Find a psychiatrist in Illinois — covered by insurance

Diana Lankenau has a Master of Science in Nursing from Florida State University and Chamberlain University. She has a Bachelor's in nursing from University of Miami. BA in Psychology from Florida International University. She is Board Certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) and Family Nurse Practitioner (FNP-BC).

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.

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 have over 20 years of experience in healthcare. My career began as a pharmacy technician, then as an emergency room nurse, and later supervising behavioral health units at Mercy St. Louis before becoming a Psychiatric Mental Health Nurse Practitioner.This background allows me to understand mental health from both medical and psychiatric perspectives.

I’m a Psychiatric Mental Health Nurse Practitioner (PMHNP) and mom of four with a passion for helping people feel balanced, understood, and supported. I earned my nursing degree from Chamberlain University in Chicago and completed my psychiatric graduate training at the University of Kentucky. I’ve been proudly serving patients as a PMHNP since 2022.

I provide care for children (6+), teens, and adults, including parents, professionals, students, and anyone navigating life transitions or emotional challenges. My focus areas include: ADHD, anxiety & panic, depression, bipolar disorders, trauma & PTSD, emotional dysregulation and impulsivity, sleep issues, and mood and behavior concerns in children/teens.

I take a unique, integrative approach to mental health care. Whether you’re a child or adolescent navigating anxiety and ADHD or a veteran or 1st responder managing stress and emotional challenges, I tailor my care to your individual needs. I combine Eastern herbs, nutritional supplements, prescription medications, and personalized nutrition plans to create a treatment model as unique as you are.

My goal is to help you build confidence, improve focus, and achieve balance in all areas of life—whether that’s excelling at school, enhancing job performance, or strengthening relationships. Together, we’ll create a path toward emotional well-being and a healthier, more fulfilling life.

My educational journey reflects my commitment to integrative and holistic care. I earned a Bachelor’s degree in biological and nursing sciences, a Master’s in acupuncture science, and a Doctorate in chiropractic medicine from the National University of Health Sciences, where I developed a strong foundation in Eastern medicine and natural therapies. I am a double board-certified nurse practitioner specializing in family and psychiatric mental health.

I am a board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) with over a decade of experience in mental health care, supporting individuals across inpatient and outpatient settings. Through my work, I have cared for clients with a wide range of needs, including chronic and severe mental health conditions, and I understand how overwhelming it can feel to navigate symptoms while trying to maintain daily life.

My care philosophy is centered on partnership. Treatment is not about taking over your care, but about working with you to explore your symptoms, goals, and values. Together, we develop a treatment plan that feels respectful, personalized, and empowering. If you have concerns or hesitations about medication, we will discuss all available options openly and thoughtfully, moving at a pace that feels right for you.

I work with individuals experiencing depression, anxiety, trauma, ADHD, bipolar disorder, schizophrenia, OCD, and other mood and thought-related conditions. During the initial session, we focus on understanding your concerns, reviewing your history, and identifying practical steps toward improvement. Care may include psychiatric evaluation, medication management when appropriate, brief psychotherapy, education, and ongoing support.

I believe mental health care should feel supportive, clear, and collaborative—not rushed or overwhelming.

You do not have to face these challenges alone. My role is to help you reduce symptoms, strengthen coping skills, and regain balance so you can function at your best and move forward with confidence and stability.

I have worked as a mental health professional for 25 years. I also specialize in helping a person address addiction, problems with alcohol and substance abuse.