The idea that the first two or three years after a psychotic episode are a "critical period" — and that intensive, integrated care during that window can change the trajectory of an illness — emerged in the 1990s and has since become one of the most important shifts in psychiatry. Early intervention services for psychosis (EIS) now operate in dozens of countries. They differ in funding, structure, and culture, but they share a common architecture. This article walks through the major models.
Early intervention services deliver intensive, multidisciplinary care during the first 2–5 years of a psychotic illness — the window during which outcomes are most malleable.
The Melbourne origin: EPPIC
The first comprehensive early intervention service was the Early Psychosis Prevention and Intervention Centre (EPPIC), founded in Melbourne in 1992 by Patrick McGorry, Henry Jackson, and colleagues. EPPIC combined youth-friendly clinic settings, low-dose medication, family work, group programmes, and supported employment. Its underlying premise — that the illness was more responsive in its early years and that early aggressive treatment changed the long-term trajectory — was novel and controversial at the time.
The associated PACE Clinic, also McGorry's, became the first dedicated CHR service. Together, EPPIC and PACE established the model that the rest of the world would adapt.
The UK: EIP teams
The UK was the first country to make early intervention a national policy. Following the Department of Health's 2001 Mental Health Policy Implementation Guide and the work of the IRIS network, every Mental Health Trust in England was required to establish an Early Intervention in Psychosis (EIP) team. NHS EIP teams typically:
- Accept referrals for people aged 14–65 with a first episode of psychosis
- Offer 3 years of care with a multidisciplinary team
- Include access to NICE-recommended interventions: CBT for psychosis, family intervention, supported employment, and physical health monitoring
- Are subject to the EIP Access and Waiting Time Standard — a binding NHS commitment that 60% of people experiencing first-episode psychosis should receive a NICE-concordant package within two weeks of referral
The NICE psychosis guideline (CG178) codifies what EIP services should deliver and remains one of the most influential clinical guidelines in psychiatry.
Denmark: OPUS
The Danish OPUS programme is one of the most rigorously studied early intervention services in the world. Started in Copenhagen in 1998 by Merete Nordentoft and colleagues, OPUS pairs intensive 2-year integrated care (including assertive community treatment, family work, social skills training, and medication) with high-quality follow-up data.
Long-term OPUS results, published in the British Journal of Psychiatry and elsewhere, showed substantial early benefits over usual care, with some convergence between groups by year 5 — an important finding that shaped subsequent thinking about whether 2 years of intensive care is enough.
The Lambeth Early Onset (LEO) team
South London's LEO team, established in 2000 by Tom Craig and colleagues, was the first UK service to be evaluated in a randomised controlled trial against standard care. Results published in the BMJ, 2004 showed lower relapse and readmission rates and better engagement in the LEO group. LEO became one of the templates for the national EIP rollout.
Canada: PEPP and similar networks
Canada has developed early intervention programmes through provincial health systems, with research leadership from the Prevention and Early intervention Program for Psychoses (PEPP) at McGill, Western University, and other academic centres. The Canadian Consortium for Early Intervention in Psychosis (CCEIP) coordinates programmes across provinces.
The US: RAISE and CSC
The US arrived at early intervention later than many countries, in part because of fragmented funding. But the NIMH-funded RAISE trial, published from 2015 onward, provided the evidence base for federal action. SAMHSA Mental Health Block Grant set-asides now fund Coordinated Specialty Care programmes in every state.
Hong Kong, Singapore, and the EASY programme
Hong Kong's Early Assessment Service for Young people with psychosis (EASY) launched in 2001. It pairs an early intervention service with an aggressive public awareness campaign aimed at reducing duration of untreated psychosis. Published outcomes (Eric Chen and colleagues) include reduced suicide rates, lower hospitalisation, and shorter DUP at the population level.
Singapore's EPIP and other Asian programmes have built on the EASY model.
Norway's TIPS study
The TIPS (Early Treatment and Identification of Psychosis) study in Norway and Denmark, led by Tor Larsen and Thomas McGlashan, is one of the cleanest demonstrations of public-health-style DUP reduction. By combining intensive community education campaigns with a dedicated early detection team, TIPS sites had median DUP of about 5 weeks compared to 16 weeks at comparison sites. Patients in early-detection areas had significantly better long-term outcomes (see the TIPS five-year outcomes paper, McGlashan et al.).
Common architecture across models
Despite different national systems, almost all successful EIS programmes share the same core elements:
- Youth-friendly setting and culture
- Multidisciplinary team with low caseloads
- Care duration of 2–5 years
- Low-dose, individualised medication
- CBT for psychosis or related psychotherapy
- Family psychoeducation
- Supported employment and education
- Physical health monitoring
- Public awareness or community engagement to reduce DUP
Where the field is heading
Several international initiatives are pushing the work forward:
- Extending duration. The OPUS-II trial tested whether 5 years of intensive care produces durably better outcomes than 2.
- Headspace and youth mental health platforms. McGorry's group has championed broader youth mental health centres serving early psychosis alongside other youth concerns.
- Digital and remote care. Apps, wearables, and digital phenotyping are increasingly integrated.
- Equity. Most early-intervention research has been done in well-resourced urban centres. Adapting models for low- and middle-income countries is a major focus of WHO-affiliated work.
The big picture
Thirty years after EPPIC opened in Melbourne, early intervention for psychosis is the global standard of care. The model is not perfect, the evidence is not unanimous, and the funding is uneven — but the international convergence on a shared architecture for first-episode care is one of the clearer success stories of modern psychiatry. For families navigating a first episode today, the practical advice is the same in almost any country: ask for the early intervention service. They exist for exactly this moment.
This article is for educational purposes only and is not medical advice, diagnosis, or treatment. Always consult a qualified mental health professional. If you or someone you know is in crisis, call or text 988 in the US, or your local emergency number.