By use of an interview questionnaire survey done in the home, the Comprehensive Children and Youth Program, I SPY, at the Beth Israel Medical Center, was able to find out something about patient identification with the program, medical care patterns utilized by the interviewed population, and health perceptions within this surveyed group. Some of the findings were as follows: 70 per cent of those interviewed identified the I SPY program as the source of medical care. Better than 90 per cent of those who identified with the I SPY program knew the doctor by name. Sixty-five per cent of those interviewed identified I SPY as the only source of health care. The remaining one third used other sources, including private physicians, other clinics, and neighborhood centers. Sixty-eight per cent of the sample used Beth Israel Hospital emergency room for medical care when the I SPY program was closed. Sixty-four per cent of those interviewed went to the doctor for regular visits. Eighty per cent of those interviewed knew their child's immunization status. The majority used and expressed a preference for the appointment system. However, the need to accommodate the unplanned for sudden illness was evident.