This paper examines the determinants of whether an individual received continuing treatment/rehabilitation services 30 days after receiving inpatient substance abuse detoxification. Data came from 1997-1999 employer health insurance claims. Only 49.4% of detoxification episodes were followed by continuing mental health or substance abuse treatment within 30 days after discharge. Some of the factors positively associated with receiving continuing treatment after receiving detoxification included: female gender, being in a behavioral health carve-out plan, and lower cost-sharing requirements for an outpatient substance abuse visit.