Saint John Hospital – Senior Behavioral Health Center is an substance abuse treatment center that provides outpatient treatment for men and women from 18+ years of age. As part of their special programs, Saint John Hospital – Senior Behavioral Health Center To help patients achieve sobriety, Saint John Hospital – Senior Behavioral Health Center provides intake assessments. Afterward, patients receive during treatment. Saint John Hospital – Senior Behavioral Health Center is located in Leavenworth, Kansas, providing treatment for people in Leavenworth County, accepting cash or self-payment.