This report examines the nature of the conditions presented by adolescents and the health care provided by office-based physicians. The characteristics of patients are noted and the reason for the visit to the doctor and the length of the visit are summarized. Tables present information on: (1) average annual rate of office visits of adolescents and all other age groups by sex, race, and age; (2) number of office visits made by adolescents and all other age groups and percent distribution by visit characteristics; (3) number of office visits made by adolescents and percent distribution by the 20 most frequent principal reasons for the visit; (4) number of office visits made by adolescents and percent distribution by the 20 most frequent principal diagnoses, according to age; (5) number of drug mentions in office visits made by adolescents and all other age groups and percent distribution by therapeutic category; (6) number and percent distribution of drug mentions in office visits made by adolescents and percent distribution by age and most frequently named drugs; and (7) number of generic drugs utilized in office visits made by adolescents by age and the 30 most frequently used generic substances. (JD)