Bipolar disorder therapists & psychiatrists in Oak Park, IL

If you're an adult navigating anxiety, depression, or relationship stress — and maybe feeling like

no one quite understands where you're coming from — you're in the right place. I've been

practicing for 15 years across community and clinical settings, working with adults and older

adults on mood, relationships, and the weight of everyday life. I'm bilingual in English and

Spanish, and having lived abroad myself, I genuinely enjoy working with people from a wide

range of cultural backgrounds. You don't have to explain your world to me — I'm here to

understand it.

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 dedicated to providing compassionate, evidence-based mental health care for individuals of all backgrounds. My goal is to create a safe space where you feel supported, understood, and empowered to take control of your mental well-being. I value collaboration, transparency, and genuine connection in the healing process.

When stress starts to build, it can affect more than just your day-to-day life. It can impact your mood, your energy, and your relationships. I work with adults and couples who are navigating anxiety, depression, workplace stress, and burnout. Many of my clients are used to juggling responsibilities, caring for others, and pushing through difficult seasons until they realize they're no longer feeling like themselves. You might feel constantly overwhelmed, mentally exhausted, or like you can’t fully “turn off” your mind. At the same time, stress can begin to show up in your relationships through miscommunication, distance, or frustration, making it harder to feel connected and supported.

With more than 30 years of experience, I've helped individuals navigate anxiety, ADHD, trauma, and life's many transitions with compassion, understanding, and practical support.

I know reaching out for help isn't always easy. My goal is to create a safe, welcoming space where you feel heard, supported, and empowered to move toward greater confidence, healing, and peace of mind.

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).

I am a dual-certified Psychiatric Mental Health Nurse Practitioner and Family Nurse Practitioner, providing whole-person care that recognizes the connection between mental, emotional, and physical health. I specialize in treating anxiety, depression, and Women's Health, and I offer a compassionate, nonjudgmental space where you can feel heard, supported, and empowered. Outside of my practice, I enjoy traveling, event decorating, and spending quality time with my family. I believe maintaining balance and personal fulfillment is an important part of overall well-being, and I bring that same perspective into the care I provide.