Most insurance plans do cover rehab. Federal parity law requires addiction and mental health treatment to be covered like other medical care. So the answer is usually yes. The better questions are which levels of care your plan covers, and what you or your loved one will pay out of pocket. Detox, inpatient, and outpatient can each be covered differently. Your deductible and network matter too. Call your insurer, or let us check your benefits and explain them in plain terms.