If someone must receive treatment for drug addiction in Williamstown and is fortunate enough to be covered through health insurance, most drug treatment programs work with those who have health insurance and will cooperate with clients to discover what is and is not approved. The majority of private health insurance entities in Williamstown cover the costs of outpatient and inpatient alcohol and drug rehabilitation, although the timeframe which is covered can vary. Private health insurance most often covers the first 4 weeks of alcohol and drug rehab, although there are people whose coverage is more extensive and can provide for a more long-term stay in a Williamstown alcohol and drug rehabilitation facility. It is best to seek advice of their insurance company directly in liaison with the rehab program to decide what services are covered by their private health insurance.