Dr. Denise Abby Sum

Dr. Denise Sum provides assessment and treatment for a wide spectrum of mental health conditions, including:

Neurodevelopmental Disorders (Psychiatric Aspects)

• Attention-Deficit/Hyperactivity Disorder (ADHD) - Adult & Child/Adolescent: A neurodevelopmental disorder characterized by persistent patterns of inattention and/or hyperactivity-impulsivity that interfere with functioning or development.
• Intellectual Disability - Co-occurring Psychiatric Conditions: Diagnosing and managing mental health conditions that can occur alongside intellectual disabilities, adapting treatment approaches as needed.
• Tourette's Syndrome & Tic Disorders (Psychiatric Co-morbidities): Addressing co-occurring psychiatric conditions like ADHD or OCD in individuals with Tourette's or other tic disorders.

Anxiety, OCD & Trauma-Related Disorders

• Social Anxiety Disorder (Social Phobia): Intense fear or anxiety of social situations where one might be scrutinized by others, leading to avoidance.
• Generalized Anxiety Disorder (GAD): Excessive, persistent worry and anxiety about various everyday life events or activities, often difficult to control.
• Agoraphobia: Fear and avoidance of situations where escape might be difficult or help unavailable if panic-like symptoms occur, such as public transportation, open spaces, or crowds.

Mood Disorders

• Major Depressive Disorder (MDD) / Clinical Depression: Persistent feelings of sadness, loss of interest or pleasure, fatigue, changes in appetite or sleep, and difficulty concentrating, significantly impairing daily functioning.
• Seasonal Affective Disorder (SAD): A type of depression related to changes in seasons, most commonly beginning in the fall and continuing through the winter months.

This list is not exhaustive. Effective mental health care is highly personalized. Please consult with Dr. Denise Sum for an accurate diagnosis and tailored treatment plan.

• Management of ADHD, Oppositional Defiant Disorder (ODD), & Conduct Disorder in Youth: Multimodal treatment approaches for neurodevelopmental and disruptive behavior disorders, including medication management, behavioral interventions, and family therapy.
• Supportive Psychotherapy: A therapeutic approach aimed at reducing distress, reinforcing coping mechanisms, and improving adaptive functioning through a supportive therapeutic relationship.
• Treatment of Mood & Anxiety Disorders in Children & Adolescents (Depression, Anxiety, OCD): Age-appropriate psychopharmacological and psychotherapeutic interventions for young people experiencing mood and anxiety disorders.
• Augmentation & Combination Strategies for Treatment-Resistant Conditions: Employing advanced psychopharmacological strategies, including combining medications or adding augmenting agents, for individuals who have not responded adequately to initial treatments.
• Psychopharmacological Management & Medication Optimization: Prescribing, monitoring, and adjusting psychotropic medications (e.g., antidepressants, antipsychotics, mood stabilizers, anxiolytics, stimulants) to treat various mental health disorders, focusing on efficacy, tolerability, and minimizing side effects.
• Medication Management for ADHD in Adults & Children/Adolescents: Prescription and monitoring of stimulant and non-stimulant medications for Attention-Deficit/Hyperactivity Disorder across the lifespan.

Note: This list provides a general overview. Treatment approaches are highly individualized. Please discuss with Dr. Sum for care relevant to your specific mental health needs.

All psychiatric services are provided in accordance with the standards of practice set by the College of Physicians and Surgeons of Ontario (CPSO) and relevant psychiatric care guidelines. Contact the clinic or your referring physician regarding new patient intake and referral processes.

McMaster Children's Hospital is situated in the vibrant area near central Scarborough, accessible via local public transit routes. The hospital is nestled within a community area known for its diverse population and local points of interest, offering a welcoming environment for families and young patients. The facility is wheelchair accessible and aims to provide a comfortable and private environment for all patients. Paid parking options are conveniently located nearby, some with direct access to the hospital building, ensuring ease of access for families and visitors. The setting is discreet, professional, and designed to support the mental health needs of children and adolescents in a welcoming atmosphere that respects privacy and promotes healing.

Are psychiatric consultations and treatments with Sum, a Child and Adolescent Psychiatrist, covered by Ontario Health Insurance Plan (OHIP) in ON?

Medically necessary consultations, diagnostic assessments, and medication management provided by a licensed Child and Adolescent Psychiatrist like Sum are generally covered by Ontario Health Insurance Plan (OHIP) in ON when a referral from a family doctor is in place. Coverage for psychotherapy services provided by a psychiatrist can vary; some provinces cover it, while others may have limitations or it may be part of hospital-based programs. Specific medications may also require special authorization or be subject to formulary restrictions. It's crucial to discuss coverage specifics for therapy or any specialized treatments with Sum's office or Ontario Health Insurance Plan (OHIP).

Do I need a referral to see Sum, a Child and Adolescent Psychiatrist?

Yes, a referral from your family physician or another medical doctor (e.g., a pediatrician for child psychiatry, or an ER physician for urgent assessment) is almost always required to see a Child and Adolescent Psychiatrist such as Sum for services covered by the provincial health plan. Mental health conditions often benefit from initial assessment by a primary care provider who can determine the need for specialist psychiatric care. The referral ensures coordinated care, appropriate triaging, and transfer of relevant medical history.

When should someone consider a referral to a Psychiatrist like Dr. Sum?

A referral to a Psychiatrist like Dr. Sum is typically considered when mental health symptoms are severe, persistent, complex, or not responding adequately to initial treatments provided by a family doctor or therapist. This can include: thoughts of suicide or self-harm; severe depression or mania; psychosis (hallucinations, delusions); debilitating anxiety or panic attacks; complex PTSD; severe OCD; suspected bipolar disorder or schizophrenia; treatment-resistant depression; or when medication management by a specialist is indicated. Psychiatrists are also consulted for diagnostic clarification and comprehensive treatment planning, especially for co-occurring conditions.

Does Sum offer psychotherapy (talk therapy)?

Many psychiatrists, including potentially Sum, are trained in various forms of psychotherapy (talk therapy) and may offer it as part of their treatment approach, either as a standalone treatment or in combination with medication. The specific types of psychotherapy offered can vary (e.g., Cognitive Behavioral Therapy - CBT, psychodynamic therapy, supportive therapy). It's best to inquire directly with Sum's office or discuss this during your initial consultation to understand her approach to therapy and if it's a service She provides or if She would refer you to another mental health professional like a psychologist or social worker for more intensive or specialized psychotherapy if needed.

What if I experience side effects from medication prescribed by Sum?

It's common for psychotropic medications to have potential side effects, especially when starting a new medication or adjusting a dose. Sum will discuss common side effects to watch for. If you experience side effects, it's very important to communicate this to Sum or her office promptly. Do not stop taking your medication suddenly unless instructed to do so by Sum, as this can sometimes cause withdrawal symptoms or a worsening of your condition. Sum can help manage side effects by adjusting the dosage, switching to a different medication, or suggesting strategies to mitigate them.

What does a Child and Adolescent Psychiatrist like Sum specialize in?

A Child and Adolescent Psychiatrist is a medical doctor (MD) who has completed specialized training in psychiatry, which is the branch of medicine focused on the diagnosis, treatment, and prevention of mental, emotional, and behavioral disorders. Unlike psychologists, psychiatrists can prescribe medication. She is a Child and Adolescent Psychiatrist, focusing on the unique mental health needs of children and adolescents. Sum is trained to assess both the mental and physical aspects of psychological problems and can provide a range of treatments including psychotherapy, medications, and sometimes other interventions like ECT or rTMS.

What is the main difference between a Psychiatrist like Sum and a Psychologist?

The main difference is that a Psychiatrist, like Sum, is a medical doctor (MD) who has completed medical school and then specialized residency training in psychiatry. Because they are physicians, psychiatrists can diagnose mental health conditions, prescribe and manage psychotropic medications, and provide various forms of psychotherapy. They can also order medical tests to rule out physical causes of psychiatric symptoms. A Psychologist typically has a doctoral degree (PhD or PsyD) in psychology and is trained in psychological assessment, diagnosis, and providing psychotherapy (talk therapy). Psychologists generally cannot prescribe medication in Canada, though they often work closely with psychiatrists or family doctors who do.

McMaster Children's Hospital
3030 Birchmount Rd. Unit 3E, Department of Pediatrics
Scarborough, ON M1W 3W3

Phone: (416) 495-2563 | Fax: (416) 495-2426

The facility is wheelchair accessible and aims to provide a comfortable and private environment for all patients.

Dr. Sum is a licensed Child and Adolescent Psychiatrist regulated by the College of Physicians and Surgeons of Ontario (CPSO) under the Regulated Health Professions Act, 1991 and Medicine Act, 1991 in ON. A referral from a family physician or pediatrician is typically required for consultations with Dr. Sum for child and adolescent psychiatric services covered by the provincial health plan.

Verify registration with the College of Physicians and Surgeons of Ontario (CPSO): https://doctors.cpso.on.ca/DoctorDetails/Sum-Denise-Abby/0266250-93536