Peter Vadas MD, PhD

Allergist and Clinical Immunologist

New patients are welcome by physician or nurse practitioner referral.  The practice is open to both adults and children.  Referrals may be faxed to 416.864.3033  Dr. Vadas's staff will contact patients directly to arrange an appointment, after a faxed referral is received.

Please note that referral must include referring physician or NP on official letterhead including CPSO number.

New patients are seen by referral only.  The practice is open to both adults and children.  Referrals should be faxed to 416.864.3033. 
Our office contacts patients directly with appointment information.  Patients are advised to discontinue use of anti-histamines at least 3 days before scheduled appointment.

Office Location

St. Michael's Hospital

36 Toronto St., Suite 700A

Toronto, ON M5C 2C5


The clinic at 36 Toronto St. Suite 700A is a 4 minute walk south of St. Michael's Hospital at the corner of Victoria and Adelaide.  It is about 100 m. from the subway station.



Initial visits are approximately 1.5 - 2 hours.


Please bring with you

  • your valid health card
  • a list of your medications, naturopathic and homeopathic supplements
  • copies of any relevant test results
  • the names and mailing addresses of physicians you wish reports sent to


If you have to reschedule your appointment, we would appreciate as much advance notice as possible, to allow us to offer your time slot to another patient.  However, we require a minimum of 24 hours advance notice for cancelled or rescheduled appointments.  Patients who do not provide advance notice of cancellations will not be rescheduled. 


Cancellation List

Patients must be available on short notice (3 - 4 hours) in order to be considered for a cancellation time slot.  If you wish to be placed on the cancellation list, please inform the office staff and leave a contact cell phone number.  If a time slot becomes available at short notice, a text message will be sent to all individuals whose names appear on the cancellation list.  The time slot will be given to the first available respondent.


Test Results

Our office experiences a very high call volume.  As a result, Dr. Vadas does not provide test results, medical advice or prescription refills by phone, fax or email.  Patients may schedule an appointment with our office for these services or contact their family doctor.


Email Correspondence

Email correspondence is not secure and cannot guarantee confidentiality of health information.  For this reason, Dr. Vadas will not provide test results, medical advice or discuss medical conditions by email.



Appointment reminders may be sent be voice, email or text message.  At the time of your initial booking, you will be asked for your email address or cell phone number for the purpose of a reminder call or contact.  You will note two features on the email reminder: an option to add the appointment to your calendar program and a link to Google maps for our office location.