If someone requires treatment for drug and alcohol addiction and is lucky enough to be covered under health insurance, most drug rehab centers in Palo Alto, California accept health insurance and will cooperate with clients to find out which types of treatment are covered. Most private health insurance companies cover outpatient and inpatient alcohol and drug rehabilitation, but the time in rehab which is included can vary. Private health insurance will more than likely cover the first 4 weeks of alcohol and drug rehab, although there are clients whose coverage is more extensive and could also extend to a more long-term time in a drug rehab program. It is recommended that individuals consult with their plan directly with the help of their rehab facility to figure out which services may be included by your private health insurance.