If an individual requires treatment for alcohol and drug addiction and is one of the fortunate clients to be covered under health insurance, many alcohol and drug treatment centers in Greenville, California accept health insurance and will cooperate with people to determine which types of treatment are approved. The majority of private health insurance entities will cover outpatient and residential alcohol and drug rehab, although the time in rehab which is considered covered can vary. Private health insurance will typically cover the first month of drug rehab, although there are persons whose plan is more extensive and can extend to a more long-term residence in a drug and alcohol treatment facility. It is best to consult with their plan directly in liaison with the rehab center to find out what is covered by their private health insurance.