The diverse alcohol and drug abuse rehab services which are available to alcohol and drug addicted persons in Simi Valley, California can vary in several different ways. Quite a few drug and alcohol abuse rehabilitation services are offered in a residential or inpatient setting, where clientele reside for the duration of their rehab which provides a more conducive rehabilitation setting. Others offer drug and alcohol abuse treatment services on an outpatient basis which provides a sense of versatility, although outpatient programs may not be a suitable substance abuse rehabilitation program for individuals in Simi Valley who are struggling with serious drug addiction problems. Regardless of whether inpatient or outpatient substance abuse rehab services are selected, there are varying amounts of time that people will be required to continue to be in the drug and alcohol treatment program. For example, quite a few short-term programs offer services for 30 days or less, whereas long-term facilities will require at least a 12 week stay.