PHP or IOP? How Clinicians Decide (The ASAM Criteria in Plain Language)

✓ Medically reviewed by Dr. David T. Gigliotti, DO, FASAM, Medical Director · Reviewed October 16, 2026

Clinicians decide between PHP and IOP using The ASAM Criteria, a national set of standards from the American Society of Addiction Medicine. The assessment looks at six areas of your life, called dimensions, and matches the findings to a level of care. In outpatient terms, that means Level 1 (outpatient, under 9 hours a week), Level 2.1 (intensive outpatient, 9 to 19 hours a week), or Level 2.5 (partial hospitalization, 20 or more hours a week). Many insurers use the same criteria to decide what they will authorize.

This article explains the tool itself. For a side-by-side of the three programs, read PHP vs IOP vs OP: how to choose a level of care. Ripple Recovery Centers offers all three outpatient levels in Barrington and Cherry Hill, NJ. We do not offer detox or residential beds. If an assessment points to either one, we arrange placement first.

What is The ASAM Criteria and who uses it?

The ASAM Criteria is a set of standards for deciding where a person with addiction should start treatment, when they should move to a different level, and when they are ready to step down. ASAM describes it as the most widely used and comprehensive set of standards for placement, continued service, and transfer of patients with addiction and co-occurring conditions (ASAM, About The ASAM Criteria). It was first published in 1991 and is now in its Fourth Edition (Colorado HCPF, Fourth Edition summary).

Three groups use it. Clinicians use it to assess people and recommend a level of care. Insurers and managed care organizations use it as medical necessity criteria, meaning the rules for what they will pay for. Many state Medicaid agencies use it to define covered services (Medicaid.gov, SUD clinical guidelines resource).

What are the six dimensions of an ASAM assessment?

Instead of asking only “how much do you use,” an ASAM assessment asks six sets of questions and weighs them together. Here they are as clinicians and insurers commonly describe them (Montana DPHHS, ASAM dimension definitions), each with an example of how it changes the recommendation.

Dimension 1: Acute intoxication and withdrawal potential. Are you intoxicated right now, and what happens to your body when you stop? Someone drinking heavily every day may face withdrawal that needs medical supervision, and is routed to detox before any outpatient level.

Dimension 2: Biomedical conditions and complications. Do you have physical illnesses, other than withdrawal, that need attention or could complicate treatment? A person with uncontrolled diabetes or a recent injury may need a program that coordinates with medical care, or a higher level of care until the condition is stable.

Dimension 3: Emotional, behavioral, and cognitive conditions. Do you have psychiatric symptoms or thinking problems that affect treatment? Someone with active depression and trouble getting out of bed may be recommended for PHP, where there is daily contact, rather than IOP, where days pass between sessions.

Dimension 4: Readiness to change. How aware are you that something needs to change, and how committed are you to treatment? A person attending only because a spouse insisted usually needs more structure and contact. A person who has already stopped using and wants help staying stopped can often start at a lower level.

Dimension 5: Relapse, continued use, or continued problem potential. If you walked out of this assessment with no treatment, how likely is it that you would use today? Someone who has relapsed within days of every past attempt is usually recommended for a more intensive level. Someone with months of stability and one slip is often recommended for IOP or OP.

Dimension 6: Recovery environment. Does your home, work, or social situation support recovery or threaten it? A person living with someone who uses, or with no safe place to sleep, may need a higher level of care or sober housing before outpatient treatment makes sense. A person with a supportive family and a stable job is a good candidate for IOP.

The Fourth Edition, released in 2023, reorders these dimensions. Readiness to change is now considered across all of them, and a new Dimension 6, person-centered considerations, covers your own goals and preferences (ASAM, Fourth Edition). The questions above are still the ones your clinician is answering.

Which ASAM levels of care are outpatient?

The ASAM Criteria describes a full continuum, from outpatient care through inpatient care. Three levels are outpatient, and Ripple offers all three.

ASAM level	Fourth Edition name	Name most people use	Hours of clinical service per week	Ripple program
Level 1	Outpatient (the Fourth Edition uses 1.5 outpatient therapy and 1.7 medically managed outpatient, and gives 1.0 to remission monitoring)	OP	Fewer than 9 hours	Outpatient program
Level 2.1	Intensive outpatient	IOP	9 to 19 hours	Intensive outpatient program
Level 2.5	High-intensity outpatient	PHP	20 or more hours	Partial hospitalization program

The hours describe the program, not your personal schedule. Our admissions team confirms the actual days and times for your location before you start.

Level 3 (residential) and Level 4 (medically managed inpatient) are not offered at Ripple. If an assessment points there, we arrange placement. See What detox placement means and what happens next.

Why does ASAM now call PHP “high-intensity outpatient”?

In the Fourth Edition, ASAM renamed Level 2.5 from “partial hospitalization” to “high-intensity outpatient.” Level 2.1 kept its name, intensive outpatient (Illinois DHS, Third to Fourth Edition transition). ASAM’s own policy writing now describes Level 2 as “intensive outpatient (IOP)/high-intensity outpatient” (ASAM, 2025 Medicare policy post).

The new name is more accurate. “Partial hospitalization” sounds like a hospital stay, and it is not. It is a full-day outpatient program where you go home every evening.

Ripple keeps using the familiar name, PHP, because that is the term most people search for and the term you will commonly see on insurance paperwork. When you see PHP on our site, it means ASAM Level 2.5.

How does an assessment at Ripple turn into a recommendation?

Here is the sequence, step by step.

1. A short conversation. When you reach out, our admissions team asks about your substance use, your health, and what is going on right now. This is the screen that tells us whether the next step is detox placement or a scheduled assessment.
2. Insurance check. We verify your benefits and explain what your plan covers before you start. If prior authorization is required for PHP or IOP, this is when we find out.
3. The clinical assessment. A licensed clinician walks through the six dimensions with you: substance use and withdrawal risk, physical health, mental health, readiness, relapse risk, and your living situation. It is a conversation, not a form.
4. The recommendation. The clinician recommends PHP, IOP, or OP and explains why, dimension by dimension. If Dimension 1 points to withdrawal risk, the recommendation is detox first. If you disagree, say so. Your preferences are part of the Fourth Edition assessment.
5. Scheduling. We schedule your start and confirm your days and times.

For what to ask any program, read How to choose a treatment center. To begin, visit admissions.

How do insurers use the same criteria for prior authorization?

Many commercial plans and state Medicaid programs use The ASAM Criteria as their medical necessity criteria for addiction treatment (ASAM). When a program asks your plan to authorize PHP or IOP, the plan’s reviewer typically looks at the same six dimensions and asks whether the findings support that level.

This is why a thorough assessment protects you. When the record documents withdrawal risk, co-occurring symptoms, relapse history, and home environment, the authorization request has what the reviewer needs. Rules and approval lengths vary by plan. Our admissions team handles the request and tells you what your plan decided before you start. Ripple works with many major insurance plans; coverage depends on your plan, and we confirm your benefits before you start. Verify your insurance.

When does the answer change?

A level of care is a starting point, not a sentence. The ASAM Criteria covers continued service and transfer, so the assessment is repeated as you go.

Step down. As withdrawal risk fades, symptoms stabilize, and your home situation improves, the recommendation changes. Most people step from PHP to IOP, then to OP, with the same clinical team. Read How long does PHP last? and How long does IOP last?.

Step up. If you are in IOP and relapse repeatedly, lose stable housing, or develop symptoms that need daily contact, the recommendation may move to PHP. That is not failure. It is the tool working the way it is designed to.

Where we stand

Three things we believe, and the evidence behind them.

First, the assessment is the treatment plan, and a program that skips it is guessing with your life. Any program that recommends the same level of care for everyone who calls is selling a bed, not matching a person to care. The ASAM Criteria exists so that the recommendation follows the six dimensions, not the schedule or the census (ASAM). If a program cannot tell you, dimension by dimension, why it recommended PHP over IOP, ask another program.

Second, stepping up is not failure, and stepping down is not a reward. The criteria cover continued service and transfer because the right level changes as you do (ASAM). We have watched people treat a move from IOP back to PHP as a verdict on their character. It is a dose adjustment. Nobody calls it failure when a doctor changes a blood pressure medication.

Third, the name change matters, and the industry should catch up. ASAM renamed Level 2.5 “high-intensity outpatient” because “partial hospitalization” scares people who would do well in it and misleads people who need a hospital (Illinois DHS). We keep PHP on this site because that is the term you search for and the term on your insurance paperwork, but we say what it means every time: a full day of treatment, then your own bed at night.

Frequently asked questions

Choosing a level of care in Camden County, NJ

Ripple Recovery Centers offers PHP, IOP, and OP at two Camden County locations: 630 Clements Bridge Road, Barrington, NJ 08007, between the White Horse Pike (Route 30) and I-295, and 103 East Gate Drive, Cherry Hill, NJ 08034, off Marlton Pike East (Route 70) just east of I-295. People come from Haddon Heights, Runnemede, Bellmawr, Haddonfield, Collingswood, Voorhees, Pennsauken, Maple Shade, and Marlton, and from Philadelphia over the bridge.

Camden County reported 206 suspected drug overdose deaths in 2024, down about 37 percent from 327 in 2023, according to the county’s 2025 update (Camden County). A careful assessment matches people to a program that is neither too much nor too little for them.

New Jersey residents who need help finding treatment, regardless of insurance status or ability to pay, can use the state’s ReachNJ line.

Sources

1. ASAM, About The ASAM Criteria
2. ASAM, The ASAM Criteria Fourth Edition
3. ASAM, Medicare Improves SUD Coverage in 2025 (ASAM policy post, PDF)
4. ASAM, Level of Care Certification
5. Illinois Department of Human Services, The ASAM Criteria: Transition from 3rd Edition to 4th Edition
6. Colorado Department of Health Care Policy and Financing, The ASAM Criteria Fourth Edition summary
7. Medicaid.gov, Overview of Substance Use Disorder Care Clinical Guidelines: A Resource for States
8. Montana Department of Public Health and Human Services, ASAM Dimension Definitions
9. Camden County, Overdoses Continue to Decline in Camden County (March 2025)
10. New Jersey Department of Human Services, ReachNJ