Addiction therapists & psychiatrists in North Miami Beach, FL

Hi, I’m Casey. As a board-certified Psychiatric-Mental Health Nurse Practitioner (PMHNP-BC) and the founder of Nexus Psychiatric Services, I built this practice for people seeking exceptional clinical care from an approachable, down-to-earth provider.

My professional foundation comes from my years of experience in the acute inpatient psychiatric setting. Navigating these high-intensity settings taught me to bring calming stability to those who are struggling, and I carry that into every outpatient telehealth visit. Today, my practice supports adults, adolescents, and children ages 6 and up through the everyday challenges that arrive when living with diagnoses such as anxiety, depression, and mood disorders. Beyond general psychiatric care, I offer a deep clinical commitment to neurodivergent individuals and those suffering from identity issues. Whether you are feeling exhausted by life, exploring your identity, or trying to help your child thrive, you are welcome to show up to our sessions exactly as you are.

I am Kathleen Muller, PMHNP-BC, a Psychiatric Mental Health Nurse Practitioner I have experience in providing compassionate and comprehensive mental health care to adults. I hold a Master of Science in Nursing (MSN) from Walden University. Over the years, I've dedicated myself to helping individuals navigate various mental health challenges and life transitions, always focusing on creating a trusting, supportive, and effective therapeutic relationship. Together, I'd like to help you set mental health goals at a pace you're comfortable with.

I have a heart for walking with people who are looking for someone to listen and care about their unique circumstances. I work with both couples and individuals; some specializations include marital counseling, grief, addiction, anxiety, depression, spiritual/existential discernment, trauma, suicidal ideation, family dysfunction, and career counseling.

Dr. Zaidi is Triple Board Certified in Psychiatry/Neurology, Child & Adolescent Psychiatry and Addiction Medicine. He has encompassed more than thirty years of extensive and diverse experience in the field of Child, Adolescent & Family Psychiatry. Dr. Zaidi was responsible for the management of a Monmouth Medical Center Children’s Crisis Intervention Service staff and operations; establishing patient services for adolescents, including day and overnight hospitalization; and supervision of multidisciplinary staff in various settings. Dr. Zaidi served as a Clinical Assistant Professor within the Department of Psychiatry at the Drexel School of Medicine. As a Site Director for Psychiatry, he provided supervision and training of medical students and pediatric residents on rotation at Monmouth Medical Center for Drexel School of Medicine and the Physicians Assistants Program from UMDNJ and Seton Hall. Dr. Zaidi has seen children, adolescents, and adults in private practice for over a decade. Dr. Zaidi is certified by the Board of Education to conduct psychiatric evaluations for school districts for Monmouth and surrounding counties.

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I’m a board-certified Psychiatric Mental Health Nurse Practitioner dedicated to making high-quality mental health care accessible to everyone, especially individuals in underserved and rural communities. Throughout my career, I’ve had the privilege of caring for children, adolescents, adults, and older adults in homes, assisted living facilities, group homes, and through telehealth.

I believe mental health care should be compassionate, collaborative, and free of judgment. My goal is to create a space where you feel heard, respected, and comfortable being yourself. Whether you’re struggling with anxiety, depression, ADHD, bipolar disorder, trauma, grief, or another mental health concern, we’ll work together to build a treatment plan that fits your life, not someone else’s.

I combine evidence-based medicine with a whole-person approach, recognizing that sleep, stress, relationships, physical health, and daily habits all play an important role in emotional well-being. My priority is helping you feel better while empowering you with the tools to thrive long after our appointments.

I’ve spent years sitting with people at their lowest—through addiction, crisis, and the kind of pain that can make life feel unmanageable. That work taught me something I bring into every session now: nobody is “too much,” and no story is too messy. These days, I’m more focused on slower, steadier work. Whether you’re worn down by depression, gripping through stress, or finally ready to be honest about drinking or using, I’ll meet you where you are with steadiness, honesty, and compassion. You don’t need the right words yet; we’ll figure it out together.

I want you to know that my role is to support you with compassion, respect, and evidence‐based care. I take the time to listen closely so I can understand what you’re experiencing and what matters most to you. My approach is collaborative—I believe treatment works best when we make decisions together. I’m here to provide a safe, nonjudgmental space where you can speak openly and feel heard. My goal is to help you move toward stability, confidence, and a better quality of life.

Whether you're navigating anxiety, trauma, addiction, or a major life change - you deserve support without judgment. My practice is a safe, compassionate space where you can finally say the things you've never said out loud. I've spent 20+ years walking alongside adults through their hardest seasons. As your sole therapist, I'll know your story deeply and show up consistently - with warmth, honesty, and genuine care.

My experience centers on supporting clients of all ages through a wide range of life challenges. Guided by a solution-focused perspective, I believe holistic healing is a foundational part of effective client care. I am trained in EMDR, a therapeutic modality that helps clients process trauma and other difficult life experiences that may interfere with personal growth, relationships, and mental health. I work with clients navigating anxiety, depression, trauma, stress, life transitions, emotional overwhelm, and other concerns that can make it difficult to feel grounded or move forward. I hold a master’s degree from Colorado Christian University and have received training in both play therapy and EMDR. I have also worked with clients experiencing dual diagnoses within the field of substance use disorders, which has deepened my understanding of the connection between emotional pain, coping, and healing.

I am a kind, open-minded person who genuinely values listening and understanding others. I believe that some of the most meaningful connections begin with simply feeling heard. I have an extensive background and passion for psychology, and I am endlessly fascinated by the brain, the mind, and how deeply connected they are to our emotions, behaviors, and overall well-being.

Outside of my professional life, I enjoy spending time with my family, playing with my cats, and traveling whenever I get the opportunity. I naturally enjoy helping others navigate life’s challenges, whether that involves problem-solving, relationships, emotional struggles, or finding new perspectives during difficult times. Helping people better understand themselves and move toward healthier, more fulfilling lives is something that brings me genuine purpose.

I also hold a special passion for supporting our military, veterans, and first responders. Being married to one has given me a deeper appreciation and understanding of the sacrifices made by these individuals and their families. I believe the men and women who have served and protected our country are among our nation’s greatest assets, and I feel deeply committed to helping support their mental health, resilience, and quality of life as they continue carrying burdens many others may never fully understand.