A rich body of knowledge spans organizational topics relevant to the practice, conceptual development and planning of social work health care services. At a time when health care organizations are experiencing major changes in their structure and financing, organizational research informs both the system adjustments and leadership which social work can offer the health care field. Organizational research on health care social work is grouped into three categories: management and administrative issues; interprofessional and interorganizational relations; and service delivery topics. Within each category, the major issues are presented with single site and multi-site research reviews. Recommendations to improve the contributions of this body of research include greater attention to methodologicazl rigor in designing and implementing research projects.