Dr. Thomas Christopher O’Connor – Internist / Geriatrician | Mississauga, ON

With extensive experience in Internal Medicine and Geriatric Care, Dr. Thomas Christopher O'Connor serves as a trusted medical specialist. Practicing in Mississauga, ON, he provides comprehensive care in Internal Medicine and Geriatric Care, adhering to the standards set by the College of Physicians and Surgeons of Ontario (CPSO). He primarily serves adult patients, including older adults and seniors, ensuring their complex health needs are met with evidence-based practices.

Dr. O'Connor graduated with a Medical Degree from the University of Toronto in 1989.0 (Canada). He has completed extensive postgraduate medical training, including residency and fellowship programs focused on Internal Medicine and Geriatrics. His certification and ongoing professional development reflect his commitment to maintaining a high standard of care in his specialties.

His clinical philosophy is centered on an evidence-based and informative approach, prioritizing patient safety, thorough diagnostic evaluation, and individualized treatment plans. Dr. O'Connor is dedicated to serving the Mississauga community and speaks English fluently, ensuring clear communication with his patients and their families.

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

Select Infectious & Inflammatory Conditions

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

Endocrine & Metabolic Disorders

• Calcium and Parathyroid Disorders: Evaluation and management of conditions related to abnormal calcium levels and parathyroid gland function.
• Thyroid Disorders: Management of hypothyroidism, hyperthyroidism, thyroid nodules, and other thyroid conditions.
• Osteoporosis & Metabolic Bone Disease: Diagnosis, risk assessment, and treatment strategies for conditions affecting bone strength and metabolism.

Management of Chronic Diseases

• Chronic Liver Disease: Diagnosis and management of various liver conditions such as fatty liver disease, chronic hepatitis, and cirrhosis complications.
• Dyslipidemia (High Cholesterol): Assessment and management of abnormal lipid levels through lifestyle advice and medication to reduce cardiovascular risk.
• Chronic Kidney Disease (CKD): Monitoring kidney function, managing complications (anemia, bone disease, electrolytes), and strategies to slow disease progression.

Dr. O'Connor 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.

• Non-Surgical Management of Cardiovascular Conditions: Medical management of conditions like stable coronary artery disease, heart failure, arrhythmias, and hypertension.
• Medication Review and Optimization (Deprescribing): Systematic review of all medications (polypharmacy) to ensure appropriateness, minimize side effects and interactions, and deprescribe unnecessary drugs.
• Internal Medicine Consultation for Primary Care: Providing specialist opinion and management recommendations to family physicians for complex adult patient cases.
• Second Opinion Consultations: Providing an independent expert review and opinion on complex diagnoses or treatment plans.
• Consultation for Undiagnosed Symptoms: Expert evaluation for patients experiencing persistent or puzzling symptoms that require specialized diagnostic investigation to determine the underlying cause.

Note: This list represents some of the key services offered by Dr. O'Connor. 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. O'Connor'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. O'Connor's practice is located in the vibrant Mississauga City Centre, within the Square One Area neighborhood, close to the Rattray Marsh Conservation Area. The clinic is situated within Sunnybrook Health Sciences Centre, providing a convenient and accessible location for patients. The area is well-served by MiWay (Mississauga Transit), ensuring ease of access via public transportation. Parking is available at the facility, with ample options for patients arriving by car. The facility is wheelchair accessible.

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

In ON, medical consultations with specialists like Dr. O'Connor 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. O'Connor. 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 exactly does an Internist (Internal Medicine Specialist) do?

An Internist is a medical doctor who specializes in diagnosing, treating, and preventing complex diseases primarily in adults. They are experts in managing conditions affecting multiple organ systems (Chronic Liver Disease, Diabetes Mellitus (Type 1 & 2)), handling challenging diagnostic puzzles, and coordinating care for patients with multiple chronic illnesses. They often serve as consultants to other physicians.

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. O'Connor.

Sunnybrook Health Sciences Centre
100 Queensway West, Department of Anaesthesia
Mississauga, ON L5B 1B8

Phone: (905) 848-7663

The facility is wheelchair accessible.

Dr. O'Connor 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/OConnor-Thomas-Christopher/0047015-60993