The goal of this article is to examine whether profit status affects the provision of seven "core" drug treatment services and nine "auxiliary" treatment services. Data on the type of services provided by 8,606 treatment providers obtained from the National Survey of Substance Abuse Treatment Services (N-SSATS) collected by the Substance Abuse and Mental Health Services Administration (SAMHSA) in 2000 were used for this study. The types of services offered by the providers were modeled to be a function of the drug treatment providers' (DTP) profit status, DTP organizational and financial characteristics, staff's characteristics, clients' characteristics, and regional variables. A total of 16 logistic regressions were estimated. For-profit DTPs were found to be more likely to offer only two core services and were less likely to offer eight auxiliary services. However, after correcting for sample selection bias many differences in the supply of services between for-profit and nonprofit providers disappeared.