Addiction therapists & psychiatrists in Frankfort, IL

I am a dual board-certified psychiatric and geriatric nurse practitioner with over 25 years of healthcare experience, providing compassionate, evidence-based mental health care to young adults, adults, and older adults. I specialize in treating depression, anxiety, insomnia, bipolar disorder, schizophrenia spectrum disorders, and behavioral or psychological symptoms associated with dementia and complex medical conditions.

My experience spans hospital care, rehabilitation, hospice, and long-term care settings, giving me a deep understanding of the connection between physical and mental health. I am especially comfortable supporting individuals with multiple medical concerns or those navigating life transitions related to aging, illness, or stress.

Starting therapy can feel overwhelming, but my goal is to create a safe, collaborative, and supportive space from our very first session—whether you come as an individual or as a couple.

My client-centered, trauma-informed approach means your stories, values, and goals shape the work we do together. I help teens, adults, and couples heal from past trauma, grief, addiction, navigate anxiety and depression, and build stronger, healthier relationships.

As a bilingual therapist (English and Spanish), I’m sensitive to the cultural and relational contexts that shape who you are and how you connect with others.

For clients who desire it, I can also integrate spiritual reflection into therapy, always honoring your level of comfort.

Welcome! Join me on a journey to reclaim your sense of self, direction and empowerment. As a person who has struggled with life's hardships, I am compeled to help others in these difficult times. My credentials include; Licensed Professional Counselor (LCPC), Certified Drug and Alcohol Counselor (CADC) and an Illinois Certified Domestic Violence Professional (ICDVP).

I am a licensed clinical professional counselor with over 28 years of experience guiding individuals and families through their unique journeys toward emotional well-being. I received my Master’s of Science in Psychology from Western Illinois University in 1994 and have worked within a variety of settings with people of all ages addressing complex mental health issues.

Throughout my career, I have supported clients facing a wide range of challenges, and I am committed to creating a safe, compassionate, and non-judgmental space for healing and growth.

As a grandparent to three wonderful grandchildren, I appreciate the richness and complexity of family life at every stage. In my free time, I love to travel, explore new places, and immerse myself in different cultures. A lifelong reader, I find joy and insight in literature, and I often bring the wisdom of stories into my therapeutic practice. My passions for creativity, travel, and family help me understand the variety of experiences my clients bring, and I strive to honor each person’s individuality in my practice.

Whether you are seeking support for yourself or a loved one, I look forward to meeting you and walking alongside you on your path to greater well-being.

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.

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).