Levels of Mental Health Care Explained: Outpatient, IOP, PHP and Inpatient

Mental health care is organized by intensity. Outpatient care means scheduled visits while you live at home, and the number and length of visits vary. An intensive outpatient program (IOP) adds several hours of treatment a week, and Medicare defines it as at least 9 hours a week. A partial hospitalization program (PHP) is a full-day program, at least 20 hours a week under Medicare rules, for people who would otherwise need a hospital bed. Inpatient care is a 24-hour hospital-based program for people who cannot be adequately served in the community.

The right level is the least intensive one that is safe and can actually help. This guide explains each level, who it is for, how New York licenses programs, how insurance treats them, how stepping up and down works, and where an outpatient practice fits.

If you are thinking about suicide or are in crisis, call or text 988 (the 988 Suicide & Crisis Lifeline) or go to the nearest emergency room.

The levels at a glance

Hours and schedules vary between programs and payers. The Medicare definitions above are a useful floor, not a description of every program. Ask any program exactly how many hours a week it runs, for how many weeks, and what is included.

Outpatient care

Depression, anxiety, ADHD, PTSD and many other conditions can often be treated in outpatient care, which can include psychotherapy, psychiatric evaluation and medication management, and coordination with primary care. New York's definition of outpatient clinic treatment notes that the intensity and number of visits may vary, so visits can become more frequent for a period, for example during a medication change, without moving to a program.

Outpatient care is the right level when you are safe between visits, symptoms are not preventing basic self-care, and you can use what you learn in sessions in daily life. It is also where most people return after a higher level of care, so the outpatient team is often the long-term anchor. The guide on psychiatric medication management explains visit frequency and monitoring.

Intensive outpatient programs (IOP)

An IOP is a structured program of several sessions a week while you live at home. In New York, OMH describes IOP as outpatient services delivered at an intensive level, above the usual frequency of clinic care, for people who may benefit from more intensive treatment for a limited time. Ask each program what its schedule is and what mix of group, individual and psychiatric visits it includes; some people can keep part of their work or school commitments.

Under Medicare, a physician must certify that a patient needs at least 9 hours of IOP services a week, and recertify at least every 60 days, describing the patient's response, continuing symptoms that put them at risk of relapse or hospitalization, and discharge goals. Medicare began paying for IOP services under a new benefit in its 2024 hospital outpatient rule, which CMS described as closing a gap between traditional outpatient therapy and partial hospitalization or inpatient care.

Ask whether a program focuses on a particular group or problem, such as mood and anxiety, self-harm, eating disorders, adolescents or substance use, and whether that matches your needs.

Partial hospitalization programs (PHP)

A PHP is close to a hospital day without the overnight stay. OMH defines partial hospitalization as active treatment designed to stabilize or ease acute symptoms in a person who would otherwise need hospitalization.

Medicare's certification for PHP requires that the person needs at least 20 hours a week of services and would require inpatient psychiatric care if partial hospitalization were not provided. That second condition describes the purpose: PHP is an alternative to a hospital stay, or a step down from one, not a more intensive version of weekly therapy.

At 20 or more hours a week, a PHP usually leaves little room for work or school while you attend. Ask the program about documentation for leave; the guide on FMLA leave for mental health explains how that works.

Residential and inpatient care

Residential programs provide round-the-clock structure outside the hospital. In New York, OMH licenses crisis residences that provide 24-hour supervision, generally for up to 30 days, to help people avoid hospitalization, and Residential Treatment Facilities for children and young people aged 5 up to 21 who need longer-term treatment than an inpatient unit provides. Residential programs for substance use and eating disorders are licensed and run separately, so ask about licensing, staffing, medical oversight and discharge planning. The site's list of residential treatment centers is one starting point.

Inpatient psychiatric programs in New York run 24 hours a day in general hospitals, private psychiatric hospitals and state psychiatric centers, and include psychiatric, medical, nursing and social services for assessment and treatment. People can reach them through a hospital emergency room or a Comprehensive Psychiatric Emergency Program (CPEP), a hospital-based program that can hold adults for extended observation for up to 72 hours. New York law allows a hospital to keep a person as an emergency patient for up to 15 days when their mental illness is likely to result in serious harm to themselves or others. The guides on where to go in a psychiatric emergency in New York City and the first month after a hospitalization cover what comes before and after.

How clinicians decide which level fits

There is no single test for level of care. Clinicians weigh several questions together, and the answer can change from week to week:

• Safety: Is there a risk of suicide, self-harm, harm to others, or being unable to stay safe because of confusion, psychosis or intoxication?
• Severity: How intense are the symptoms, and are they getting worse?
• Function: Can the person eat, sleep, keep basic routines, and attend work or school?
• Response so far: Has the current level of care been tried for long enough, and has it helped?
• Medical issues: Are there physical health problems, withdrawal risks or medication effects that need monitoring?
• Substance use: Is alcohol or drug use complicating treatment or safety?
• Support: Is there a stable home and someone who can help between appointments?
• Preference and practicality: What will the person actually attend, and what does their insurance cover?

The general principle is to use the least restrictive setting that is safe and likely to work. Someone with severe symptoms but strong support and no safety risk may do well in an IOP, while someone with milder symptoms but no safe place to stay may need more. If you disagree with a recommendation, ask the clinician to explain which of these factors drove it.

How New York licenses these programs

In New York, the Office of Mental Health (OMH) licenses mental health programs. The program names you see in New York differ a little from national terms:

• Clinic outpatient care is now called Mental Health Outpatient Treatment and Rehabilitative Services (MHOTRS), regulated under 14 NYCRR Part 599, which OMH revised on November 23, 2022.
• An MHOTRS clinic must get OMH approval before offering an Intensive Outpatient Program, which OMH describes as more intensive services for a limited time for people who may benefit from them.
• OMH describes IOP as potentially less disruptive to community life than a Comprehensive Psychiatric Emergency Program (CPEP), a partial hospitalization program or inpatient hospitalization.
• Other OMH-licensed program types include Assertive Community Treatment (ACT), Continuing Day Treatment and Personalized Recovery Oriented Services (PROS), the last two for adults with serious mental illness.
• Programs run by hospitals may be licensed under Article 31 of the Mental Hygiene Law or Article 28 of the Public Health Law.

A private practice of licensed clinicians is not the same thing as an OMH-licensed clinic, IOP or PHP, and in New York an IOP is an optional clinic service that needs OMH approval. When comparing options, ask whether a program is OMH-licensed and which program type it is.

Substance use programs in New York are licensed separately, by the Office of Addiction Services and Supports (OASAS). Addiction treatment widely uses the ASAM Criteria, which ASAM describes as the most widely used standards for placement, continued service and transfer; the fourth edition was released in 2023. See addiction psychiatrist vs general psychiatrist for when specialist care fits.

Insurance coverage

Coverage for each level depends on your plan, and the details matter.

• Parity. Under the federal Mental Health Parity and Addiction Equity Act, covered mental health and substance use benefits should be treated similarly to medical and surgical benefits, including copays, deductibles, visit limits and prior authorization.
• Medicare. Medicare covers inpatient psychiatric care, partial hospitalization, outpatient therapy and, since 2024, intensive outpatient services.
• Prior authorization and reviews. Ask the program whether your insurer requires prior authorization or periodic reviews, whether the program handles them, and what happens if a review is denied. Parity rules require these requirements to be comparable to those for medical care.
• Network. Coverage for out-of-network programs varies by plan. Call your insurer before admission when you can, and ask about coverage for the specific level of care.

If a claim or continued stay is denied, you can appeal. See mental health parity rights and appealing a denied claim.

How stepping up and down works

Levels of care are meant to be used flexibly. Moving up is not a failure, and moving down is not abandonment.

Signs it may be time to step up

• Symptoms worsening despite more frequent outpatient visits.
• Missing work or school, or being unable to manage basic tasks.
• Self-harm, or thoughts of suicide that are more frequent or harder to manage.
• Substance use escalating.
• New psychotic symptoms or signs of mania.
• Needing daily support to follow a treatment plan, such as with an eating disorder.

Any immediate safety concern is an emergency, not a scheduling question. Use 988, call 911 or go to an emergency room. The guide on safety planning for suicidal thoughts explains how to prepare for hard moments.

Stepping down

Good programs plan discharge from the first day. Common paths are inpatient to PHP or IOP, PHP to IOP, and IOP to outpatient care. OMH guidance notes that clinics can provide off-site services to support transitions between levels, for example after a psychiatric emergency or emergency room visit or after an inpatient discharge. Before discharge, ask the program to confirm:

A worked example

A man in his 40s with depression has seen a psychiatrist monthly and a therapist weekly. After a job loss, he stops sleeping, misses therapy and begins having thoughts of suicide. His family takes him to an emergency department, and he is admitted to an inpatient unit for several days while medication is adjusted and a safety plan is written. He then steps down to a PHP for structured daily support, then to an evening IOP as he returns to job searching. Throughout, his outpatient psychiatrist receives updates, and his first outpatient appointment is booked before he leaves the IOP. Each step matched the level of risk and need at that moment.

Where an outpatient practice fits

Dr. Lewis's practice provides outpatient care: psychiatric evaluation and medication management, psychotherapy including CBT and DBT, coaching, lab testing, and nutrition and lifestyle psychiatry. The team includes psychiatrists, psychiatric nurse practitioners and psychotherapists. If you are deciding whether outpatient care is enough, or planning care after a program, a free discovery call can cover care options and scheduling. The practice is out of network with all insurance plans, including Medicare and Medicaid. If you need care that is in network with your plan, ask the team on the discovery call about options. The medication management and psychotherapy pages describe outpatient services, and the Choosing Psychiatric Care guide collects every article in this series.

Frequently asked questions

Can I work while in an intensive outpatient program?

Sometimes. An IOP is less intensive than a day program (Medicare's certification floor is 9 hours a week), so some people keep part of their work or school schedule; ask each program about its hours. A partial hospitalization program requires at least 20 hours a week and usually leaves little room for work or school.

Is a partial hospitalization program the same as being admitted?

No. In a PHP you go home every night. Medicare describes it as care for people who would otherwise need inpatient psychiatric treatment, so it is an alternative to admission or a step down from it.

Who decides which level of care I need?

A clinician assesses safety, symptoms, functioning and support at home, often using structured criteria, and recommends a level. You can ask why a level was recommended, and insurers also review medical necessity for higher levels of care.

How do I find an IOP or PHP in New York?

Ask your current psychiatrist or therapist, the hospital where you were treated, or your insurer for programs in network. Check that the program is licensed by the New York State Office of Mental Health and ask what it specializes in.

Can I keep my outpatient psychiatrist while in a program?

Ask the program who will manage medication while you attend and how it will share information with your outpatient prescriber, so the handoff in each direction is smooth.

What if my insurer denies coverage for a higher level of care?

Ask the program to request a peer-to-peer review, and file an appeal. Federal parity law requires that limits on mental health benefits be comparable to those on medical benefits for most plans.

Does inpatient care mean I will be held against my will?

Many admissions are voluntary. New York law also allows a hospital to keep a person as an emergency patient for up to 15 days when their mental illness is likely to result in serious harm to themselves or others, and other sections of the law set out further procedures. The emergency department or psychiatric emergency program can explain the process that applies to you.

Sources

1. 42 CFR 424.24: Requirements for medical and other health services furnished by providers under Medicare Part B. Electronic Code of Federal Regulations, 2025. ecfr.gov
2. CY 2024 Medicare Hospital Outpatient Prospective Payment System and Ambulatory Surgical Center Payment System Final Rule (CMS-1786-FC). Centers for Medicare & Medicaid Services, 2023. cms.gov
3. 14 NYCRR Part 599 Mental Health Outpatient Treatment and Rehabilitative Service Guidance. New York State Office of Mental Health, 2024. omh.ny.gov
4. Mental Health and Substance Use Disorder Parity. U.S. Department of Labor, Employee Benefits Security Administration, 2026. dol.gov
5. About the ASAM Criteria. American Society of Addiction Medicine, 2026. asam.org
6. Licensed Program Type Definitions. New York State Office of Mental Health, 2026. omh.ny.gov
7. New York Mental Hygiene Law Section 9.39: Emergency admissions for immediate observation, care, and treatment. New York State Senate, 2026. nysenate.gov

Educational information, not medical, tax or legal advice. Decisions about diagnosis, medication and treatment belong with a clinician who knows your history.