Gwen Duffield, Psychiatric Nurse Practitioner works in the South Portland, ME office at LifeStance. Areas of Expertise: Alcohol and Drug Use Issues, Anxiety, Depression, Obsessive Compulsive Disorder (OCD), Pain Management, Postpartum Depression/Anxiety, PTSD/Trauma, Women's Issues. Ages seen: 22-26, 27-40, 41-64. Take the first step towards improved mental health. Call or book online today.