average for all office physician visits at the .05 level are noted.