

I am Mary Nganga, a PMHNP-BC in state of Texas. I have more than 12 years of experience in mental health. I graduated with Bachelor in Nursing from University of Texas Arlington, and Masters in Nursing from Texas States University, San Marcos. My free time, I enjoy spending time my family, pet (Ruffy), and gardening.
Healing isn't linear and I understand that deeply, both professionally and personally. As a dual -certified Family and Psychiatric Nurse Practitioner, and an attorney, I bring a unique, comprehensive perspective to care. But more than titles, I bring lived experience.
I know grief intimately. The pain I carried afterwards was unexplainable. It didn't fit into a neat diagnosis or timeline. That experience shaped not only how I show up for others but why I do my work.
Whether you are navigating the aftermath of a death, a medical diagnosis, a relationship rupture, or job loss, I offer a safe, grounded and trauma focused space. I help clients process complex emotions, rebuild self-trust, and gently move toward healing, at your own pace.
If you're carrying something heavy, you don't have to carry it alone. I'd be honored to walk with you.
I know what it’s like to want change and feel unsure where to begin. That’s why I created Oh Shift-a space to pause, breathe, and start again. As a dual-certified Nurse Practitioner with over 10 years of experience, I bring clinical expertise grounded in genuine compassion. I don’t believe you’re broken, I believe you’re becoming. Your story matters, and this work is about helping you shift into the next version of yourself with clarity, confidence, and intention.
A sound state of mind is a starting point for greater achievement. Dr. Rowan Teboh supports her patients to take off from where they are to where they need to be mentally, and function again with full potential. Health is our greatest wealth. So, let’s start with a sound state of mind. Board certified by Texas Board of Nursing as a PMHNP-BC. Holds an MSN and Ph.D. in Nursing. Treatment focus: Depression, Bipolar, Anxiety, PTSD, OCD, ADHD(Non-Stimulant treatment only) & Alcohol detox follow-up.
Brandy Cooks is a dedicated and compassionate Family Nurse Practitioner (FNP) and Psychiatric Mental Health Nurse Practitioner (PMHNP) with a deep commitment to providing holistic, patient-centered care. With a unique blend of experience in both education and healthcare, Brandy is passionate about empowering individuals to take charge of their well-being and achieve their personal health goals.


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