

Dr. Helder Araujo is a board-certified psychiatrist in California whose work bridges psychiatry, neuroscience, and education
Originally from Portugal, he completed medical school and began training in neurology before moving to the United States. He earned a Ph.D. in neuroscience and conducted postdoctoral research at the University of Southern California (USC). He has also taught at colleges and universities, an experience he deeply values.
Dr. Araujo completed psychiatric training to pursue his passion: helping adults in California manage their mental health challenges.
Hello, my name is Medjinn Thomas. I am a Psychiatric Mental Health Nurse Practitioner. I have specialized training and experience in treating depression, anxiety, personality disorders, and trauma. My patients tend to describe me as a light in the darkness. You will leave appointments with a clarity that the path to feeling better isn't as overwhelming as you may have initially thought.
My name is Dianne Fontaine, MSN, APRN, and I'm a Licensed Psychiatric Mental Health Nurse Practitioner, Board Certified (PMHNP-BC) by the American Nurses Credentialing Center (ANCC). I obtained my Master’s Degree from Walden University and has undergone advanced clinical training, equipping me to assess, diagnose, and treat a spectrum of psychiatric illnesses, as well as provide psychotherapy.
I believe that each person brings a unique story shaped by their life experiences, values, and cultural background. My clinical work has taken place across a variety of settings—including academic institutions, state hospitals, and community mental health clinics—which has helped me develop a flexible, respectful, and collaborative approach to care.
I am a board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) dedicated to providing compassionate, patient-centered mental health care to individuals across California. With a background in both nursing and psychiatry, I specialize in diagnosing, treating, and supporting patients with a wide range of mental health conditions, including anxiety, depression, ADHD, bipolar disorder, and more.
I know how heavy life can feel when you’re carrying pain, uncertainty, or self-doubt. But I believe, as a wise old wizard once said, “Happiness can be found even in the darkest of places, if one only remembers to turn on the light.” My role is to help you find that light again. I work with Gen Z and Millennial adults facing anxiety, depression, trauma, bipolar disorder, ADHD, and more. Through integrative, culturally responsive care, I combine evidence-based psychiatry with holistic strategies to help you feel heard, supported, and empowered to create a life that aligns with your true self.


Headway makes it easy to find support for your mental health — from finding the right provider, to understanding costs, to scheduling with ease.