Patient education is widely regarded as an essential component of chronic disease care and effective health promotion. Internet is extremely useful medium in this respect. Web-based information is seldom the subject of systematic investigation for its accuracy and appropriateness for patients. Objective of this study was to evaluate of web-based diabetes patient education material for well-accepted evaluation criteria and core education concepts. Out of 214 web-sites retrieved from meta search engine, 53 sites themselves provide patient information and so considered for evaluation. Data obtained was analyzed by cluster analysis and classified into four categories with respect to quality. Considerable variability in quality of diabetes patient education web-sites was found with respect to core educational concepts and HSWG criteria. Inclusion of evidence-based medicine concepts, role of family support, enhancement in customized content and easier feedback mechanism in the web-sites can be a significant development in the direction of patient-centered diabetes care. (C) 2004 Elsevier Ireland Ltd. All rights reserved.