This paper describes a methodology to delineate factors associated with consumer acceptance of the medical nurse practitioner (MNP). The MNP is a category of new health practitioners with proficiency in medical/health care functions traditionally performed only by physicians. A process model approach was developed to study the significance of selected sociodemographic cognitive, attitudinal, and clinical/medical factors that are expected to predispose consumer acceptance of the MNP. The survey population consists of predominantly elderly and indigent ambulatory patients to an inner-city primary care clinic. The data were collected from 156 primary care patients before and after the introduction of the MNP program. The results clearly demonstrate consumer support for the new health practitioner concept. This finding is further substantiated in the "after" study. From an analysis of symptoms experience, symptom severity, and type of symptoms, symptoms experience emerged as the strongest indicator of consumer receptivity to MNP concept. Additionally, exposure to MNP caused the consumer to become more aware of proper consumption and increased the demand for physician care and specialty care where appropriate.