About
Dr. Lydia Yee-Chin Cheung is a Family Doctor. Practicing at Joseph Brant Hospital in Thornhill, ON, she is dedicated to providing high-quality, comprehensive, and patient-centered family medical care. She is registered with The College of Physicians and Surgeons of Ontario (CPSO) and practices in accordance with the standards set by this regulatory body and the principles of modern family medicine. She focuses on providing continuous and comprehensive primary medical care for individuals and families across all ages and stages of life. This includes preventative care, diagnosis and treatment of acute and chronic illnesses, and management of ongoing health needs, serving as the central point for patient care. She serves patients of all ages, from newborns and infants through to children, adolescents, adults, and seniors.
Dr. Lydia Yee-Chin Cheung completed her Medical Degree. She brings valuable clinical experience to the practice. She has developed skills or a strong interest in areas such as comprehensive primary care within family practice. She is also dedicated to ongoing professional development to stay current with the latest advancements in family medicine.
Key aspects of her practice philosophy include a strong belief in patient-centered care, ensuring that treatment plans are tailored to individual needs, values, and circumstances; a commitment to evidence-based medicine, integrating the latest research with clinical expertise to provide the highest standard of care; a holistic approach to health, considering the physical, mental, emotional, and social factors that influence a patient's well-being. She provides consultations in English.

Dr. Lydia Yee-Chin Cheung provides comprehensive family medical care for a wide variety of health concerns affecting patients of all ages, including but not limited to:
Dermatological Skin Conditions
- Viral Skin Infections (Common Warts, Molluscum Contagiosum, Herpes Simplex, Herpes Zoster/Shingles): Providing effective treatment for various viral skin conditions to alleviate symptoms, shorten duration of outbreaks, prevent complications (like PHN or secondary bacterial infection), and reduce transmission where applicable.
- Psoriasis (Mild to Moderate Plaque Psoriasis - Initial Management): Helping patients manage the symptoms of psoriasis (scaling, plaques, itchiness) and reduce skin inflammation through effective topical therapies and supportive care.
- Fungal Skin, Nail & Hair Infections (Tinea species, Candidiasis, Onychomycosis): Providing effective remedies for bothersome and often contagious fungal infections of the skin, hair shafts, and nails, along with advice on hygiene and prevention of recurrence.
Adult Common Health Issues
- Benign Prostatic Hyperplasia (BPH) - Symptom Management & Monitoring: Referral to urology for severe symptoms, complications (e.g., acute urinary retention, recurrent UTIs, bladder stones, renal impairment due to obstruction), or if surgical intervention (e.g., TURP) is being considered.
- Venous Insufficiency & Varicose Veins (Conservative Management & Lifestyle Advice): Initial assessment and conservative management of symptoms related to chronic venous insufficiency (CVI) and varicose veins, such as leg aching, heaviness, swelling (edema), skin changes (e.g., hyperpigmentation, lipodermatosclerosis, venous eczema), and uncomplicated superficial thrombophlebitis. Ruling out deep vein thrombosis (DVT) if acute unilateral swelling/pain.
- Restless Legs Syndrome (RLS) - Initial Assessment & Management: Providing initial management strategies for RLS, including lifestyle modifications (e.g., regular exercise, good sleep hygiene, avoiding caffeine/alcohol close to bedtime), checking and correcting iron deficiency (ferritin levels), and considering pharmacological options (e.g., dopamine agonists like pramipexole/ropinirole, gabapentin enacarbil) for moderate to severe, frequent symptoms that significantly impact sleep or quality of life. Referral to neurology or sleep specialist for complex or refractory cases.
- Allergic Conjunctivitis & Dry Eye Syndrome - Primary Care Management: Primary care approach to common, non-sight-threatening eye discomforts.
Pediatric Common Issues
- Childhood Immunization Schedule Management & Counseling: Providing timely and safe immunizations, addressing parental questions or concerns about vaccines with evidence-based information and empathy, managing catch-up schedules if needed, and documenting all immunizations accurately.
- Pediatric Asthma, Eczema & Allergy Management (Primary Care): Diagnosing and managing common chronic conditions in pediatric patients, such as asthma (including education on inhaler/spacer technique, trigger avoidance, development of personalized asthma action plans for home and school), eczema (atopic dermatitis - focusing on skincare, emollients, topical corticosteroids/calcineurin inhibitors, trigger management), and allergic rhinitis (hay fever). Includes initial assessment and guidance for food allergies, with referral to pediatric allergists for confirmation and comprehensive management if indicated.
- Adolescent Health Care & Counseling (Physical, Mental, Sexual Health, Lifestyle, Substance Use): Supporting the unique physical, emotional, and social health needs of adolescents during this critical period of rapid development, fostering autonomy, responsible decision-making, and a positive transition to adulthood.
- Common Childhood Infections (Viral & Bacterial - Ear, Throat, Chest, Skin, GI): Providing prompt, effective, and child-friendly medical care for common infections and acute conditions to ensure quick recovery, appropriate antibiotic stewardship (avoiding unnecessary antibiotics for viral illnesses), and prevent complications.
Common Chronic Conditions
- Gastroesophageal Reflux Disease (GERD) & Peptic Ulcer Disease (PUD) - Chronic Management: Helping patients control symptoms of heartburn, regurgitation, and epigastric pain, and prevent long-term issues associated with chronic acid exposure or ulcers.
- Dyslipidemia (High Cholesterol, High Triglycerides): Screening, diagnosis, and management of abnormal lipid profiles (high LDL cholesterol, low HDL cholesterol, high triglycerides) through lifestyle modifications (heart-healthy diet, physical activity, weight management) and, when indicated, prescription of lipid-lowering medications (e.g., statins, ezetimibe, fibrates, PCSK9 inhibitors) based on cardiovascular risk assessment.
- Irritable Bowel Syndrome (IBS) - Primary Care Management: Diagnosing IBS based on symptom criteria after ruling out other conditions, and providing primary care management strategies including dietary advice (e.g., low FODMAP diet introduction, fiber management), lifestyle modifications, stress reduction techniques, and symptomatic treatment for abdominal pain, bloating, diarrhea, and/or constipation.
This list offers some examples of common conditions managed in family practice. A diagnosis is always based on an individual assessment by Dr. Cheung. If your specific health concern isn't listed, please contact the clinic to discuss your needs.
- Management of Other Chronic Conditions (e.g., GERD, IBS, Anemia): Coordinated management of diverse chronic illnesses within a primary care setting.
- Occupational Health Aspects & Work-Related Health Concerns (Initial Assessment): Addressing health concerns that may be related to a patient's occupation, providing initial assessment for work-related injuries or illnesses, and completing necessary forms (e.g., fitness to work, return to work).
- Childhood & Adolescent Immunization Administration & Counseling: Administering the complete schedule of publicly funded childhood and adolescent vaccines to protect against serious infectious diseases. Includes catch-up schedules and addressing parental concerns with evidence-based information.
- Hypertension & Lipid Disorder Management (High Blood Pressure & Cholesterol): Developing personalized strategies to control hypertension and lipid levels effectively, involving patient partnership in shared decision-making and goal setting.
- Coordination with Allied Health Professionals & Community Health Services: Referring to and collaborating effectively with other healthcare providers integral to comprehensive care, such as physiotherapists, occupational therapists, dietitians, psychologists, social workers, speech-language pathologists, chiropractors, pharmacists, optometrists, audiologists, and various community support services (e.g., home care, mental health teams, diabetes education programs, addiction services, public health units).
Note: This list highlights some of the key services offered by Dr. Cheung. For a comprehensive understanding of all services, or to discuss your specific health needs, please schedule a consultation.
All services are provided in accordance with the scope of practice for Family Doctors in ON and the ethical and professional standards set by The College of Physicians and Surgeons of Ontario (CPSO).
At Joseph Brant Hospital, family medicine is centered on a collaborative partnership to help individuals like you achieve significant improvements in your health, manage ongoing conditions effectively, and enhance your overall well-being. Dr. Cheung frequently works with patients towards goals such as:
- It's rewarding for Dr. Cheung to see patients with their child having difficulty with toilet training or experiencing bedwetting beyond a certain age achieve getting timely, astute, and accurate diagnoses for puzzling, unusual, or concerning symptoms from <preferred_name>, leading to the prompt initiation of appropriate treatment pathways and significantly alleviating anxiety and uncertainty and return to important activities like confidently enjoying a varied, balanced, and largely unrestricted diet (unless medically indicated for very specific diagnosed conditions like celiac disease or severe allergies) without undue fear of triggering adverse reactions, pain, or significant digestive distress.
- With Dr. Cheung's care, managing needing advice on managing their child's ADHD medication or school accommodations aims for achieving more restorative and consistent sleep patterns and experiencing increased daytime energy levels and cognitive function after effectively addressing underlying sleep disturbances with <preferred_name>'s comprehensive assessment and management plan, empowering patients to get back to what they love, like confidently travelling domestically for weekend getaways or internationally for extended explorations with greater assurance in their health, stamina, and ability to manage new foods, climates, and environments successfully.
- For those challenged by a really sore throat, difficulty swallowing, and a high fever that might be strep or tonsillitis, Dr. Cheung offers strategies to reach feeling fully empowered by <preferred_name> to ask pertinent and challenging questions, openly voice their preferences and values regarding treatment options, and participate actively and meaningfully as a respected partner in all their healthcare decisions, which can mean rediscovering the joy of successfully maintaining a clean, organized, and uncluttered living space that actively contributes to their sense of calm, mental clarity, physical safety, and overall feelings of well-being at home.
- Dr. Cheung understands the impact of a painful, red eye that might be conjunctivitis (pink eye) or something else. That's why treatment is geared towards their family being effectively connected by <preferred_name> to invaluable local community resources, patient advocacy organizations, and peer support groups that have demonstrably improved their coping abilities, social support network, and overall well-being, helping patients get back to regularly going for long, challenging, and invigorating hikes in scenic natural environments, cycling picturesque country routes for hours, or swimming multiple laps at the local community pool for both physical fitness and mental relaxation with greater ease.
Your personalized healthcare plan, developed in discussion with Dr. Cheung, will be thoughtfully designed to help you reach your specific functional, preventative, and wellness objectives. She believes in empowering patients with the knowledge and support needed to take an active role in their health journey.
Dr. Cheung's practice at Joseph Brant Hospital is situated in a family medical practice in the central Thornhill neighborhood of Thornhill. The clinic is conveniently located near local community centers, schools, and shopping areas and is accessible via major local public transit routes. Ample parking is generally accessible close to the clinic entrance; please observe local signage.
- What is 'continuity of care' and why is it important with a family doctor like Dr. Cheung?
- Having continuity of care with Dr. Cheung means that she is your consistent point of contact for your health needs over many years. This long-term relationship allows Dr. Cheung to understand the nuances of your health, track changes over time, and provide care that is personalized and proactive. It improves communication, reduces duplication of tests, helps in managing chronic conditions more effectively, and fosters a stronger doctor-patient partnership, all leading to better overall health management.
- Is seeing a family doctor (Family Doctor) covered by Ontario Health Insurance Plan (OHIP) in ON?
- Medically necessary visits to a family doctor are typically covered by the Ontario Health Insurance Plan (OHIP) for eligible residents with a valid health card. However, some services (e.g., cosmetic procedures, most travel medicine consultations, sick notes, insurance forms, driver's medicals) may not be covered and might have an associated fee. Please confirm with Joseph Brant Hospital if you have questions about specific non-insured services or potential fees.
- What exactly is a family doctor (Family Doctor) and what is their role?
- A family doctor, often called a general practitioner (GP), is a medical doctor specializing in comprehensive primary healthcare for individuals and families across all ages and life stages. She serves as your first point of contact for most health concerns, offering preventative care (like check-ups, immunizations, and health screenings), diagnosing and treating acute illnesses (such as infections or minor injuries), managing chronic conditions (like diabetes, hypertension, or asthma), providing mental health support, and coordinating your care by referring you to specialists when necessary. A key aspect of their role is building long-term relationships with patients to promote overall health and well-being.
- How long do appointments with Dr. Cheung typically last?
- Typically, a regular appointment with Dr. Cheung to discuss a specific health concern or for a follow-up lasts about 10 to 15 minutes. However, if you are a new patient, scheduled for a complete physical exam, or need to discuss multiple or complex health matters, the appointment will likely be scheduled for a longer duration, such as 30 minutes. Please inform the reception staff at Joseph Brant Hospital about the nature of your visit when booking, so sufficient time with Dr. Cheung can be arranged.
- How can I find a family doctor (Family Doctor) in ON who is accepting new patients?
- Finding a family doctor in Ontario who is accepting new patients can be challenging. The College of Physicians and Surgeons of Ontario website often has a 'Find a Doctor' tool. In Ontario, you can also register with Health Care Connect. You can also ask friends, family, or colleagues for recommendations, or contact local community health centres or new patient clinics directly.
- Do I need a referral to see a family doctor (Family Doctor) in ON?
- Generally, you do not need a referral to see a family doctor if they are accepting new patients. However, finding a family doctor accepting new patients can be difficult. Provincial resources like Health Care Connect may be helpful. A referral from a family doctor is usually required to see specialists.
- What should I do if I have an urgent medical issue when Joseph Brant Hospital is closed?
- If you have a life-threatening emergency, call 911 or go to the nearest emergency department. For urgent, non-life-threatening issues, consider an urgent care centre or walk-in clinic. Some family health teams offer after-hours services; check with Joseph Brant Hospital or Dr. Cheung during regular hours to see if such arrangements are in place for their practice. Our clinic voicemail [(905) 889-3634] may also provide instructions or resources for after-hours care.
Joseph Brant Hospital
18 Centre Street, Emergency Department
Thornhill, ON, L4J 1E9
Phone: (905) 889-3634
Dr. Lydia Yee-Chin Cheung is regulated by the Regulated Health Professions Act, 1991 & Medicine Act, 1991 (Ontario) in ON and is a registered member in good standing with The College of Physicians and Surgeons of Ontario (CPSO).
Registration Number: 95243
Verify registration with The College of Physicians and Surgeons of Ontario (CPSO): https://doctors.cpso.on.ca/DoctorDetails/Cheung-Lydia-YeeChin/0273395-95243
Family doctors like Dr. Cheung are skilled in managing a wide range of health issues. For urgent or life-threatening emergencies, please call 911 or visit the nearest emergency department. It is always recommended to maintain open communication with your family doctor about all aspects of your health, including any treatments received from other practitioners.