Dr. Brent Steven Guy – Internist / Geriatrician | Waterloo, ON

Dr. Brent Steven Guy, a respected Internist / Geriatrician, focuses on evidence-based medicine and personalized care plans. Practicing in Waterloo, ON, he serves the surrounding communities with a commitment to high-quality patient-centered care. His practice adheres to the standards and guidelines established by the College of Physicians and Surgeons of Ontario (CPSO). Dr. Guy provides comprehensive care in Internal Medicine and Geriatric Care, addressing the complex health needs of adult patients, including seniors.

He graduated with a Medical Degree from Memorial University of Newfoundland Faculty of Medicine in 2014. Dr. Guy has completed extensive post-graduate medical training, including residency in Internal Medicine, and has obtained certification in Geriatric Medicine. His training emphasizes a thorough understanding of adult and geriatric health issues, enabling him to deliver expert diagnostic and management services.

Dr. Guy’s clinical philosophy is rooted in a clear and educational approach, ensuring patients and their families understand their health conditions and treatment options. He is dedicated to providing compassionate, evidence-based care tailored to each individual. Fluent in English, he is committed to serving the Waterloo community with professionalism and respect.

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

Endocrine & Metabolic Disorders

• Adrenal Gland Disorders: Diagnosis and management of conditions affecting the adrenal glands, such as adrenal insufficiency.
• Osteoporosis & Metabolic Bone Disease: Diagnosis, risk assessment, and treatment strategies for conditions affecting bone strength and metabolism.
• Thyroid Disorders: Management of hypothyroidism, hyperthyroidism, thyroid nodules, and other thyroid conditions.

Geriatric Syndromes & Focused Elder Care

• Nutritional Assessment & Weight Loss: Investigating unintentional weight loss and malnutrition, providing guidance on nutritional support for older adults.
• Delirium Prevention & Management: Identifying risk factors for delirium (acute confusion) in hospitalized or ill older adults and implementing management strategies.
• Polypharmacy & Medication Optimization: Expert review of multiple medications to reduce adverse effects, eliminate unnecessary drugs (deprescribing), and simplify regimens.

Complex Diagnostic & Multi-System Issues

• Perioperative Medical Optimization: Pre-surgical assessment and management of medical conditions to minimize operative risks and ensure smoother recovery.
• Investigation of Anemia: Diagnosing the underlying cause of low red blood cell counts.
• Evaluation of Undifferentiated Symptoms: Investigating complex presentations like fatigue, weight loss, or pain without a clear diagnosis.

Dr. Guy 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.

• 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 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.
• Frailty Evaluation and Management: Assessing for frailty (increased vulnerability) and developing interventions to enhance resilience, function, and independence.
• Coordination of Specialist Care: Acting as a central point of contact to help manage and coordinate input from various medical specialists for patients with multi-system diseases.
• Geriatric Psychiatry Liaison Support: Assessing and managing mood disorders (like depression, anxiety) and behavioral changes often associated with dementia or other conditions in older adults.

Note: This list represents some of the key services offered by Dr. Guy. 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. Guy'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. Guy's practice is located in Waterloo West, in the Columbia Forest and Clair Hills neighborhood of Waterloo. The location is conveniently situated near the Westmount Golf & Country Club. Patients can access the clinic via Grand River Transit (GRT), including bus services and the ION Light Rail. The facility is wheelchair accessible. Parking is available at the facility.

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

In ON, medical consultations with specialists like Dr. Guy 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. Guy. 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.

Can a family member or friend accompany me to the appointment?

Yes, absolutely. Patients are welcome to bring a family member, friend, or caregiver to their appointment for support, to help recall information, or to ask questions. Especially for complex discussions or if memory is a concern, having a second person present can be very beneficial.

What should I bring to my first appointment?

Please bring:

• Your provincial health card (Ontario Health Insurance Plan (OHIP) card).
• The referral letter if you have it.
• A complete list of ALL your current medications (prescriptions, over-the-counter, vitamins, herbs), including doses. Bringing the actual bottles/packaging is often very helpful.
• A list of your past medical history, surgeries, and known allergies.
• Any relevant medical reports, lab results, or imaging (X-ray, CT, MRI) reports you possess.
• A list of your specific questions or concerns for Dr. Guy.

435 The Boardwalk
Waterloo, ON N2T 0C2

Phone: (519) 741-5252 | Fax: (519) 741-5772

The facility is wheelchair accessible.

Dr. Guy 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/Guy-Brent-Steven/0295439-103451