For most insurance plans, the answer is yes. Federal parity law requires that addiction and mental health treatment be covered the same way as any other medical condition, so a plan that pays for surgery or diabetes care generally has to cover rehab too. The real questions are more specific. Which levels of care does your plan include, from detox through outpatient support, and what will you or your loved one actually pay out of pocket? Those answers depend on your particular policy, and we can help you read them.