Find a therapist in Melville, NY — covered by insurance

Do you notice patterns of behaviors that you are unsatisfied with? Therapy is a significant step towards working through and facing life's most difficult challenges. I have worked with adults, adolescents and children treating issues of adjustment, self-doubt, mood swings, trauma and anxiety attacks. When you approach the therapeutic process with curiosity, you can grow, heal, and thrive.

Hi, I'm Jean-Jeffrey Marcellus, DNP, PMHNP-BC, AGNP-BC, a board-certified Psychiatric Mental Health Nurse Practitioner with over 19 years of healthcare experience. I provide compassionate, evidence-based care for adults experiencing ADHD, anxiety, depression, insomnia, and substance use disorders.

I specialize in Medication-Assisted Treatment (MAT) for alcohol, opioid, benzodiazepine, kratom, and prescription medication dependence. My approach is collaborative and personalized, focusing on creating treatment plans that support each individual's goals, recovery, and overall well-being.

I offer both in-person and telehealth appointments, providing a welcoming, judgment-free environment where patients feel heard, respected, and empowered. I am committed to delivering culturally responsive care and making high-quality mental health services accessible to individuals from diverse backgrounds.

Therapy is a collaborative process, and a strong therapeutic relationship is key to meaningful progress and lasting change. My approach is grounded in a strengths-based, client-centered perspective that supports each person’s capacity for growth and self-understanding. I strive to create a supportive, compassionate, and nonjudgmental space where you can openly explore your thoughts, emotions, and experiences at a pace that feels comfortable for you. Whether you are navigating life transitions, managing stress, or seeking greater self-awareness, therapy can provide a space for reflection, healing, and meaningful change.

Do you worry about what tomorrow holds? Overthinking about events from the past? If you want to learn to experience the present moment, you have come to the right page. My name is Danielle and I specialize in Anxiety, Depression, and PTSD. In addition to those specialties, I support clients through a wide range of challenges including stress management, life-transitions, and self-esteem issues. I strive to create a relaxed, authentic, non-judgmental therapy environment; So, don’t be surprised if you are welcomed by a woman in jeans and sneakers. I believe the goal in therapy is for each individual to reach their highest potential.

I believe prioritizing mental health is key to stability in life. I know there is a better world out there and people need the tools to connect with their upmost insight for mental well being. In this field I am always eager to research and find healing processes to tailor the need of each individual.

I love counseling – both giving and receiving. For over 40 years, I have helped adoptive families utilizing my law and counseling degrees.

The counseling aspect spans a wide range of populations, including tweens, seniors, singles, couples, and multiple family members.

I met my wife at graduate school while working on my Master’s in Social Work, and we have since adopted three children.

Reaching out is hard, especially if you've already tried therapy before and it didn't quite get you where you needed to go. I want you to know that doesn't mean something's wrong with you, it usually just means the approach wasn't the right fit. I've spent over a decade working with people carrying trauma and addiction, adults and teens both, and what I care about most is helping you feel truly understood, maybe for the first time, before we even get to the work of healing.