If an addict requires treatment for drug addiction and is one of the fortunate clients to have health insurance, many drug rehabilitation facilities in Sunnyvale, California will accept any type of health insurance and will liaise with potential clients to determine which types of treatment are covered. The majority of private health insurance companies cover outpatient and residential drug rehab, although the time in rehab which is covered can vary. Private health insurance will more than likely cover the first 4 weeks of drug and alcohol rehabilitation, although there are clients whose coverage is more substantial and can extend to a longer stay in a drug rehab center. It is asked that potential clients seek advice of their insurance company as soon as possible with the help of their rehab facility to find out what is covered by your private health insurance.