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Modern Mental Health Care
Without the Obstacles

Expert psychiatric care and psychotherapy designed to help you quiet the noise, clear the fog, and regain control. Find your balance in-person at our Princeton, NJ and Greenwich, CT clinics, or online from the comfort of your home.

WELCOME TO NISSI WELLNESS CLINIC

At Nissi Wellness Clinic, we prioritize your mental health and well-being. Our expert team is dedicated to providing personalized care that empowers you to thrive.

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Compassion Focused

Culturally Sensitive

Motivational Interviewing

Solution Focused Brief (SFBT)

EFFICIENCY

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PRECISION

Nissi Wellness Clinic | Princeton, NJ and Greenwich, CT

COMPASSION

Nissi Wellness Clinic | Princeton, NJ and Greenwich, CT

We understand the importance of your time. Experience efficient, compassionate, and precise care that values your well-being, ensuring you get the attention you need without unnecessary delays.

Services We Provide

We offer specialized, compassionate mental health care designed to guide you toward lasting stability and peace of mind. Our psychiatric and therapy services are grounded in evidence-based clinical practices and delivered both online and at our physical offices in Princeton, NJ, and Greenwich, CT. We specialize in the following:

Behavioral &
Mood Disorders

Navigating intense emotional highs, lows, or behavioral shifts requires a highly structured and personalized approach. We help you understand your emotional patterns and develop the practical skills needed to build lasting stability and balance.

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Stress  & Trauma Support

Life's heaviest experiences can leave a lasting, exhausting impact on both your mind and body. We offer a safe, non-judgmental space to help you process past trauma, manage daily chronic stress, and safely rebuild your resilience.

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ADHD &
Insomnia Treatment

Chronic focus issues and restless, sleepless nights can leave you feeling completely overwhelmed and drained. We provide targeted diagnostic evaluations and concrete behavioral strategies to help you quiet your racing thoughts and regain your energy.

Anxiety & Depression Management

Persistent worry, fear, and low mood do not have to define your daily life. We combine compassionate psychotherapy and expert clinical strategies to help you ease the weight of anxiety and rediscover a sense of joy and calm.

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Medication Management

Finding the right psychiatric support should never feel like trial and error. We provide safe, thoughtful diagnostic evaluations and ongoing prescription management to ensure your treatment plan safely supports your mind's natural balance.

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Telepsychiatry &
Talk Therapy

High-quality mental health care should fit seamlessly into your schedule without causing extra stress. Connect with our licensed specialists from the comfort of your home through secure, HIPAA-compliant virtual video sessions.

Insurance & Payment

We make paying for care as stress-free as possible. We are in-network with the following major providers for both in-person and telehealth visits.

Nissi Wellness Clinic Accepted insurance for in person and telehealth, oxford health
Nissi Wellness Clinic Accepted insurance for in person and telehealth, bluecross blueshield
Nissi Wellness Clinic Accepted insurance for in person and telehealth, united healthcare
Nissi Wellness Clinic Accepted insurance for in person and telehealth, horizon
Nissi Wellness Clinic Accepted insurance for in person and telehealth, medicare
Nissi Wellness Clinic Accepted insurance for in person and telehealth, cigna
Nissi Wellness Clinic Accepted insurance for in person and telehealth, oscar
Nissi Wellness Clinic Accepted insurance for in person and telehealth, quest
Nissi Wellness Clinic Accepted insurance for in person and telehealth, aetna
Nissi Wellness Clinic Accepted insurance for in person and telehealth, carelon

Cash payments ARE accepted.​

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YOUR MENTAL HEALTH MATTERS

Nissi Wellness Clinic is led by Amanda A. Opoku, a dual board-certified Family and Psychiatric Nurse Practitioner dedicated to providing compassionate, personalized mental health care through therapy and medication management.​

Learn more about our story and approach.

Amanda Opoku

Client Testimonials

Real feedback from individuals who have found clarity and support through our services. Here is how our team has helped clients navigate life's challenges in Princeton, Greenwich, and online. 

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J.T.

Patient

I had the pleasure of working with Amanda, and I can't say enough good things about her! She is incredibly professional, knowledgeable, and truly goes above and beyond to ensure her clients are satisfied. I highly recommend Amanda to anyone looking to improve their health!

B.B.

Patient

Had a great experience coming to Nissi Wellness Clinic, the staff was very friendly and you can tell they know what they're doing there!

T.S.

Patient

Wonderful wellness clinic. Love the owner. They are very helpful and answer questions thoroughly.

S.A.

Patient

The staff was so knowledgeable, and the atmosphere was calming.
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