Psychological interventions that require specific skills and longer-than-usual consultation times are effective in treating functional gastrointestinal disorders. These interventions qualify for reimbursement as psychosomatic therapy. Reimbursable psychosomatic therapy is defined as a treatment method for psychosomatic patients that clarifies the relationship between physical illness and psychological and social factors. The therapy aims to improve symptoms or facilitate recovery from illness by exerting a psychological influence on the patient. Therefore, when billing for psychosomatic therapy, the medical record must document the assessment of mind-body correlations, the interventions performed, and their effects.