[영문]OBJECTIVE: Few studies have examined access to a regular source of medical care and preventive medical care among adults being treated for substance abuse. This report describes the prevalence of a usual source of care, use of preventive care services, and self-reported chronic conditions among adults in a publicly funded substance abuse treatment program. METHOD:S: The investigators partnered with a large behavioral health organization in Los Angeles County to conduct an interviewer-administered survey during June 2008. RESULTS: A total of 254 clients completed the survey. Fifty percent reported having a usual source of medical care, and 70% reported at least one visit to a physician within the prior 12 months. Participants reported low receipt of most preventive care screening measures. Half had at least one chronic condition, with hypertension, asthma, and arthritis most often reported. CONCLUSION:S: Although this middle-aged sample with substantial medical need reported having access to care, receipt of preventive care was low and unaddressed health concerns were reported.