

I’m a dual-certified Family Nurse Practitioner (FNP-BC) and Psychiatric Mental Health Nurse Practitioner (PMHNP-BC), currently completing my Doctor of Nursing Practice. I’ve worked in primary care, behavioral health, and community medicine, giving me a strong whole-person approach to mental health.
I am a board-certified Psychiatric Mental Health Nurse Practitioner at Heartland Mental Health Services, holding a Master of Science in Nursing from Walden University (2024). With over 15 years of registered nursing experience in Arizona — spanning inpatient and outpatient psychiatry, community mental health, crisis stabilization, substance-use treatment, and long-term care — I bring a compassionate, client-centered approach to every encounter. I specialize in the treatment of depression, anxiety, bipolar disorder, trauma, psychosis, substance use disorders, and chronic mental illness, providing comprehensive psychiatric assessments and medication management grounded in individualized, evidence-based, collaborative care. I am committed to fostering a supportive, stigma-free environment that empowers clients to take an active role in their healing and long-term wellness.
I am a board-certified psychiatric mental health nurse practitioner dedicated to helping individuals achieve emotional wellness through personalized care. I do provide comprehensive psychiatric evaluations and medication management tailored to each patient's needs. My clinical focus includes anxiety disorders, mood disorders, depression, panic attacks, stress, trauma, PTSD, insomnia, emotional regulation, ADHD, and bipolar disorder. I apply a collaborative and culturally sensitive approach, while ensuring patients feel comfortable and actively involved in their treatment. I see patients throughout Texas, Arizona; and New Mexico via telehealth, telepsychiatry, and online psychiatrist services.
I graduated from Texas Woman's University with a BSN; University of Calgary, Canada, MSN, Grand Canyon University AGACNP; and Walden University, PMHNP. Altogether, I have been in the healthcare profession for 18 years. I have worked in hospitals, long-term care, nursing homes, and home health services. All these experiences inform my care delivery to patients in any setting. I have cared for pediatric, young adult, adult, and geriatric populations. Also, I have experience as a hospitalist and in internal medicine with oncology patients.
My name is Dianne Fontaine, MSN, APRN, and I'm a Licensed Psychiatric Mental Health Nurse Practitioner, Board Certified (PMHNP-BC) by the American Nurses Credentialing Center (ANCC). I obtained my Master’s Degree from Walden University and has undergone advanced clinical training, equipping me to assess, diagnose, and treat a spectrum of psychiatric illnesses, as well as provide psychotherapy.
Dr. Paul Okoronkwo is a board-certified Psychiatric Mental Health Nurse Practitioner with 5 years of experience in treating adolescents and adults with depression, anxiety, panic disorder, ADHD, insomnia, and mood disorders. He has worked in multiple mental health hospitals and healthcare facilities since 2015. He received his master's and doctoral degrees from Walden University.
Hello, my name is Reshma, and I’m a Psychiatric Mental Health Nurse Practitioner.
I work with individuals to support their mental health, emotional well-being, and overall quality of life.
My approach is collaborative, compassionate, and tailored to your unique needs.
We’ll work together on therapy, medications if appropriate, and practical coping strategies.
My goal is to create a safe, respectful space where you feel heard and supported.
I provide compassionate, comprehensive mental health care tailored to teens and families navigating complex mental health challenges. As a psychiatric-mental health nurse practitioner (PMHNP), I specialize in treating depression, anxiety, OCD, mood disorders, and ADHD through integrative psychiatry and medication management.


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