This contribution highlights novel developments and innovations in psychological psychotherapy for patients with obesity. It underscores the importance of an interdisciplinary approach to treatment, which incorporates not only traditional methods but also contemporary psychotherapeutic modalities such as Acceptance and Commitment Therapy (ACT). Current research suggests that assessing the effectiveness of psychotherapy should not solely rely on changes in weight, but should also consider other outcomes such as subjective quality of life and mental health. Furthermore, the role of telemedicine and blended psychotherapy is emphasized as promising approaches to enhance accessibility and effectiveness of treatment. Through a case study of a 55-year-old woman with obesity and psychiatric comorbidities, the effectiveness of a multimodal psychotherapeutic approach is demonstrated.