Medical Clinic

Welcome to ProHealth Medical Clinic.  We are committed to delivering top quality healthcare.

Our Teams

Online Booking

Online Appointment Booking

Patients of Dr. Lam, Dr. Hsu, and Dr. Iris Chang can book appointments online.

Click Here

Please note, Dr. Lam, Dr. Hsu, and Dr. Chang are NOT accepting new patients. If you are not a pre-existing patient of theirs, please do not use the online booking system.

You will need to book the appointment under your own e-mail address.  If you will be booking for a family member using your own e-mail address, please indicate this so that we can process the booking and to prevent it from being rejected.  Only existing patients can book appointments.


Dr. Justina Sam



Key News

For Family medicine, we do NOT accept new patients now. For specialists, please refer to the respective doctor's information below.

Online booking is only available for pre-existing patients under Dr. Hsu, Dr. Chang, Dr. Lam.

We do NOT provide COVID vaccination. Please contact your pharmacy for related arrangement.

COVID-19 Precautions, please read here!

Our Teams

Our office is staffed by four family physicians, two allergists & clinical immunologists, a gastroenterologist, a registered nurse, and a dietitian.

Family Physicians

Dr. David Hsu

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Dr. Iris Chang

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Dr. Wendy Zhang

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Dr. Ryan Lam

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Dr. Justina Sam


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Dr. Judith Donsky

Allergist & Clinical Immunologist

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Dr. Ken Sun

Allergist & Clinical Immunologist

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Dr. Jason An


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Joanne Lee R.D.

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Contact Us


+416 222 0660


+416 222 9238


If you need to change your appointment, please contact our office at least 3 business days in advance.  Thank you for your cooperation.

Our Location

1100 Sheppard Ave East
Suite #403
North York, M2K 2W1

Location Detail


When Exiting Highway 401, take the exit at Leslie St and head North. Then turn left at Sheppard Ave and head West. Turn Right at Ambrose Rd and then turn right onto Eunice Rd.

Via Subway:

Exit TTC Line 4 at Bessarion Station and walk East to Ambrose Rd
or Exit TTC Line 4 at Leslie Station and walk West to Ambrose Rd


Parking is available in the front and rear of 1100 Sheppard Ave E. and 1110 Sheppard Ave E.
If no parking is available in either lot, parking is available on the north side of Ambrose Rd.

Working Hours

Monday - Saturday
9AM - 5PM

*Operating hour of each doctor may vary.

*Saturday hours vary on occasion. Please contact us for detail.

About Us

ProHealth  Medical

At ProHealth Medical Clinic, we are committed to provide the top quality healthcare to our patients. Our office is staffed by four family physicians, two allergists & clinical immunologist, a gastroenterologist, a registered nurse, and a dietitian.

Our customer service team is well trained, able to speak English, Mandarin and Cantonese so that our patients’ requests are better served.

With full laboratory, a diagnostic imaging department and a pharmacy in our building, patients can access to healthcare support in one location.

Laboratory and Diagnostic Imaging Department in our building

Open 6 Days a Week - Operating hour of each doctor may vary

English, Mandarin, and Cantonese speaking staff

Pharmacy in the same building

Wheelchair Accessible

Free Parking

Contact Us !




    Can I take COVID vaccine here in your clinic?

    To book your COVID vaccine at a vaccination site in Toronto, please visit the Vaccine Toronto Pre Registration Page.

    Can I take COVID vaccine & Flu vaccine together?

    Generally speaking, you can take both vaccines together at the same time. But if you have a concern, please check with your family physician first. 

    Should I take Shingles vaccine?
    According to the government of Canada, the Shingle vaccine is recommended for individuals over 50 years of age without contraindications. For detail, please refer to
    Can I get Shingles for FREE?

    According to the government of Canada, to be eligible to get the free shingles vaccine in Ontario, you must be 65 to 70 years old and have not previously received a publicly funded shingles vaccine. Individuals born from 1949 to 1952 who missed the opportunity to receive the publicly funded shingles vaccine are eligible to receive Shingrix and complete the 2-dose series by December 31, 2023. For detail, please refer to

    If you don’t qualify for the free shingles vaccine, you can still get vaccinated with a prescription from your family doctor or other primary care providers while you can purchase the vaccine in advance at your local pharmacy.

    Appointment and OHIP

    Appointment and OHIP

    How do I make online appointment booking?

    Only pre-existing patients of Dr. Hsu,  Dr. Lam, and Dr. Chang can use the online booking system. Please see the detail here.

    If you are a patient of other doctors in our clinic please call us at (416) 222-0660 to make an appointment.

    What if I cannot keep my appointment?

    Please let us know at least 3 business days in advance if you cannot keep your appointment. If you miss your appointment without notification, a $100 fee will be applied. 

    What if my OHIP card expires?
    Doctors will not be able to see you if your OHIP card expires. Please check your OHIP card expiry date before you visit our clinic and contact Ministry of Health to update your OHIP card as soon as possible if your card is close to expire.
    Are there services not covered by OHIP?
    There are several services that are not covered by OHIP - for example: uninsured vaccine administration, various sick or doctor notes, insurance, work and medical forms, travel advice, photocopy and printing of medical reports etc. Please contact our office at 416-222-0660 for more detail.
    What do I need to bring for my appointment?

    You need to bring your update OHIP card every time when you see your doctor. OHIP card has to be valid and not expire in order for us to check you in. If it is your first visit, you can bring along your past medications record.

    My test reports

    My Test Reports

    What should I do after completing lab test and other tests assigned by doctors?

    The lab reports usually would be ready and sent to your family physician’s office within around 6 working days (different laboratory lead time may vary) You can contact us to set up appointment to review your reports with your family physician. 

    I forget to do the lab test assigned by my doctors after a few months. Can I still do those tests using the requisition forms?

    The lab test requisition form assigned by doctors to you is valid for 6 months from the date of prescription. You can still go to the respective lab or test centre to do the test within 6 months of time.



      What is MEDEO?

      MEDEO is a virtual portal used by healthcare providers to send documents and information to patients securely. It can be used for online bookings also. You need to first set up your MEDEO account here

      Please follow the instructions and after completing the setup, you should be able to receive messaging from doctors and make online appointments booking for doctors (Dr. Iris Chang, Dr. Hsu, Dr. Lam only)

      Instruction on How to Access MEDEO (English)

      Instruction on How to Access MEDEO (Chinese)