Durham Region Psychologists & Therapists Offering Trusted Mental Health Support

Mills Gosse Psychology has supported individuals and families across the Durham Region for more than 20 years. Based in Ajax, Ontario, our team of psychologists and psychotherapists provides care at multiple clinic locations, including Oshawa, Whitby, Peterborough, Mississauga, and Hamilton.

We offer therapy and assessment services for children, teens, and adults, including specialized support for first responders, injured workers (WSIB), and individuals recovering from motor vehicle accidents (MVA). We also provide psychological testing services, including psychoeducational, ADHD, and gifted assessments.

Known for clinical excellence and a thoughtful, client-centred approach, our services are available in person, by phone, and online, allowing care to be flexible and accessible.

We are currently accepting new clients with minimal wait times.
Please reach out to learn more or to begin the intake process.

Workplace Safety and Insurance Board (WSIB)

Motor Vehicle Accident
(MVA)

Services for
First Responders

Therapy for
Adults

Therapy for
Children & Teens

Online
Therapy

Psychoeducational
Assessments

Gifted
Assessments

ADHD
Assessments

General
Psychological & Diagnostic

Issues & Conditions

At Mills Gosse Psychology, we support our clients with a wide range of common mental health challenges.

• Attention-Deficit/Hyperactivity Disorder (ADHD)

• Anger & Anger Management Programs

• Obsessive-Compulsive Disorder (OCD)

• Trauma & Posttraumatic Stress Disorder (PTSD)

• Anxiety, Panic & Phobias

• Depression & Mood Disorders

• Grief & Bereavement

• Sleep Disorders

Our Services

We proudly offer a wide range of psychological services, including therapy and assessments for:

• WSIB Assessment & Treatment

• MVA Assessment & Therapy

• First Responder Therapy

• Therapy For Adults, Children & Teens

• Online Therapy

• Psychoeducational Testing

• Gifted Testing

• ADHD Testing

• General Psychological & Diagnostic Testing

• Services for Organizations

Working With Us 

With our extensive experience, we take pride in maintaining a practice that operates thoughtfully and efficiently.

• Team: A diverse team of therapists and assessors who offer services in several languages. 

• Referrals: Our services do not require a physician’s referral. However, we accept referrals from various providers and organizations.

• Fees & Payments: Our services are covered through most third-party health insurance plans, including employee benefits and WSIB. To ensure accessibility, we offer a sliding fee scale to qualified clients.

Our Locations & Service Areas

Our head office is located in Ajax, Ontario.

We also have a dedicated team of psychologists and psychotherapists providing care at additional clinic locations in Oshawa, Whitby, Peterborough, Mississauga, and Hamilton.

Many individuals and families choose to travel to us when wait times elsewhere are long. Distance should never be a barrier to accessing high-quality mental health care. If you are seeking support for yourself or someone you care about, our team is here to help.

In Person

By Phone

Online

In Your Community