We examine consumers’ early stage trust beliefs for effects on perceptions of information and system quality, later stage trust, satisfaction and usage intentions in the context of online health services. Using a longitudinal research design, data was collected from a sample of undergraduates during two time periods, approximately five weeks apart. Results show that trust in the website influences trust in the e-service provider at both early and later stages. Perceptions of system and information quality depend on trust, while trust and satisfaction are important to continued usage intentions. Results are important for understanding how trust interacts with IS success factors.