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PSYCHOTHERAPY & ASSESSMENT CLINIC

Live A Life Worth Living

Serving adolescents and adults in Toronto and across Ontario

Expert Care, Tailored to You

Dr. Danielle Kofler founder and clinical psychologist at One Psychology

STORY OF ONE PSYCHOLOGY CLINIC

Founded by Clinical Psychologist Dr. Danielle Kofler, One Psychology Clinic was created with a vision for a more thoughtful, personalized, and boutique approach to mental health care. Our team works with adolescents and adults navigating anxiety, depression, ADHD, trauma, relationships, and emotional overwhelm. No issue is too big or too small - you are worthy of support.

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What makes us different:

  • Psychologist-Led Care: Most of our clinicians have doctoral-level training, reflecting extensive education, clinical experience, and specialized expertise.

  • Comprehensive Assessment Services: We provide ADHD, psychoeducational, psychodiagnostic, and WSIB assessments for adolescents and adults.

  • Specialized Evidence-Based Treatments: Our team offers therapies such as CBT, DBT, CPT, ERP, and ACT tailored to each client’s goals and needs.

EXPLORE OUR RANGE OF SERVICES

What We Offer

01

Psychotherapy

People come to therapy for many reasons. Some are navigating anxiety, depression, relationship challenges, ADHD, substance use, or major life transitions. Others are seeking a deeper understanding of themselves, their patterns, and how they want to move through the world. Whatever brings you here, our role is to help you better understand what's getting in the way, identify what matters most, and create meaningful, lasting change.

ANXIETY & DEPRESSION

RELATIONSHIPS & DATING

ADHD & EXECUTIVE FUNCTIONING

IDENTITY & LIFE TRANSITIONS

TRAUMA & SUBSTANCE USE

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02

Assessment

Psychological assessments provide a deeper understanding of how you think, learn, feel, and function. Whether you're seeking diagnostic clarity, academic accommodations, workplace support, or guidance for future planning, our assessments are designed to provide meaningful insights and practical recommendations.

ADHD ASSESSMENT

ADHD ASSESSMENT & COGNITIVE TESTING

PSYCHODIAGNOSTIC ASSESSMENT

PSYCHOEDUCATIONAL ASSESSMENT

03

Teen Therapy

Adolescence can be a time of significant change, bringing new pressures, challenges, and opportunities for growth. Our clinicians work collaboratively with teens to help them navigate emotional, social, academic, and family concerns while building the skills and confidence needed to thrive.

ANXIETY & STRESS

SCHOOL & ACADEMIC PRESSURES 

FRIENDSHIPS & SOCIAL CHALLENGES

IDENTITY & SELF-ESTEEM

EMOTIONAL & BEHAVIOURAL DIFFICULTIES

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04

Relationships Support

What we nurture grows - and relationships are no exception. From couples counselling and family therapy to parent coaching, our clinicians help individuals and families build stronger connections, navigate challenges, and create healthier patterns of communication.

COUPLES THERAPY

FAMILY THERAPY

PARENT COACHING

THE INTAKE PROCESS

How it works

Casey Hon, a clinical therapist at One Psychology Clinic.

01

Fill Out New Client Form

SHARE A FEW DETAILS ABOUT YOUR CONCERNS, GOALS, PREFERENCES, & AVAILABILITY.

02

Get Matched

WE WILL REVIEW YOUR INFO AND RECOMMEND THE CLINICIAN BEST SUITED TO YOUR NEEDS.

03

Book First Session

YOU WILL BE CONNECTED WITH YOUR CLINICIAN AND BOOKED FOR YOUR FIRST SESSION.

THE RIGHT PEOPLE MAKE ALL THE DIFFERENCE

Meet The Team

Dr. Danielle Kofler psychologist supporting teens and adults in Toronto

Dr. Danielle Kofler

CLINICAL PSYCHOLOGIST

Dr. Danielle Kofler is a Clinical Psychologist and Clinic Director who helps adolescents and adults better understand themselves, shift patterns, and move toward meaningful change.

Sabrina Simmons psychological associate at One Psychology in Toronto

Sabrina Simmons

PSYCH. ASSOCIATE

Sabrina Simmons is a Psychological Associate who works with adults navigating anxiety, trauma, and emotion dysregulation using CBT and practical coping strategies.

Casey Hon therapist at One Psychology in Toronto

Casey Hon

CLINICAL THERAPIST

Casey Hon, M.A. (Ph.D. candidate), provides assessments and therapy for teens and adults navigating anxiety, depression, ADHD, and trauma.

Tom Willman therapist at One Psychology in Toronto

Tom Willman

CLINICAL THERAPIST

Tom Willman, ME.d. (Ph.D. candidate), works with teens and adults experiencing ADHD, impulse control difficulties, substance use, anxiety, depression, and trauma.

Vicky Biberberg therapist providing individual therapy couples counselling and family therapy in Toronto

Vicky Biberberg

MSW STUDENT

Vicky Biberberg is an MSW candidate who supports teens and adults navigating anxiety, depression, and relationship concerns using CBT and IFS-informed approaches.

Anisha Jahangardi therapist at One Psychology in Toronto

Anisha Jahagirdar

CLINICAL THERAPIST

Anisha Jahagirdar, M.A. (Ph.D. candidate), supports teens and adults navigating anxiety, trauma, self-esteem, and life transitions with warmth and compassion.

Talia Vacca therapist at One Psychology in Toronto

Talia Vacca

CLINICAL THERAPIST

Talia Vacca, M.A. (Ph.D. candidate), provides therapy and assessment for adolescents and adults, with particular expertise in ERP for OCD and gender identity assessments.

Dr. Bryan Butler is a clinical psychologist providing individual therapy and mental health support

Dr. Bryan Butler

CLINICAL PSYCHOLOGIST

Dr. Bryan Butler is a Clinical Psychologist who helps professionals and adults manage stress, OCD, and PTSD through structured and goal-oriented therapy.

NOT SURE WHERE TO START?

Finding the right support can feel overwhelming.

If you have questions, our team is happy to help.

BEFORE GETTING STARTED...

Frequently Asked Questions

Professional Affiliations

CPBAO
OPA
WSIB
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