Markham Family Physicians experienced a cybersecurity incident in December 2025, during which certain information was accessed and exfiltrated from our systems. Following the incident, we notified all potentially affected patients directly by letter or email. If you previously received a notice from us regarding this incident, please read this update carefully.

If you did not receive a letter or email from us regarding this incident, then your personal information and personal health information was not affected and this update does not apply to you.

We want to reassure our affected patients that we took this situation very seriously from the outset. With the assistance of specialized experts, we conducted a thorough forensic investigation and implemented additional safeguards to help prevent a similar incident from occurring in the future.

Unfortunately, our investigation has confirmed that some of the information taken from our systems has been published on the dark web. While we do not know exactly which specific information may have been involved, we cannot rule out the possibility that your personal information is among it. For this reason, and in the interest of transparency, we felt it was important to inform you.

The personal information and personal health information relating to you that may have been involved in the December incident remains limited to the information identified in the notice you received in February.

We understand that updates of this nature can be concerning, and we remain available to answer your questions and support you. If you have any questions or concerns, please do not hesitate to contact us at: cyberissue@markhamfht.com.

Book by Phone
(905) 471-9999

377 Church Street

Monday - Thursday8:30AM - 8PM
Friday8:30AM - 3PM
Saturday9:30AM - 3PM
Sunday12:30PM - 3PM
377 Church Street
Suite 101 and Suite 201
Markham, ON
L6B 1A1
Phone
(905) 471-9999
Fax
(905) 471-3627
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377 Church Street Staff & Practitioners

Nurses

Kaitlyn McClymont RPN
Mali Mohammed RPN

Nurse Practitioners

Shaindy Apelowicz
Kelly Van Camp
Stephen Ng

Physicians

Dr. Dana Abenstein
Dr. Martha Carruthers
Dr. Tom Filosa
Dr. Allan Grill
Dr. Jeanne Huo
Dr. Daryl Lougheed
Dr. William Newton
Dr. Amrita Sembhi (Locum physician for Parm Singh)
Dr. Parm Singh
Dr. Shivani Sritharan (Locum physician for Martha Carruthers)
Dr. Andrew Wayne (Locum physician for Ashley Zaretsky)
Dr. Jeff Weissberger
Dr. Yishai Wise
Dr. Ashley Zaretsky

Pharmacists

Christopher Chiu

Social Workers

Kim Hood
Brittany Marshall
Vanessa Perkins
Rhonda Pompillo

122 Cornell Park Ave

Monday - Thursday8:30AM - 4:30PM
Friday8:30AM - 3PM
Saturdayclosed
Sundayclosed
122 Cornell Park Ave
Unit #1
Markham ON
L6B 1B6
Phone
(905) 471-9999
Fax
(905) 209-1501
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122 Cornell Park Ave Staff & Practitioners

Nurses

Laura Jobin RPN
Claudia Paulas RPN

Nurse Practitioners

Shaindy Apelowicz
Joanna Cowley
Heather Olan

Physicians

Dr. Michelle Alexander
Dr. Isabel Alvarez
Dr. Lily Chen
Dr. Peter Haw
Dr. Lorraine Mingie
Dr. Deepti Pasricha
Dr. Jenova Reginold
Dr. Shintula Wijeyakulasingam

Clinical Program Manager

Lisa Ruddy

Chiropodist

Shirley Cheung

Registered Dietician

Nicole Jean-Pierre

Occupational Therapist

Jasdeep Chahal

381 Main Street North

Monday - Thursday9AM - 5PM
Friday9AM - 12PM
Saturdayclosed
Sundayclosed
381 Main Street North
Unit #1
Markham ON
L3P 1Z3
Phone
(905) 471-4795
Fax
(905) 471-4796
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381 Main Street North Staff & Practitioners

Nurse Practitioners

Shaindy Apelowicz

Physicians

Dr. Ron Esterbauer
Dr. Greg Um