Mental Health Care System · Continuum
Partial Hospitalization (PHP)
Hospital-level intensity during the day, more hours than IOP, and home at night when that’s safe. Some people call it a “day hospital.”
In short
- Most adult PHPs run 5 days a week, averaging 5–6 hours a day.
- A typical stay is 4 to 6 weeks, often followed by 2–4 weeks of IOP. That’s common practice, not a fixed rule; some programs are much shorter.
- Medicare requires a need for at least 20 hours a week. ASAM calls this Level 2.5; LOCUS Level 4.
- Often a step down from the hospital, or a step up from IOP.
How long PHP usually runs
Checked against published sources.
Where those numbers come from
A 2022 clinical review in Current Psychiatry: most adult PHPs run 5 days a week, averaging 5–6 hours a day, and “while not evidence-based, the typical duration of PHP treatment is 4 to 6 weeks, followed by an additional 2 to 4 weeks of IOP” (Madakasira, 2022). Medicare covers PHP for people who need at least 20 hours of services a week (42 CFR 410.43).
Real stays vary a lot
A CMS-funded study of Medicare PHPs found average stays of about 2–4 weeks in hospital-based programs and 3–4 weeks in community mental health centers, with individual programs ranging from 8 days to 9 months (Leung et al., 2010). Some short-term “acute” PHPs work in days: one program of 2,000 patients averaged about 5 days (J Psychiatr Pract, 2017).
So ask the program you’re considering: “How long do people usually stay here, and how do you decide?”
What it typically looks like
What happens there
A full treatment day with a team: psychiatry, nursing, group therapy, skills groups, individual sessions, family sessions if you want them, and discharge planning from day one.
Who it’s for
People who need daily structure and close monitoring but can be safe overnight outside a hospital.
Where it fits
In ASAM’s 4th edition, what used to be called partial hospitalization is Level 2.5, high-intensity outpatient, at 20+ hours a week (WA HCA). LOCUS places partial hospitalization at Level 4, medically monitored non-residential services (Flaum, 2024).
A typical week
Five days, home every night.
What a week can look like
Switch levels, then tap any block.
An example week; programs vary in days, hours, groups and evening options.
Hours a week
PHP starts at 20 hours.
Hours a week → level of care
Drag the slider, or tap a preset, to see which level matches that much treatment time.
Hour bands follow The ASAM Criteria, 4th edition (Level 1.5 under 9 h, 2.1 at 9–19 h, 2.5 at 20+ h) and Medicare’s minimums for IOP (9 h) and PHP (20 h). Hours describe intensity only. Real decisions weigh safety and need, not the clock.
What it can feel like
“It’s like a full-time job.”
For a few weeks, it is. That intensity is the point: lots of practice, close support, and quick medication adjustments.
Coming home each night
Evenings are where you try out what you learned. Tell the team what’s hard at home; that’s part of the work.
How people move between levels
Signs it may be time to step up
Safety at night is getting harder, or you can’t stay stable even with daily support. The team may talk about inpatient or residential care.
Signs you may be ready to step down
Days feel steadier and you can handle more on your own. A common next step is IOP, then outpatient.
PHP on the ladder
Pick a story, then tap Next or Play. Tap any level to see when people move to it or away from it.
Illustrative paths, not rules. People skip levels, repeat them, or never need more than outpatient care. Moves are decided with your care team, and the goal is the least intensive level that keeps you safe and moving forward.
Access notes
PHP is often closely managed by insurers through medical-necessity reviews. Ask the admissions team to check your benefits and explain how they decide when you’re ready to step down.
To look for programs, try FindTreatment.gov or call the SAMHSA helpline at 800-662-4357. Coverage varies; this site can’t predict what an insurer will approve.
Sources
All sources, linked7 references⌄
- Madakasira, S. (2022). Psychiatric partial hospitalization programs: What you need to know. Current Psychiatry, 21(2), 28–32. doi.org/10.12788/cp.0216
- 42 CFR § 410.43. Partial hospitalization services (Medicare). www.ecfr.gov/current/title-42/chapter-IV/subchapter-B/part-410/subpart-B/section-410.43
- Leung et al. (2010). Medicare partial hospitalization program study, report for CMS. www.cms.gov/research-statistics-data-and-systems/statistics-trends-and-reports/reports/downloads/Leung_PHP_PPS_2010.pdf
- Acute partial hospitalization outcomes, N = 2,000. J Psychiatr Pract (2017), 23(6). doi.org/10.1097/PRA.0000000000000271
- Washington State Health Care Authority (2026). ASAM Fourth Edition Transition Guidebook. www.hca.wa.gov/assets/billers-and-providers/asam-fourth-edition-transition-guidebook.pdf
- Flaum, M. (2024). LOCUS presentation to the NAIC Mental Health Parity Workgroup. content.naic.org/sites/default/files/national_meeting/LOCUS Presentation.pdf
- SAMHSA. FindTreatment.gov. findtreatment.gov/