A total of 267 patients who were receiving care for psychiatric and substance use disorders at a university medical center completed a self-report instrument assessing their previous receipt of clinical preventive services. High rates of mammography and Pap tests within the past year were observed (76 and 77 percent). Rates of immunization (hepatitis B and tetanus vaccines) varied from 11 percent to 78 percent. Rates of preventive counseling for sexual practices, diet, and avoidance of alcohol were lower than 25 percent in all groups. Only 6 percent of all patients reported having been screened for gun ownership, despite the high risk of suicide among gun owners.