Dr. Darrell Hoi-San Tan – Internist / Geriatrician | Toronto, ON

As a skilled Internist / Geriatrician, Dr. Darrell Hoi-San Tan offers expert diagnostic services and management for a wide range of adult health issues. Practicing in Toronto, ON, he serves the surrounding communities with a focus on providing comprehensive care in Internal Medicine and Geriatric Care. His practice adheres to the high standards set by the College of Physicians and Surgeons of Ontario (CPSO), ensuring that patients receive safe, evidence-based treatment tailored to their needs.

Dr. Tan graduated with a Medical Degree from the University of Toronto in 2002 and has completed extensive post-graduate medical training in Internal Medicine and Geriatrics. His certifications include fellowship in both specialties, reflecting his commitment to ongoing professional development and excellence in patient care. He is experienced in managing complex adult and geriatric health conditions through a multidisciplinary approach.

Driven by a philosophy of evidence-based and informative practice, Dr. Tan is dedicated to delivering personalized care that respects patient preferences and clinical best practices. He speaks multiple languages, including Cantonese, English, French, and Spanish, to better serve Toronto’s diverse population. His clinical focus is on addressing the unique healthcare needs of older adults, with a commitment to improving quality of life and functional independence.

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

Complex Diagnostic & Multi-System Issues

• Evaluation of Undifferentiated Symptoms: Investigating complex presentations like fatigue, weight loss, or pain without a clear diagnosis.
• Management of Patients with Multiple Comorbidities: Coordinating care and treatment plans for individuals managing several complex health conditions simultaneously.
• Investigation of Anemia: Diagnosing the underlying cause of low red blood cell counts.

Endocrine & Metabolic Disorders

• Calcium and Parathyroid Disorders: Evaluation and management of conditions related to abnormal calcium levels and parathyroid gland function.
• Adrenal Gland Disorders: Diagnosis and management of conditions affecting the adrenal glands, such as adrenal insufficiency.
• Thyroid Disorders: Management of hypothyroidism, hyperthyroidism, thyroid nodules, and other thyroid conditions.

Geriatric Syndromes & Focused Elder Care

• Delirium Prevention & Management: Identifying risk factors for delirium (acute confusion) in hospitalized or ill older adults and implementing management strategies.
• Cognitive Impairment & Dementia Syndromes: Comprehensive assessment for memory loss/cognitive changes; diagnosis and management of Alzheimer's disease, vascular dementia, and others.
• Falls, Mobility & Balance Disorders: Multifactorial assessment to identify causes of falls and gait instability; implementation of prevention strategies.

Dr. Tan 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.

• Assessment of Functional Decline: Investigating and managing sudden or gradual changes in an older adult's ability to perform daily activities.
• Consultation for Undiagnosed Symptoms: Expert evaluation for patients experiencing persistent or puzzling symptoms that require specialized diagnostic investigation to determine the underlying cause.
• Management of Geriatric Syndromes: Specialized care for common age-related conditions including falls, frailty, cognitive impairment (dementia, delirium), polypharmacy, urinary incontinence, and malnutrition.
• Comprehensive Geriatric Assessment (CGA): A holistic, multidimensional evaluation tailored to older adults, assessing medical conditions, functional ability, cognition, mood, nutrition, social support, and medication use.
• Advance Care Planning Discussions: Facilitating conversations about future healthcare preferences and goals of care, including discussions about powers of attorney for personal care.

Note: This list represents some of the key services offered by Dr. Tan. As a specialist in Internal Medicine and Geriatric Care, he provides comprehensive diagnostic and management services. For specific inquiries about whether your condition falls within Dr. Tan'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. Tan's practice is located in the vibrant Garden District, within the Ryerson neighborhood of Toronto. The clinic is conveniently situated near the University Settlement Recreation Centre and Spadina House, making it accessible for residents and visitors alike. Patients can reach the facility easily via TTC, including subway, streetcar, and bus routes. The facility is wheelchair accessible. Parking is available at the facility.

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

In ON, medical consultations with specialists like Dr. Tan 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. Tan. 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 happens after the initial consultation?

After your assessment, Dr. Tan will typically send a detailed consultation report with findings and recommendations to your referring physician. Depending on your specific situation and the reason for referral, Dr. Tan may arrange follow-up appointments, order further tests, or transition care management back to your family doctor with specialist guidance. The plan will be discussed with you.

Suite 108, 30 Bond St.
Toronto, ON M5B 1W8

Phone: (416) 864-5568 | Fax: (416) 864-5310

The facility is wheelchair accessible.

Dr. Tan 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/Tan-Darrell-HoiSan/0191226-77988