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| ✅ Weight Management Services Covered under OHIP | ✅ PHIPA & PIPEDA Compliant | ✅ Now Female Family Physicians are available in MyCare+ and Med Square Medical Centre | ✅ Accepting new patients and walk-ins. | ✅ Skip the paperwork and register quickly using our Self-Service Registration Kiosk. | ✅ WESN Health is now a REGISTERED TRADEMARK in Canada and Worldwide | ✅ Flu Vaccine is NOW Available in all WESN Health Medical Centres | ✅
ADHD Assessment Guide for Children

ADHD Assessment for Children in Mississauga: Signs, Steps and What to Expect

Every child is distracted, restless or impulsive sometimes. But when those behaviours are constant, show up at home and at school, and start affecting learning, friendships or family life, it may be time for an ADHD assessment. This guide explains the signs of ADHD in children, how a pediatric assessment works in Ontario, and how to prepare so you get the most out of the appointment.

What is ADHD?

Attention-deficit/hyperactivity disorder (ADHD) is one of the most common neurodevelopmental conditions in childhood. It affects how the brain manages attention, activity level and impulse control. ADHD is not caused by bad parenting or a lack of effort, and with the right support, children with ADHD can do very well.

Doctors describe three presentations:

  • Predominantly inattentive: difficulty focusing, following instructions and staying organised. Often missed, especially in girls, because the child may be quiet rather than disruptive.
  • Predominantly hyperactive-impulsive: constant movement, difficulty waiting, and acting without thinking.
  • Combined: a mix of both. This is the most common presentation.

Signs of ADHD in children

Inattention

  • Makes careless mistakes in schoolwork
  • Has trouble staying focused on tasks or play
  • Seems not to listen when spoken to directly
  • Starts tasks but does not finish them
  • Struggles to organise belongings and time
  • Avoids tasks that need sustained mental effort, such as homework
  • Often loses school supplies, jackets or toys
  • Is easily distracted and forgetful in daily activities

Hyperactivity and impulsivity

  • Fidgets, squirms or cannot stay seated
  • Runs or climbs when it is not appropriate
  • Talks excessively or blurts out answers
  • Has difficulty waiting for a turn
  • Interrupts or intrudes on others

When is it more than typical childhood behaviour?

Doctors look for a clear pattern rather than a single behaviour. In general, an ADHD diagnosis considers whether:

  • Symptoms have lasted at least six months
  • Several symptoms were present before age 12
  • Symptoms appear in two or more settings, such as home and school
  • They clearly interfere with learning, relationships or daily life
  • Another condition does not better explain them

Conditions that can look like ADHD

Part of a good assessment is ruling out other causes and checking for conditions that often occur alongside ADHD. These include:

  • Anxiety or depression
  • Learning disabilities, such as dyslexia
  • Autism spectrum disorder (ASD)
  • Sleep problems, including sleep apnea
  • Hearing or vision problems
  • Major stress or changes at home

Because these overlap, an assessment by a pediatrician experienced in developmental and mental health conditions is especially valuable.

How a pediatric ADHD assessment works

  1. Referral. In Ontario, a pediatrician consultation needs a referral from your family doctor, a walk-in clinic physician or a nurse practitioner. With a valid referral, the consultation is covered by OHIP.
  2. Questionnaires. You and your child’s teacher may be asked to complete standard rating scales. These compare your child’s behaviour to other children of the same age.
  3. Detailed history. The pediatrician will ask about pregnancy and birth, early development, health, sleep, school performance, friendships and family history.
  4. Meeting your child. The doctor will talk with and observe your child, and do a physical examination.
  5. Diagnosis and plan. If ADHD is diagnosed, the pediatrician will explain the results and discuss a treatment plan. This may take more than one visit.

How to prepare for the appointment

  • Recent report cards and any notes or emails from teachers
  • A list of your main concerns, with real examples
  • Notes on your child’s sleep, appetite and daily routine
  • Information about early development (when they walked and talked)
  • Any previous assessments, such as psychology or speech reports
  • A list of current medications and supplements
  • Family history of ADHD, learning difficulties or mental health conditions

What treatment can look like

ADHD treatment is tailored to the child and family. A plan may include:

  • Parent education and behavioural strategies, such as clear routines, consistent rewards and breaking tasks into steps
  • School supports, which in Ontario may include accommodations through an Individual Education Plan (IEP)
  • Medication, when appropriate. Both stimulant and non-stimulant options are available, and your pediatrician will explain the benefits and side effects
  • Support for related issues, such as anxiety, sleep or learning difficulties
  • Regular follow-up to track progress and adjust the plan

Frequently asked questions

At what age can a child be assessed for ADHD?

ADHD can be assessed from about age 4, although most children are diagnosed in the early school years when the demands of the classroom make symptoms more noticeable.

Do I need a referral for an ADHD assessment in Ontario?

Yes, to see a pediatrician you need a referral from a family doctor, walk-in clinic physician or nurse practitioner. With a referral, the pediatric consultation is covered by OHIP.

How long does an ADHD assessment take?

It often involves one or more appointments plus questionnaires from parents and teachers. Your pediatrician will let you know what to expect for your child.

Can girls have ADHD?

Yes. Girls are more likely to have the inattentive type, which is quieter and easier to miss. They may be seen as daydreamers rather than disruptive.

Does my child have to take medication if they have ADHD?

No. Medication is one option. Many plans combine behavioural strategies, school support and, when it is helpful, medication. You decide together with your pediatrician.

Pediatric ADHD assessments in Mississauga

WESN Health’s pediatric clinic at Med Square Medical Centre, 4188 Living Arts Drive, Unit 5, Mississauga, is led by Dr. Salam Al-Jubouri, MD, FRCPC and Dr. Samar Wadi, MD, FRCPC, consultant pediatricians with more than 20 years of experience each. They provide general pediatric consultations, mental health assessments (ADHD, anxiety and depression), developmental and autism assessments, newborn care, and ongoing care for children with complex needs.

Appointments are by referral only. Routine appointments are usually available within 1 to 2 weeks, and urgent referrals are seen within the same week whenever possible. Ask your provider to fax the referral to 1-888-890-9293 or email medsquare@wesnhealth.com, or call (905) 808-3002 with questions.

Updated: November 8, 2026

This article is for general information and does not replace advice from your doctor. If you think you are having a medical emergency, call 911 or go to the nearest emergency department.

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