What Is a Partial Hospitalization Program (PHP)?

A Partial Hospitalization Program (PHP) — also called Day Treatment — is a structured addiction treatment program that provides hospital-level intensity of care without requiring overnight stay. Patients attend programming for 5–7 hours per day, typically 5 days per week, for a total of 30 or more clinical hours per week, then return home or to a sober living residence each evening.

PHP occupies ASAM Level 2.5 in the nationally recognized care continuum — the most intensive outpatient level of care. It is more intensive than Intensive Outpatient (IOP) and used as either a step-down from inpatient rehab or as a primary treatment option for patients with moderate-to-severe addiction who have stable living situations.

Research comparing PHP outcomes to inpatient treatment for appropriately selected patients consistently shows equivalent 12-month sobriety rates — at significantly lower cost and with greater preservation of employment, family connections, and daily functioning. The key phrase is "appropriately selected" — PHP is not appropriate for all patients, and clinical assessment is essential to determine the right level of care.

PHP vs. IOP vs. Inpatient: Understanding the Continuum

The ASAM Criteria establish a continuum of addiction treatment levels based on clinical need. PHP sits between inpatient and IOP:

Who Is PHP Appropriate For?

PHP is appropriate for patients who need more structure and clinical support than IOP can provide, but who do not require 24-hour residential supervision. Clinically, PHP is most appropriate for:

• Patients stepping down from inpatient rehab who still require intensive support
• Moderate-to-severe addiction with stable housing and sober support at home
• Patients who require daily clinical monitoring but not overnight supervision
• Co-occurring mental health conditions that are stabilized but require intensive ongoing management
• Patients with strong external motivation (family, employment) who benefit from returning home daily
• People who have tried outpatient treatment without success and need a more intensive structure
• Patients whose substance use has been stabilized through detox but who are at high relapse risk

What Does a Typical PHP Day Look Like?

PHP programming runs approximately 5–7 hours per day, typically Monday through Friday. A sample schedule:

Core Clinical Components of PHP

Individual Therapy

Patients in PHP typically receive individual therapy sessions 2–3 times per week with a licensed therapist. Sessions use evidence-based modalities including Cognitive Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT), Motivational Interviewing (MI), and trauma-focused therapies such as EMDR. Individual sessions address the underlying psychological drivers of addiction — trauma, shame, unprocessed grief, co-occurring depression and anxiety.

Group Therapy

Group therapy is the backbone of PHP treatment — patients typically participate in 3–5 group sessions per day. Research consistently demonstrates that group therapy produces outcomes equivalent to individual therapy for substance use disorders while providing the added benefits of peer accountability, reduced isolation, and real-time social skill practice. PHP groups include process groups, CBT skills groups, relapse prevention groups, anger management, and specialized groups for trauma, grief, and co-occurring disorders.

Psychiatric Services and Medication Management

PHP programs include weekly or bi-weekly psychiatric evaluation and medication management for co-occurring mental health conditions. This is one of the key advantages of PHP over standard outpatient treatment — the frequency and intensity of psychiatric monitoring allows for more responsive medication adjustments. Medication-Assisted Treatment (MAT) for opioid or alcohol use disorder is initiated or continued and monitored closely in PHP.

Family Therapy

Most PHP programs include scheduled family therapy sessions and family education components. Family involvement during addiction treatment is associated with significantly better outcomes — the Betty Ford Institute and others have published research demonstrating that family participation improves both treatment retention and 12-month sobriety rates. Family sessions address communication patterns, codependency, boundary-setting, and the role of the family system in supporting long-term recovery.

Case Management and Discharge Planning

PHP includes dedicated case management services — a licensed case manager coordinates housing, employment support, legal issues, childcare, and other barriers to treatment. Discharge planning begins on day one: identifying the appropriate step-down to IOP, arranging outpatient psychiatric follow-up, connecting with community recovery support (AA, NA, SMART Recovery), and establishing a relapse prevention plan specific to each patient's triggers and high-risk situations.

PHP for Dual Diagnosis (Co-Occurring Disorders)

PHP is particularly well-suited for people with co-occurring addiction and mental health disorders — often called dual diagnosis. The intensity of clinical contact in PHP allows treatment teams to monitor both conditions closely, adjust medications responsively, and provide the frequency of therapeutic contact needed to stabilize both disorders simultaneously.

According to SAMHSA, more than 50% of people with substance use disorder have at least one co-occurring mental health condition. The most common include major depression, anxiety disorders, PTSD, bipolar disorder, and ADHD. Treating both conditions simultaneously — as PHP is designed to do — produces significantly better outcomes than sequential treatment or treating only the addiction.

How Long Does PHP Last?

Most patients complete PHP in 4–8 weeks, though duration varies based on clinical progress and insurance authorization. The step-down pathway typically looks like:

• Medical Detox (3–10 days) → Inpatient Rehab (28–90 days) → PHP (4–8 weeks) → IOP (8–12 weeks) → Outpatient / Aftercare
• Or: PHP as primary treatment (4–8 weeks) → IOP (8–12 weeks) → Outpatient / Aftercare

Clinical progress — not a predetermined schedule — should determine when a patient steps down. Premature step-down before a patient is clinically stable significantly increases relapse risk.

Frequently Asked Questions About PHP