

I am compassionate, approachable, and committed to providing a safe, nonjudgmental space. I value open communication, transparency, and collaboration, and I believe treatment works best when we make decisions together. My care is evidence-based and trauma-informed, focused on understanding the whole person and supporting meaningful, sustainable mental health improvement.
Hi, I’m Gretchen, a board-certified Psychiatric-Mental Health Nurse Practitioner (PMHNP, ANCC) with a Master of Science in Nursing from Lewis University. I work with individuals, teens, and families navigating anxiety, depression, trauma/PTSD, ADHD, and substance use concerns, providing care in both English and Spanish. I bring experience from emergency departments, inpatient units, outpatient clinics, and private practice, and I strive to create a safe, judgment-free space where clients feel heard, respected, and supported. I value collaboration and flexibility, tailoring each session to your needs so you can feel empowered to make meaningful changes.
I want to warmly welcome you to the beginning of your healing journey and sincerely congratulate you on taking this courageous step toward prioritizing yourself.
My name is Cassandra Otoo-Robinson, and I’m truly honored to walk alongside you. I am committed to providing you with the highest quality of care, compassion, and respect as we navigate this path together.
Ola Omoniyi became an Illinois Certified Nurse Practitioner in 2021. She received her undergraduate degree at Valparaiso University in Indiana and her master’s degree from the University of St. Francis in Joliet. She completed her clinical rotation in mental health at Will County Behavioral Health in Joliet. Ola worked at Rush University Medical Centre for 5 years in the behavioral health unit as a Registered Nurse and 5years at other behavioral health hospitals in Chicago.
I’m a psychiatric nurse practitioner committed to compassionate, thoughtful, and evidence-based mental health care. With more than a decade of experience in psychiatry, emergency medicine, trauma, and clinical leadership, I bring a broad skill set to my work, but human connection remains at the center of my approach.
I believe every person deserves to feel heard and supported. I help individuals navigate anxiety, depression, ADHD, bipolar disorder, personality disorders, and other mental health challenges with clarity and compassion. I take time to understand your story, collaborate on your goals, and create a treatment plan that fits your life.
My diverse background, from trauma care to outpatient psychiatry and clinical education, has strengthened my commitment to high-quality, collaborative care for patients of all ages.
At Granted Mental Health Services, my mission is to provide accessible, patient-centered care that honors your experiences and supports your journey toward a healthier, more balanced life. I’m grateful for the opportunity to walk alongside you.


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