There are many different types of alcohol and drug abuse rehab centers in Ayer, Massachusetts which alcohol and drug addicted people can be helped from. For example, there are substance abuse rehab centers which may are geared towards a treatment client with a very brief case of substance abuse and would potentially benefit from a short term drug rehabilitation center which will require the treatment client to stay in rehab for a month or less. For others there are far more intensive and long term substance abuse treatment programs which involve a stay of 90 days or even longer in some cases, depending on the individual's background of drug and alcohol abuse and other variables which may include co-occurring psychological problems. Drug and alcohol abuse rehabilitation programs in Ayer, Massachusetts can be performed as an outpatient or as an inpatient, with inpatient substance abuse rehab programs offering significantly better outcomes as a result of a higher quality of rehab program.