Rachel Collier, Psychologist works in the Philadelphia, PA office at LifeStance. Areas of Expertise: Alcohol and Drug Use Issues, Anxiety, Bipolar Disorder, Depression, Grief, Medical Conditions/Health Psychology, Psychosis/Schizophrenia, PTSD/Trauma, Sleep Disorders/Insomnia. Ages seen: 18-21, 22-26, 27-40, 41-64, 65+. Take the first step towards improved mental health. Call or book online today.