Four-Day Treatment to Break Free From OCD

The Bergen 4-Day Treatment (B4DT) is an intensive therapeutic approach for obsessive-compulsive disorder (OCD) that compresses standard once-a-week therapy sessions into four consecutive days of treatment. This concentrated format is designed to help patients reclaim their lives from OCD symptoms through a rigorous application of exposure and response prevention (ERP) therapy.

The treatment program consists of three primary components: psychoeducation, exposure sessions, and relapse prevention. By condensing the timeline, the B4DT aims to provide a high-intensity intervention that addresses the grip of the disorder more rapidly than traditional weekly models.

Treatment Structure and Delivery

B4DT is described as an individual treatment delivered within a group setting. The program is typically administered simultaneously to groups of three to six patients, all supported by an equal number of clinicians.

The model was developed in Norway through the collaboration of researchers and clinicians, including Gerd Kvale, PhD, Bjarne Hansen, PhD, and Thröstur Björgvinsson, PhD, ABPP. The development of the concentrated approach began after Gerd Kvale established an evidence-based outpatient OCD clinic at Haukeland University Hospital during a sabbatical starting in 2009.

Further expansion of OCD treatment infrastructure occurred when Bjarne Hansen, who headed the inpatient OCD clinic at St. Olav’s Hospital in Trondheim, worked with the Norwegian OCD Foundation to suggest the establishment of 30 OCD treatment teams across Norway. Kvale and Hansen eventually joined forces at the Bergen clinic to optimize the dissemination and success rates of these concentrated treatments.

Global Implementation and Patient Outcomes

The Bergen 4-Day Treatment has seen extensive use in its home country, with more than 16,000 patients completing the program in Norway. Its reach has since expanded internationally.

As of early 2026, over 1,000 patients have completed the B4DT in 12 other countries, including:

• New Zealand
• United States
• Australia
• Singapore
• Germany
• Denmark
• Sweden
• Finland
• Iceland
• Brazil
• Argentina
• Ecuador

Data regarding the effectiveness of the treatment indicates that 90% of patients showed significant improvement following the therapy. Long-term outcomes also suggest durability; a four-year follow-up study conducted in Norway found that approximately 70% of patients maintained their gains four years after completing the treatment.

The program is reported to be equally effective for adolescents and children as it is for adults. Erik Olsen, a cardiologist and former patient who underwent the treatment in 2014, stated, I’m a doctor and I have suffered from OCD since I was a kid. Four days with the OCD team in 2014 changed my life.

Availability in the United States

In the United States, the Bergen 4-Day Treatment is currently offered at a single clinic in Los Angeles. This facility is the only clinic in the U.S. Trained to deliver the B4DT model to both adults and adolescents.

To increase the availability of the treatment, the Los Angeles clinic is collaborating with the original Bergen team in Norway. In partnership with the Norwegian team, they plan to offer B4DT training programs for English-speaking clinicians both in North America and internationally during 2026.

Clinical Considerations and Limitations

Despite the reported success rates, clinicians emphasize that the B4DT is still the subject of ongoing research. Some experts caution that the procedures have not been concretely proven to reduce OCD symptoms in all cases.

While there is evidence to suggest that they could potentially be helpful in reducing OCD symptoms, they are not concretely proven to do so. These should be utilized as a last resort when all of the evidence-based treatment methods for OCD have already been accessed.

Gerd Kvale, PhD, Bjarne Hansen, PhD, and Thröstur Björgvinsson, PhD, ABPP