How long does rehab take on average?

Most addiction rehab lasts 30 to 90 days, though the full range runs from a few days of detox to a year or more of outpatient care. Medical detox takes 3–10 days, residential programs commonly run 28–90 days, and outpatient treatment continues for several months. Research links stays of 90 days or longer to the strongest long-term results.

Is 30 days long enough for rehab?

Thirty days can be a helpful start, but it is often not enough on its own. A 30-day residential stay is a common entry point, yet outcomes improve with at least 90 days of total treatment. Many people finish a 30-day program and then step down to outpatient care and aftercare to protect their progress.

How long does medical detox take?

Medical detox usually takes 3 to 10 days, depending on the substance and severity. Alcohol and benzodiazepine withdrawal often require close medical supervision, while opioid detox is rarely dangerous but uncomfortable. Detox only clears substances from the body — lasting recovery requires therapy and continued treatment afterward.

Does insurance limit how long I can stay in rehab?

Insurance can influence program length, but it does not set a fixed limit on recovery. Under federal parity rules, most plans — including Delaware Medicaid — must cover medically necessary addiction treatment comparably to other health conditions. Coverage is based on medical necessity and reviewed periodically, so your care team can request continued stays when clinically justified.

What happens after rehab ends?

After a structured program, most people continue with aftercare to maintain recovery. This often includes outpatient counseling, support groups, sober living, or alumni programs. Stepping down gradually — rather than stopping all support at once — lowers relapse risk and helps you rebuild work, family, and daily routines with ongoing guidance.

How Long Does Rehab Take? Program Lengths (2026)

Most addiction rehab takes 30 to 90 days, but the right length depends on the level of care: medical detox runs 3–10 days, residential programs typically last 28–90 days, and outpatient treatment can continue for several months. Research consistently shows that staying in treatment for at least 90 days produces the best, most lasting outcomes.¹

Key takeaways

Medical detox usually takes 3–10 days, depending on the substance.
Inpatient and residential rehab most often run 28, 60, or 90 days.
Outpatient care and aftercare can last several months to a year or more.
Research links 90+ days of treatment to the strongest, most durable results.¹

How long does rehab take by program type?

There is no single answer, because "rehab" covers several levels of care. The American Society of Addiction Medicine describes a continuum — from medically managed detox to outpatient counseling — and most people move through more than one stage.²

The table below shows typical lengths for each stage. Your own timeline may be shorter or longer based on the substance, how long you have used, and whether other health conditions are present.

Stage of care	Typical length	What it involves
Medical detox	3–10 days	Supervised withdrawal with medication to ease symptoms and stay safe
Residential / inpatient	28–90 days	Live-in care: therapy, structure, and medical support
Partial hospitalization (PHP)	2–4 weeks	Full-day treatment while living at home or in sober housing
Intensive outpatient (IOP)	1–3 months	9–20 hours of therapy a week around work or family
Outpatient & aftercare	3–12+ months	Ongoing counseling, relapse prevention, and support groups

How long does detox take?

Most medically supervised detox programs in Delaware last 3 to 10 days. Alcohol and benzodiazepine withdrawal often need close medical monitoring, while opioid withdrawal is rarely dangerous but can be very uncomfortable.

Detox clears substances from your body — it is the first step, not a complete treatment. Without therapy afterward, the risk of returning to use stays high.¹

How long is inpatient rehab?

Residential rehab is most commonly offered in 30-, 60-, or 90-day programs. A 30-day stay is a frequent starting point because many insurance plans authorize it and it fits within work or family leave.

Longer stays generally lead to better outcomes. NIDA notes that programs lasting less than 90 days are of limited effectiveness, and that treatment lasting significantly longer is often recommended for lasting recovery.¹

How long does outpatient treatment last?

Intensive outpatient programs usually run 1 to 3 months, while standard outpatient care and aftercare can continue for a year or more. Many people step down gradually — from residential, to PHP, to IOP, to weekly counseling — rather than stopping all support at once.

What affects how long rehab takes?

The substance. Alcohol, opioids, and stimulants each have different withdrawal and recovery timelines.
Severity and history. Longer or heavier use generally calls for longer treatment.
Co-occurring conditions. Depression, anxiety, or trauma treated alongside addiction can extend care.
Insurance and cost. Coverage can shape program length; Delaware Medicaid and most private plans cover medically necessary treatment.

Finding the right program length in Delaware

The right length is the one that matches your needs — not the shortest option that fits a calendar. If you are unsure where to start, a professional assessment can recommend the appropriate level of care.

You can browse Delaware treatment centers by level of care, or call the free, confidential SAMHSA National Helpline at 1-800-662-4357, available 24/7.³ If you or someone you love is in crisis, call or text 988.

Find a Delaware treatment center

How Long Does Rehab Take? Program Lengths by Level of Care