

I believe mental health care works best when it is collaborative, respectful, and personalized.
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.
My name is Tammy, and I am a board certified by the American Nurses Credentialing Center as a Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) with over 15 years of experience in mental health.
I want to meet my patients where they are and want them to feel safe and supported. I believe that outcomes are best met when there is mutual trust, respect, honesty, and patients know that they are being heard.
As one of the country’s few psychiatrists who also practices sex therapy, I can provide unique and specialized services for patients who have been marginalized and oppressed. I offer a combination of sex therapy and medication management, tailored to both your personal and medical needs. While I predominantly follow an Acceptance and Commitment Therapy (ACT) approach, I also incorporate elements of psychodynamic psychotherapy, Cognitive-Behavioral Therapy (CBT), trauma-informed therapy, and supportive therapy. I completed medical school at the Indiana University School of Medicine (2021), and completed psychiatry residency training at University of Chicago (2025).
I treat 18+ individuals, and specialize in treating individuals within any sexual minority group — including members of the LGBTQIA+, trans, gender-expansive, non-monogamous, and kink communities — plus those who participate in unconventional sexual practices. I also treat couples and individuals within various relationship structures (such as triads, polycules, or other non-monogamous relationships).
My nursing career began in 2010 when I first became a Registered Nurse. In 2017 I graduated from Maryville University in St. Louis, MO with my master’s degree in nursing and became a board-certified Family Nurse Practitioner (FNP-C) licensed in Illinois. I have been blessed to work in many facets of healthcare since and has also become a board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC). With a strong foundation in both primary care and mental health, my approach aligns overall wellness and hormone optimization with physical, mental, and lifestyle well-being.
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.