Highlights of results from the Treatment Episode Data Set (TEDS) include: (1) a total of 1,105,644 records for clients discharged in year 2004 were submitted by 28 States--95 percent of these records (n=1,046,522) could be linked to a TEDS admission record form 2001, 2002, 2003, or 2004; (2) the primary substance reported at admission for 36 percent of all year 2004 linked discharges was alcohol; (3) treatment was completed by 40 percent of the year 2004 discharges; (4) the treatment completion rate for all discharges was highest among discharges from hospital residential treatment (69 percent); (5) among all non-methadone discharges, the median length of stay (LOS) was greatest for discharges from outpatient treatment (69 days); (6) among all methadone discharges, the median LOS was 42 days, and it was longest (115 days) among methadone outpatient discharges; (7) for all service types combined, alcohol as the primary substance remained the client characteristic most strongly associated with treatment completion or transfer to further treatment; (8) for all service types combined, non-Hispanic Whites were 12 percent more likely to complete treatment or transfer to further treatment, down from 18 percent; (9) for all service types combined, males were 5 percent more likely to complete treatment or transfer to further treatment; down 15 percent; and (10) for all service types combined, those who had never been in treatment before were 15 percent more likely to complete treatment or transfer to further treatment, an increase from 9 percent. This report provides information on treatment completion, length of stay in treatment, and demographic and substance abuse characteristics for approximately 1,000,000 discharges from alcohol or drug treatment in facilities that report to individual State administrative data systems. Tables, figures, and appendixes A-C