Dr. Lillian Lai-Yun Siu – Internist / Geriatrician | Toronto, ON

Dr. Lillian Lai-Yun Siu, a respected Internist / Geriatrician, focuses on evidence-based medicine and personalized care plans. Practicing in Toronto, ON, she serves the surrounding communities with a commitment to delivering comprehensive and compassionate healthcare. Her practice is aligned with the standards set by the College of Physicians and Surgeons of Ontario (CPSO), ensuring high-quality medical services for all patients.

She provides comprehensive care in Internal Medicine and Geriatric Care, addressing the complex health needs of adult patients, including seniors. Dr. Siu has a strong background in managing chronic diseases, geriatric syndromes, and age-related medical conditions, aiming to improve quality of life and functional independence for her patients.

Dr. Siu graduated with a Medical Degree from the University of Toronto in 1991 and has completed extensive post-graduate medical training in internal medicine and geriatrics. She holds key certifications and has dedicated her career to advancing her expertise in adult and elderly healthcare, ensuring her patients receive up-to-date and evidence-based treatment.

Her clinical philosophy emphasizes clear and educational communication, tailored treatment plans, and holistic patient-centered care. She is committed to serving the Toronto community, speaking both English and Chinese, and ensuring her patients feel informed and supported throughout their healthcare journey.

Dr. Siu provides expert care for adults with a wide range of medical conditions, including:

Endocrine & Metabolic Disorders

• Osteoporosis & Metabolic Bone Disease: Diagnosis, risk assessment, and treatment strategies for conditions affecting bone strength and metabolism.
• Adrenal Gland Disorders: Diagnosis and management of conditions affecting the adrenal glands, such as adrenal insufficiency.
• Calcium and Parathyroid Disorders: Evaluation and management of conditions related to abnormal calcium levels and parathyroid gland function.

Geriatric Syndromes & Focused Elder Care

• Falls, Mobility & Balance Disorders: Multifactorial assessment to identify causes of falls and gait instability; implementation of prevention strategies.
• Frailty Assessment & Management: Identifying and managing frailty to improve resilience, maintain function, and enhance quality of life in older adults.
• Polypharmacy & Medication Optimization: Expert review of multiple medications to reduce adverse effects, eliminate unnecessary drugs (deprescribing), and simplify regimens.

Select Infectious & Inflammatory Conditions

• Complex Infections Consultation: Providing diagnostic and management expertise for challenging infections, often in consultation with primary care.
• Fever of Unknown Origin (FUO) Workup: Systematic investigation to determine the cause of prolonged, unexplained fevers.
• Management of Select Rheumatologic Conditions: Care for common inflammatory conditions such as gout or polymyalgia rheumatica, or initial assessment for suspected autoimmune diseases.

Dr. Siu manages a wide range of complex adult and geriatric health conditions. This list highlights common areas of focus. If your condition is not listed, please note that internal medicine specialists address diverse and often multi-systemic diseases. Consultation is typically initiated via referral from your primary care physician.

• Frailty Evaluation and Management: Assessing for frailty (increased vulnerability) and developing interventions to enhance resilience, function, and independence.
• Assessment of Functional Decline: Investigating and managing sudden or gradual changes in an older adult's ability to perform daily activities.
• Cognitive and Memory Assessment: Detailed evaluation for concerns about memory loss or changes in thinking; diagnosis and management of dementia and mild cognitive impairment.
• Thyroid Disorder Management: Diagnosis and ongoing management of conditions like hypothyroidism, hyperthyroidism, and thyroid nodules.
• Management of Complex Chronic Diseases: Ongoing care and treatment optimization for adults managing multiple chronic conditions such as diabetes, heart disease, kidney disease, hypertension, and respiratory illnesses.

Note: This list represents some of the key services offered by Dr. Siu. As a specialist in Internal Medicine and Geriatric Care, she provides comprehensive diagnostic and management services. For specific inquiries about whether your condition falls within Dr. Siu's scope of practice, please discuss with your referring physician or contact the clinic.

All medical services are provided in accordance with the standards of practice set by the College of Physicians and Surgeons of Ontario (CPSO).

Dr. Siu's practice is situated in the vibrant Bay Street Corridor (Discovery District) neighborhood of Toronto, within Norfolk General Hospital. The location is conveniently near Ontario Place and Trillium Park, offering a scenic environment for patients. Accessible via TTC, patients can reach the clinic easily by subway, streetcar, or bus. The facility is wheelchair accessible. Parking is available at the facility.

How is payment handled for appointments with Dr. Siu? Is it covered by Ontario Health Insurance Plan (OHIP)?

In ON, medical consultations with specialists like Dr. Siu are typically covered by your provincial health insurance (Ontario Health Insurance Plan (OHIP)) when you present a valid health card and have the required referral. You generally do not pay directly for the consultation service itself. Some specific procedures, forms, or administrative tasks might not be covered by Ontario Health Insurance Plan (OHIP) and may incur a separate fee according to provincial guidelines. Please inquire if you have questions about uninsured services.

Can I book an appointment directly or do I absolutely need a referral?

A referral from your family physician or another medical specialist is required to see Dr. Siu. As experts in Internal Medicine and Geriatric Care, Internists and Geriatricians see patients based on specific medical questions posed by the referring doctor. This ensures continuity of care and that the consultation is appropriate for your needs. Please have your doctor forward the referral information.

What should I do if I have an urgent medical problem?

Dr. Siu's office provides specialist consultations and is not equipped for emergency care. If you have an urgent medical issue or emergency, please contact your family doctor, go to the nearest hospital Emergency Department, or call 911.

Norfolk General Hospital
700 University Avenue, Emergency Department
Toronto, ON M5G 2M9

Phone: (416) 946-2911 | Fax: (416) 946-4467

The facility is wheelchair accessible.

Dr. Siu is a licensed physician regulated by the College of Physicians and Surgeons of Ontario (CPSO) under the Medicine Act, 1991 in ON. Patients are typically seen by referral from their primary care physician.

Verify registration with the College of Physicians and Surgeons of Ontario (CPSO): https://doctors.cpso.on.ca/DoctorDetails/Siu-Lillian-LaiYun/0049946-63924