The diverse alcohol and drug abuse rehab programs which are offered to drug and alcohol addicted individuals in Erving, Massachusetts can differ in a lot of different ways. Quite a few drug and alcohol abuse rehab services are offered in a residential or inpatient location, where clients reside for the duration of their treatment which supplies a more conducive rehab setting. Others offer substance abuse treatment programs on an outpatient basis which provides a sense of flexibility, though outpatient facilities are not always an appropriate alcohol and drug abuse rehabilitation service for individuals in Erving, Massachusetts who are having difficulties with serious drug or alcohol addiction difficulties. Regardless of whether inpatient or outpatient substance abuse rehabilitation services are chosen, there are also different lengths of time that men and women will be required to stay in the drug rehab facility. For instance, many short-term programs provide services for 4 weeks or less, whereas long-term centers will call for at least a 90 day stay.