The different substance abuse rehabilitation services which are accessible to drug and alcohol addicted persons in Washington can vary in a lot of different ways. Quite a few alcohol and drug abuse rehab programs are offered in a residential or inpatient facility, where clients reside the entire time they are in rehab which provides a more therapeutic rehabilitation environment. Others offer substance abuse rehabilitation programs on an outpatient basis which allows for more flexibility, although outpatient facilities may not be a suitable substance abuse rehab service for men and women in Washington who are struggling with serious addiction problems. Regardless of whether inpatient or outpatient substance abuse treatment programs are selected, there are varying lengths of time that people will be required to remain in the drug and alcohol rehabilitation facility. For instance, many short-term programs offer programs for 4 weeks or less, while long-term programs will demand at least a 90 day stay.