The Anxiety Treatment Center of Greenwich

Expert anxiety treatment for children, teens and adults

If worry, fear or panic is getting in the way of everyday life, you don’t have to face it alone. We’re here to help you and your family move forward with clarity and confidence.

Therapy dog greeting visitors at the office door
ATC therapy dog resting in the office

Free consultation

Talk with us to see if we’re the right fit for you or your child.

ABOUT US

Specialized anxiety treatment in Cos Cob, Greenwich

Welcome to The Anxiety Treatment Center of Greenwich, founded by Jill Vaughan Tesei and Maryellen Pachler Kennell. We provide expert diagnosis and caring, evidence-based treatment for anxiety in children, adolescents and adults, and we bring families into the work whenever it helps.

Our Mission

To provide expert, compassionate care for children, adolescents and adults struggling with anxiety and related disorders.

Who We Help

Services

Evidence-based treatments with decades of research behind them

Cognitive Behavioral Therapy

A structured, short-term therapy that helps you recognize and change unhelpful thoughts and behaviors.

Exposure Therapy

Gradually facing feared situations in a safe, supportive setting to reduce avoidance and build confidence.

Anxiety Therapy

Learn the signs and types of anxiety, and how specialized, evidence-based care can help.

Call

Have a question about getting started? Call (203) 769-1365

Greenwich harbor at golden hour

WHY CHOOSE US

Yale-trained specialists who still teach the next generation

Both of our founders trained at Yale and still teach there. Every treatment plan is shaped around each person’s age, concerns and goals, and parents are part of the process when it helps.

Anxiety & OCD Specialists

Evidence-Based Treatment

Family-Centered Care

Comforting Therapy Dogs

What We Treat

Help for panic, phobias, OCD, tics and more

From panic attacks to hair-pulling, these are the conditions we see most often. Pick one to read how we treat it.

Don’t see what you’re dealing with? Call (203) 769-1365 and ask.

Proud NeuroStar TMS Provider

NeuroStar uses transcranial magnetic stimulation (TMS) to treat depression without medication. Sessions happen in the office, need no anesthesia, and you can drive yourself home afterward. Our sister practice, TMS Greenwich, offers NeuroStar treatment.

  • FDA-cleared
  • No medication
  • No anesthesia or downtime

How It Works

Getting started is a phone call

01

01. Call our office

Call (203) 769-1365 to schedule an initial call.

02

02. Complete your forms

Download and fill out the child or adult new patient forms.

03

03. Bring them to your visit

Bring your completed forms to your first appointment.

04

04. Begin your care

Treatment is designed around your age, concerns and goals.

ATC therapy dog waiting on the office stairs

Meet Our Canine Comfort Team

Meet Thunder & Carson!

Our therapy dogs are here to provide comfort and emotional support during your visit. They’re friendly, hypoallergenic and always ready for a snuggle.

Our Founders

Meet Jill and Maryellen

Anxiety Treatment Center of Greenwich logo

Founded by two board-certified nurse practitioners with Yale training in child, adolescent and adult mental health.

Maryellen earned her nursing, master’s and post-master’s degrees at Yale University and worked as a clinical researcher at the Yale Child Study Center. She specializes in CBT for anxiety disorders and OCD in young people, offers behavioral parent training, and lectures at the Yale University School of Nursing.

Maryellen Pachler Kennell, APRN Co-Founder, Board-certified Nurse Practitioner (child & adolescent psychiatry)
Maryellen Pachler Kennell, APRN

With over two decades of psychiatric experience, Jill cares for children, adolescents and many adults, with a special focus on panic disorder, generalized, social and separation anxiety, phobias and OCD. She teaches child psychiatry as a clinical professor at the Yale University School of Nursing.

Jill Vaughan Tesei, APRN Co-Founder, Board-certified Family Psychiatric Nurse Practitioner
Jill Vaughan Tesei, APRN

FAQS

Frequently Asked Questions

Still have a question?

We provide specialized care for children, adolescents and adults, tailoring treatment to each stage of life, from helping a young child build coping skills to guiding teens through school and social challenges or supporting adults with anxiety at home or work.

Call us at (203) 769-1365 to schedule an initial call. You’ll also need to download and complete the appropriate new patient forms before your first visit.

We don’t bill insurance directly, but we encourage you to explore your out-of-network benefits. Our services are generally reimbursed by health savings accounts.

Genomind is a genetic test that helps guide medication decisions by analyzing how your body may respond to different mental health treatments. We offer it to help personalize your care plan.

NeuroStar is an FDA-cleared, non-invasive treatment for depression and other mental health conditions. It’s done in-office, requires no anesthesia or downtime, and is typically well tolerated. Learn more at TMS Greenwich.

Thunder and Carson resting on the office floor

Contact Us

Call us, or send a note

Call our office to schedule an initial call or ask any questions, and please complete the new patient forms before your first visit.

Call Our Office

(203) 769-1365

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