Specialized Trauma & Anxiety Therapy, NY.

Central Suffolk County, NY Areas We Serve

Supporting you through anxiety, depression, trauma, and more.

Take the First Step Today

Ready to talk?
Call 631-804-6937 to get started.

Get to Know Dr. Nissen

Learn more about Dr. Nissen’s background, approach, and credentials.

Integration of

Clinical practice, scientific research, teaching, and professional leadership.

Central Suffolk County, NY Areas We Serve

Our practice is built on warmth, trust, and collaboration. We take the time to truly understand your story—past and present—and tailor your therapy experience around what matters most to you. You’ll find a compassionate partner in your growth journey who listens without judgment, supports with empathy, and challenges with care.

Centereach
Coram
Farmingville
Holbrook
Holtsville
Lake Grove
Selden

Available Hours

We offer in-person and virtual appointments evenings and weekends.

Phone

631-804-6937

Address

2500 Nesconset Hwy, Bldg 5D 
Stony Brook, NY 11790

Disclaimer

The information provided on this website is intended for general informational and educational purposes only and is not a substitute for professional psychological advice, diagnosis, or treatment. Viewing this website, using the information contained herein, or communicating with the practice via email or contact forms does not establish a psychologist–patient relationship.

If you are experiencing a mental health emergency, do not use this website. Instead, call 911 or go to your nearest emergency room. You can also contact the National Suicide & Crisis Lifeline at 988 for immediate support.

Psychological services are provided only in states where the psychologist is appropriately licensed. While efforts are made to protect your privacy, please be aware that electronic communication (including contact forms and emails) may not be fully secure.

No guarantees are made regarding outcomes or results from psychological services, as each individual’s circumstances and progress will vary.

By using this website, you acknowledge and agree to the terms of this disclaimer.
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