Gillian Reierson, Psychiatrist works in the Walnut Creek, CA office at LifeStance. Areas of Expertise: ADHD, Anxiety, Childhood Behavior Issues, Depression, Eating Disorders, Obsessive Compulsive Disorder (OCD), Postpartum Depression/Anxiety, PTSD/Trauma, School Avoidance, Sleep Disorders/Insomnia, Women's Issues. Ages seen: 06-10, 11-14, 15-17, 18-21. Take the first step towards improved mental health. Call or book online today.