

Hi, I’m Sabina Onwonga, DNP, a dual-certified Family Nurse Practitioner (FNP) and Psychiatric Mental Health Nurse Practitioner (PMHNP). I earned my Doctor of Nursing Practice (DNP) from UMass Global University and my Master of Science in Nursing (MSN) from the University of Texas at Arlington.
I provide compassionate, evidence-based psychiatric care and specialize in treating ADHD, anxiety, depression, bipolar disorder, PTSD, and counseling support, helping clients feel heard, supported, and empowered to reach lasting stability and wellness.
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.
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.


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