Types of Care
Intensive Outpatient Programs (IOP) and Partial Hospitalization
What Is an Intensive Outpatient Program, and How Is It Different From Partial Hospitalization?
An intensive outpatient program (IOP) gives you structured addiction treatment for usually 9 or more hours a week, spread over 3 to 5 days, while you live at home. Partial hospitalization (PHP) is a step more intensive, with at least 20 hours a week. SAMHSA lists 5,474 facilities with IOP and 1,879 with partial hospitalization (October 2026); find them in the treatment finder.
What an Intensive Outpatient Program Is
An intensive outpatient program, or IOP, is structured addiction treatment that takes up a real part of your week while you keep living at home. SAMHSA’s guide to intensive outpatient treatment says programs generally run 9 or more hours a week, spread over 3 to 5 days. Medicare.gov describes IOP as the level between traditional once-a-week counseling and inpatient or partial hospitalization care.
NIDA describes it as more intensive, coordinated outpatient care with individual and group sessions and medication support. NIAAA puts it simply: coordinated outpatient care for complex needs.
SAMHSA lists 5,474 facilities that offer intensive outpatient treatment and 1,879 that offer partial hospitalization (October 2026). Search the treatment finder with the IOP filter, or check your state page.
IOP vs. PHP vs. Standard Outpatient
Partial hospitalization (PHP), sometimes called day treatment, sits one step above IOP. Medicare.gov describes it as a structured program that serves as an alternative to inpatient care, usually with 4 to 8 hours of care each day.
| Standard outpatient | Intensive outpatient (IOP) | Partial hospitalization (PHP) | |
|---|---|---|---|
| Hours a week | Fewer than IOP; often one to three visits | Usually 9 or more, over 3 to 5 days | At least 20 under Medicare’s rules |
| A typical day | A single session | A few hours of groups and counseling | Usually 4 to 8 hours of care |
| Where you sleep | Home | Home | Home |
| Who it fits | Stable recovery, or stepping down | More support than weekly visits | Would otherwise need inpatient care |
| Common settings | Clinics, offices, telehealth | Treatment programs, hospitals, health centers | Hospital outpatient departments, community mental health centers |
Sources: SAMHSA TIP 47, Medicare.gov and FindTreatment.gov.
In the levels of care used across the field, IOP and PHP together make up the middle tier, between standard outpatient care and residential or inpatient rehab. For a side-by-side view of every level, use the levels of care tool.
Who an IOP Is for
An IOP can be a good match if:
- weekly counseling hasn’t been enough, but you don’t need 24-hour care;
- you’re stepping down from detox or residential treatment and want strong support at first;
- you have a safe, stable home and can get to the program several times a week;
- you need to keep working, studying or caring for family.
Partial hospitalization fits people who need more: Medicare requires a provider to certify that you would otherwise need inpatient treatment. For IOP, Medicare.gov says you don’t need to qualify for inpatient care.
The level isn’t something you have to pick alone. NIAAA says a complete assessment of a person’s situation guides which level is right, and a clinician or the program’s intake staff can do one.
NIDA’s research guide adds that intensive day treatment can match residential programs in services and effectiveness, depending on the person. For many people, that makes IOP or PHP a real alternative to living at a program.
What Happens in an Intensive Outpatient Program
SAMHSA’s guide says groups form the core of most IOPs, and group sessions often run about 90 minutes. Shorter education sessions are common too. Over a week you can expect a mix of:
- Group counseling and therapy, including skill-building and relapse prevention groups;
- Individual counseling with your own counselor;
- Education about substance use, recovery and health;
- Medication management, including medication for opioid or alcohol use disorder;
- Drug and alcohol testing, used to guide treatment;
- Case management, help with housing, work, legal or benefits problems;
- Crisis coverage so you can reach someone around the clock;
- Links to peer support groups in the community.
SAMHSA’s guide lists all of these as core IOP services. Medicare.gov describes much the same: group and individual therapy, education and medication management.
If you take buprenorphine, methadone or naltrexone, ask whether the program will work with your prescriber. Medicare also covers IOP services at Opioid Treatment Programs, better known as methadone clinics, for people getting treatment for opioid use disorder. See medication for opioid use disorder.
How Long an IOP Lasts
SAMHSA’s guide says the traditional length was 4 to 12 weeks, and many programs now continue longer. Your length depends on your progress.
After an IOP, the usual next step is standard outpatient care. NIDA says that after a course of intensive treatment, providers should arrange a move to less intensive continuing care. Recovery support such as peer groups or a sober living home can also help.
Intensive Outpatient Program Requirements
People often ask what it takes to get into an IOP. Requirements vary by program and payer, but common ones include:
- An assessment showing that IOP is the right level for you.
- Medical stability. If you’re at risk of dangerous withdrawal, you’ll usually need detox first. Alcohol and benzodiazepine withdrawal can be life-threatening and need medical supervision; see withdrawal.
- A care plan calling for enough hours. Medicare covers IOP when your plan calls for at least 9 hours of services a week, and PHP when it calls for at least 20.
- Attendance. Programs expect you at scheduled groups. Ask what happens if you miss one.
Ask each program about its own rules for testing, medications and schedule changes.
Where to Find It: Intensive Outpatient by State
SAMHSA's FindTreatment.gov lists 5,474 substance use treatment facilities with this service (intensive outpatient) across 54 states and territories, checked October 2026. Pick a state for its facilities, cities and treatment agency.
IOP When You Also Have Depression, Anxiety or Trauma
Substance use and mental health conditions often travel together. FindTreatment.gov says about half of people who have a substance use disorder or a mental health disorder will also experience the other, and that addressing both is critical for recovery. NIDA adds that treating co-occurring conditions at the same time, rather than separately, usually works better.
That matters when you choose an IOP. Some programs focus only on substance use, some only on mental health, and some offer integrated care that treats both. Integrated care, in FindTreatment.gov’s words, brings different kinds of expertise together so that treatment for one condition doesn’t interfere with treatment for the other.
If you’re already seeing a therapist or psychiatrist, ask whether the IOP will coordinate with them. If you aren’t, ask whether the program includes a psychiatric evaluation. SAMHSA’s guide lists psychiatric care among the services IOPs should provide or arrange.
How Family Fits Into an IOP
Because you go home every evening, your family is part of your recovery from day one. SAMHSA counts family involvement among its five signs of quality treatment, noting that family members have an important role in understanding how addiction affects a family and in providing support.
Many IOPs offer family education sessions or family counseling. Ask what’s available and how loved ones can take part. If you’re the family member, the guide to helping someone with an addiction explains how to support a person in treatment while looking after yourself.
Moving Up or Down Between Levels
An IOP isn’t a one-time placement. NIDA’s research guide says a continuing care approach, where the intensity of treatment changes with a person’s needs, gives many people the best results.
In practice, that might mean starting in PHP and moving to IOP as things settle, or stepping up from weekly counseling to IOP during a hard stretch. Neither direction is a failure. Ask your counselor regularly whether your current level still fits.
Paying for IOP or PHP
Most IOPs accept insurance. Medicare covers both IOP and PHP when you meet its conditions, at hospitals, community mental health centers, Federally Qualified Health Centers, rural health clinics and, for opioid use disorder, Opioid Treatment Programs.
Across all facilities SAMHSA lists, 9,569 accept Medicaid and 9,562 take private insurance (October 2026). For Medicaid details, see rehab that takes Medicaid. For private plans, see does insurance cover rehab. The payment checker shows what your coverage must pay for.
How to Choose an IOP
When you call a program, ask:
- How many hours a week, on which days, and at what times? Are there evening groups?
- How long does the program usually last?
- Is it licensed by the state? What therapies do you use?
- Do you offer or coordinate medication treatment?
- Do you treat depression, anxiety or trauma alongside substance use?
- Can any sessions be done by telehealth?
- What happens when I finish? Do you help set up continuing care?
The guide to choosing a rehab covers warning signs, and what to expect in rehab walks through intake and a typical day. SAMHSA’s National Helpline (1-800-662-4357) is free and confidential, 24/7, if you’d like help finding an IOP.
Frequently Asked Questions
How Many Hours a Week Is IOP?
SAMHSA's guide to intensive outpatient treatment says programs generally provide 9 or more hours a week over 3 to 5 days, and some offer fewer. Medicare covers IOP when your care plan calls for at least 9 hours of services a week.
How Long Does an Intensive Outpatient Program Last?
SAMHSA's guide describes the traditional length as 4 to 12 weeks, with many programs now running longer. Your length depends on your progress and your plan, and many people step down to standard outpatient care afterward.
Can I Work While in an IOP?
Often, yes. Because you live at home and attend a few days a week, many people keep working or studying. Ask whether the program runs morning, daytime or evening groups so you can plan around your schedule.
Is There Virtual IOP?
Some programs offer telehealth sessions. FindTreatment.gov says telemedicine can be a key part of a treatment plan, especially if you live far from a facility. Ask whether a program's groups run by video and whether your plan covers them.
Do I Need to Qualify for Inpatient Care to Get IOP?
Not for Medicare. Medicare.gov says you don't need to qualify for inpatient treatment to get intensive outpatient program services. Partial hospitalization is different: your provider must certify that you would otherwise need inpatient care.
Are IOPs Only for Addiction?
No. Many IOPs treat depression, anxiety and other mental health conditions too, and Medicare covers IOP for mental health conditions including substance use disorders. If you have both, look for a program that treats them together.
More on Types of Care
- DetoxWhat medical detox involves, how long it takes and where to find it
- Inpatient RehabHow residential treatment works, short and long-term programs
- Outpatient RehabTreatment while you live at home, and who it suits
- Sober LivingRecovery residences, certification and what to check
- Alcohol RehabTreatment options for alcohol, including medications
- Drug RehabThe types of drug treatment and how to choose
This guide explains treatment options in plain language from official sources. It isn't medical advice; a clinician can assess what care fits your situation.
Sources
- SAMHSA TIP 47: Clinical Issues in Intensive Outpatient Treatment (NCBI Bookshelf)
- Medicare.gov: Intensive Outpatient Program Services
- Medicare.gov: Partial Hospitalization
- NIDA: Treatment
- NIDA: Principles of Drug Addiction Treatment (Third Edition)
- NIAAA: Types of Alcohol Treatment
- SAMHSA: Finding Quality Treatment for Substance Use Disorders
- SAMHSA FindTreatment.gov: What to Expect
- SAMHSA FindTreatment.gov listing data, checked October 2026