Arision Treatment CenterWarner Center · Woodland HillsPartial hospitalization · ASAM 2.5
A full day of care. No overnight stay.
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Arision’s PHP in Woodland Hills is a partial hospitalization program for adults in Los Angeles. It treats addiction, and often anxiety, depression or trauma too. It meets five days a week, 9am to 3pm, in Warner Center. Every client at Arision starts here.
A partial hospitalization program, or PHP program, is the most structured outpatient care there is. You get treatment most of the weekday, with no overnight stay.
The name confuses a lot of people. PHP isn’t a hospital stay. Medicare’s own rules call it an intensive program with less than 24-hour care, outside any inpatient or live-in setting. Its consumer page says it’s offered in place of inpatient care, for people who don’t need a bed overnight.
The ASAM Criteria, the national guide for matching people to care, calls this Level 2.5. Programs at this level give at least 20 hours of care a week. ASAM’s 2023 edition calls this level high-intensity outpatient care. Arision’s PHP in Woodland Hills runs about six hours a day, five days a week. See how it compares with all of Arision’s programs.
Name check
Partial hospitalization
A full, structured weekday of groups, therapy and medical care.
Outpatient care. You go home every afternoon.
A hospital bed, a locked unit or an overnight stay.
Detox. Withdrawal care comes first.
PHP fits people who have stopped using and whose bodies are stable, but who still need a lot of support each day. The real question is whether you’re safe to start outpatient care right now.
“PHP is for the person who is ready to stop, and needs the whole day to hold that line.”
How our admissions team explains it
PHP tends to fit when
A different first step makes sense when
You don’t need to come from residential care. Many people start from home too, once they’re no longer using and their body is stable. One call with admissions sorts out which is true for you.
Starting treatment is a lot to take in. Here’s what the first week looks like, so nothing on day one is a surprise.
Admissions asks a few screening questions, checks your benefits for free and sets a start date.
A clinician asks about your use, your health, your goals and your daily life. You sign privacy forms and sit in on a group.
You meet your therapist, your case manager and the doctor, and settle into the schedule.
You and your team write down your goals and how you’ll get there. It changes as you do.
Testing, therapy and case management keep your plan honest and up to date.

Leaving detox or residential care?
Call before your discharge date.
We line up your assessment, benefits check and start date while you’re still there. Then there’s no gap between one level of care and the next. Gaps are where people most often slip.
This level fills most of the weekday with structure. Groups run from 9am to 3pm, Monday through Friday, with one-on-one sessions woven through the week.
Coffee and breakfast are on us. Ease in before the first group.
An upbeat opening group with questions that get people talking.
Twenty minutes to stretch and step outside.
A new facilitator and a new angle on the same goals.
Provided every day, so there’s nothing to pack.
Up to two hours of honest talk about what’s going on in your life.
Head home or back to sober living. Try a new skill that evening, then talk it over the next morning.

Meals & space
Breakfast and lunch are provided every program day. See the rooms on our facilities page.
Bring on day one
Your ID and insurance card. A list of the medicines you take. A notebook for ideas from group.
This level gives you the most contact with your team of any level at Arision. Your case manager can see you up to three times a week here, compared with once a week in IOP.
Court letters, paperwork for work or school, and planning what comes next.
One-on-one therapy built around your own goals and history.
Your physical health, medicines and how your body is doing.
Mental health medicines and diagnosis, when you need them.

| PHP | IOP | OP | |
|---|---|---|---|
| ASAM level | 2.5 | 2.1 | 1 |
| Days | 5 a week | 5 a week | 1 to 5 a week |
| Hours | 9am–3pm | 9am–3pm | 9am–3pm |
| Case manager | Up to 3× a week | Weekly | Weekly |
| Therapist | 1–2× a week | 1–2× a week | Weekly |
| Typical length | About 30 days | About 30 days | About 30 days, if needed |
Medicare draws the same line: partial hospitalization means 20 or more hours a week, and intensive outpatient means 9 or more. Read more about IOP at Arision, the step after PHP, or learn who we are.
Every group and session in our PHP addiction treatment uses a method with research behind it. At this level, you get the most hours of these methods each week.
Catch the thoughts that lead to using, and practice a different response.
Skills for riding out strong emotions without making things worse.
Find and strengthen your own reasons to change.
Map your triggers and write a plan for the hard moments.
Talk honestly with peers, guided by up to three facilitators.
Private sessions, once or twice a week, that can run longer when needed.
Up to weekly, when you ask for them and give consent.
Want to know how strong the research is for each one? Our IOP page rates each method from 1 to 5, with a link to the studies. A federal guide to intensive outpatient and day treatment describes this same mix of group and individual care.
PHP includes real medical care, not just groups. You see a doctor every week and a psychiatrist whenever you need one.

Checks your physical health, sleep and appetite, and how your body is healing. Goes over your test results and any medicine you take.
Meets with you when mood, anxiety, sleep or trauma needs a closer look. Can diagnose, and start, change or stop mental health medicine. Ask for a visit any week, or your therapist or doctor can suggest one.
Bring a list of all you take. Our medical team goes over each one with you. With your written consent, we share updates with your outside doctors.
Medicine for opioid or alcohol use is called MAT. It’s welcome here when our doctors say it fits you. The National Institute on Drug Abuse says these medicines are safe and help many people. Taking one as prescribed is treatment, not a relapse.
PHP isn’t detox or a hospital, and there’s no overnight nursing. If you need care around the clock, we help you get to a higher level first.
These are examples of medicines often used along with outpatient care for addiction. We list them so you can see what has been studied. Not everyone uses one, and this isn’t a list of what Arision gives each client. For alcohol, the federal Alcohol Treatment Navigator explains the options in plain language.
Not medical advice. Seeing a medicine here doesn’t mean you should take it. Only a doctor who knows your health can say if one fits. Never start, stop or change a medicine on your own.
Studied for opioid use
BuprenorphineAlso known as Suboxone, ZubsolvLarge reviews show people stay in treatment longer and use fewer opioids. Source: Cochrane review, 2014
Studied for opioid use
Buprenorphine shotAlso known as Brixadi, SublocadeA large trial found it worked as well as the daily form. It’s newer, so there are fewer years of data. Source: JAMA Internal Medicine trial, 2018
Studied for opioid use
MethadoneOne of the most studied medicines in addiction care. Source: Cochrane review, 2009
Studied for opioid use
Naltrexone shotAlso known as VivitrolWorked about as well as buprenorphine once started, but starting was harder for many people. Source: Lancet trial, 2018
Studied for alcohol use
NaltrexoneAlso known as Revia, VivitrolMany trials show fewer heavy drinking days. The effect is modest. Source: Cochrane review, 2010
Studied for alcohol use
AcamprosateAlso known as CampralMany trials show more days without drinking. The effect is modest. Source: Cochrane review, 2010
Studied for alcohol use
DisulfiramAlso known as AntabuseResults are mixed. It mostly helps when someone supervises each dose. Source: Meta-analysis, 2014
Studied for overdose
NaloxoneAlso known as NarcanIts power to reverse an overdose is well known. Take-home programs are linked to fewer overdose deaths. Source: Systematic review, 2016
What the research levels mean: Strong means many high-quality studies agree. Moderate means good studies with some limits or smaller effects. Limited means few studies or mixed results. Each source links to the study on PubMed.
Many people here also live with anxiety, low mood or trauma. Your therapist and psychiatrist treat both at the same time, in the same plan.
SAMHSA says it’s common to have both. It also says treating both at once works better than one at a time. Arision’s focus is addiction. When someone’s needs are only about mental health, our admissions team will suggest a program that fits better. Learn about dual diagnosis care at Arision.
Everyone in the program shares a room with people working hard to stay sober. That’s why we test every week, and why no one stays in group while they’re actively using.
Each person gives a drug and alcohol test once a week.
When staff notice signs of use, a test happens that day.
If a test comes back positive, or someone shows signs of use or withdrawal, we suggest detox. We help set it up.
When that review confirms active use and addiction, the person leaves the program. Our team still helps them reach detox or a higher level of care.
Emergencies: an overdose, a seizure or talk of self-harm means our staff call 911 or bring in crisis care at once. The 988 line is open to anyone, day or night.
Many clients live in sober living during treatment, so most evenings aren’t spent with family. If your loved one lives at home or close by, you’ll likely see them most evenings. Either way, family sessions are available up to weekly, once your loved one asks for them and signs consent.

What we can share
Federal privacy rules protect addiction records. With your loved one’s signed consent, we can tell you how they’re doing.
How to help at home
Keep evenings calm and predictable. CRAFT teaches families to notice sober time and talk at quiet moments.
Arision works with PPO plans that have out-of-network benefits. Your share is what your plan sets, like a copay, and we tell you that number before you start.
PPO plans our clients have used
We’re out-of-network with every one of them. Your exact policy decides what’s covered, so the benefits check comes first. Insurer names are trademarks of their owners.
Before you start
Many plans approve this care ahead of time. We check your benefits for free and send that approval request for you, so you know where you stand on day one.
We can’t accept
Medicare, Medi-Cal or HMO plans. On Medi-Cal, call LA County’s helpline any hour at (844) 804-7500. With no insurance, try FindTreatment.gov.
Under the federal parity law, most plans must cover addiction care about as well as other health care. Your own policy still decides the details.
When you and your team agree you’re steadier, you step down to IOP. The schedule stays the same. What changes is how much support you need from us. When the program ends, aftercare keeps you connected.
Full days, the most contact with your team.
Same 9-to-3 days. Fewer one-on-one appointments, more independence.
Between one and five days, built around your job or classes.
Your written plan, check-ins, alumni support and local meetings.
What aftercare includes
Before you finish, you and your therapist write down your next steps. That means your visits, your meetings and the people to call.
After you finish, our team checks in with you every week for the first month, then once a month after that.
Arision’s alumni group keeps you connected with people who know the program.
AA, NA or SMART Recovery meetings near home add support any day of the week.
Stepping down slowly keeps support in place while life fills back in. A large review of continuing-care studies found that continuing care after a first phase of treatment helps, and longer, more active care tends to help more. The National Institute on Drug Abuse adds that most people need at least three months in treatment. So at Arision, the three steps together usually span around three months. Read about our IOP and aftercare and alumni support.
Real questions about partial hospitalization, from search results and from calls to our team. Pick a topic and the page jumps there.
Understanding PHP
A partial hospitalization program (PHP) is full-day outpatient treatment, and you sleep at home each night. It’s the most structured kind of outpatient care. Days are filled with group therapy, one-on-one sessions and medical care. The ASAM Criteria calls it Level 2.5. At Arision, it meets 9am to 3pm, Monday through Friday, in Warner Center. Every Arision client starts here.
No. Despite the name, you don’t stay overnight. Medicare’s rules describe it as a program with less than 24-hour care, outside any inpatient or live-in setting. It’s offered in place of a hospital stay for people who don’t need a bed at night. You come in for the day and go home each afternoon.
PHP gives more support each week than IOP. At Arision, both meet 9am to 3pm on weekdays. Your case manager sees you up to three times a week. In IOP, it’s once a week. Medicare defines PHP as 20 or more hours a week and IOP as 9 or more. Most people move from PHP to IOP after about 30 days.
PHP is ASAM Level 2.5. ASAM’s 2023 edition calls it high-intensity outpatient care. It sits above intensive outpatient care (Level 2.1) and below live-in residential care. ASAM, the American Society of Addiction Medicine, publishes the criteria doctors and insurers use to match people to the right level. Your level can move up or down as your needs change.
PHP stands for partial hospitalization program. In addiction care, it means a full-day treatment program that you attend on weekdays, with no overnight stay. It’s also called day treatment. At Arision, the PHP program runs 9am to 3pm, Monday through Friday.
They’re very close, and many people use the names the same way. Both mean structured care during the day, with no overnight stay. A federal treatment guide groups day treatment and partial hospitalization at the same general level of care. Insurers sometimes use one name or the other on a plan.
In residential treatment, you live at the program around the clock. In partial hospitalization, you don’t stay overnight. Residential care fits people who need support day and night, often right after detox. PHP fits people whose bodies are stable and who are ready to spend evenings outside the program. Many people step from residential care into PHP.
Research suggests they help many people, though results vary and no program can promise an outcome. A review of intensive outpatient and day programs found results similar to inpatient care for many people who don’t need 24-hour care. Staying in care longer also matters. Most people need at least three months of treatment, which is why this level leads into IOP and OP.
For you
Adults 18 and older who have stopped using and are medically stable, but still need daily support. You might be leaving detox or a live-in program. Or weekly therapy may not have been enough. People in active addiction or withdrawal need detox first. Our admissions team checks this on the first call, along with your insurance benefits.
At Arision, the program runs from 9am to 3pm, Monday through Friday. That’s about six hours a day. The day includes two morning groups, a break, lunch and an afternoon process group. Your one-on-one sessions with your therapist and case manager are scheduled through the week.
PHP at Arision usually lasts about 30 days. It’s the first step of a path that often runs about 90 days, from PHP to IOP to outpatient care. Your progress decides when you step down, not the calendar. If your insurer reviews how long care should last, we handle that with you.
No. You leave around 3pm and sleep at home or in sober living. This is outpatient care, so you come in for the day only. That lets you practice new skills in real life each evening, then talk it through with your group the next morning.
Only if you’re in active addiction or could go into withdrawal. Arision doesn’t provide detox. If you drink or use regularly right now, detox comes first, because stopping alcohol or benzodiazepines suddenly can be dangerous. Our admissions team screens for this on the first call and helps you find a licensed detox if you need one.
Yes, as long as you’ve stopped using and your body is stable. Many people come straight from home. Others arrive after detox or a live-in program. Admissions will ask a few questions to make sure outpatient care is safe for you right now.
No. Arision’s PHP is in person only, in Warner Center. Being in the room matters at this level. The groups, the daily structure and seeing your team face to face are a big part of how this level works.
Medication & safety
Yes, when our doctors say it fits you. Medicine for opioid and alcohol use is welcome here. That includes buprenorphine such as Suboxone, the Brixadi shot, naltrexone and acamprosate. We’ll also look over your mental health prescriptions together.
Yes. Everyone in the program is tested every week, and the tests include alcohol. We also test the same day if staff see signs of use. Testing keeps the room safe and sober for everyone, and it gives your team honest information to plan your care.
We’ll recommend detox and look closely at what happened. Signs of intoxication or withdrawal mean detox comes first, and our team arranges it with you. Group stays a sober room, so nobody attends while using. When the review confirms active use and addiction, you’ll leave the program. You won’t be left on your own, though. We still help you get to detox or a higher level of care.
Cost & privacy
Many PPO plans with out-of-network benefits cover PHP. Arision isn’t in-network with any insurer and bills your plan directly. Your share is your plan’s cost-sharing, like a copay. Many plans approve this care before it starts, and we send that request for you. Call or send the form for a free benefits check.
No. Arision can’t accept Medicare, Medi-Cal or HMO plans. If you have Medi-Cal, LA County’s helpline at 844-804-7500 connects you to covered care, any hour. No insurance at all? Search FindTreatment.gov, or call SAMHSA’s free helpline at 1-800-662-4357 for programs that cost little or nothing.
No. You can call us yourself. A doctor, therapist or other program can refer you, but you don’t need one. Our admissions team does the screening, checks your benefits and sets your start date.
Yes. With your written consent, your case manager can write letters about your attendance and progress. These can go to a court, a probation officer or your attorney. Federal privacy law means we share only what you agree to in writing. Our case managers help with paperwork, but they can’t give legal advice.
Not from us. Your records fall under HIPAA and the stricter 42 CFR Part 2. We share nothing with an employer unless you sign a form saying we can. If you need leave paperwork, you decide what’s shared, and your case manager helps you keep it to the minimum.
For families
No. There’s no overnight stay. The program day ends around 3pm. Many clients then go back to a sober living home, so they may not come home to you each night. If your loved one lives with you or nearby, you’ll likely see them most evenings. Either way, family sessions and phone calls help you stay connected.
Only with your loved one’s written consent. Federal privacy law is strict about addiction records. Without consent, we can’t even confirm someone is a client. Once they sign, we can share updates you both agree to.
Call admissions, and we’ll talk through safe options together. This is outpatient care, so a place to sleep each night matters. 211 LA also lists housing help across Los Angeles County.
Adults in California generally can’t be made to attend outpatient treatment. What helps is knowing the options, waiting for a quiet moment to talk, and letting them face the results of their use. Feel free to call us yourself first, even before they say yes. Call 911 if they’re in danger, or call or text 988 if suicide is a worry.
After PHP
Most people step down to IOP, which keeps the same 9-to-3 schedule with less one-on-one time. After about 30 days of IOP, some people continue in outpatient care one to five days a week. Near the end, you and your therapist put your next steps in writing, including alumni support. Once you finish, our team checks in every week for the first month, then monthly.
Yes. Arision runs a partial hospitalization program in Woodland Hills, in the west San Fernando Valley part of Los Angeles. We’re in Warner Center, near the 101. Clients come from across the Valley and nearby cities. Call admissions to check your benefits and set a start date.
Arision’s PHP is in Warner Center, at 21600 Oxnard Street, Suite 270, in Woodland Hills. Parking and freeway access are easy from the 101. Adults come from all over the west Valley, including Tarzana, Calabasas, West Hills, Canoga Park, Encino, Agoura Hills and Thousand Oaks.
Call about yourself or about someone you love. The call is free, private and comes with no pressure to decide anything.
Admissions · day or night
(747) 320-9575In an emergency, call 911.
In a mental health crisis, call or text 988 any time.
This page shares general information, not medical advice.