If an individual requires help for alcohol and drug addiction in Castro Valley, California and is lucky enough to be covered through health insurance, a great number of drug and alcohol rehab facilities accept health insurance and will cooperate with clients to determine what treatment services are covered. Most private health insurance companies in Castro Valley cover the costs of outpatient and inpatient drug rehabilitation, although the timeframe which is covered can vary. Private health insurance will more than likely cover the first 4 weeks of alcohol and drug treatment, but there are people whose coverage is more extensive and can cover a more significant stay in a Castro Valley, California drug rehabilitation center. It is advisable that individuals seek advice of their plan directly with the help of their rehab program to decide what is included by their private health insurance.