One of the best doctors I have even been to. So thorough, thoughtful and didn’t rush one bit. I would recommend Dr. Called to anyone.

Submitted Oct. 17, 2023

Dr. Callen has been our daughter Neurologist for over 14 years. He has been amazing. We are very sad we have to leave when our daughter turns 18. Best Neuro in Canada!

Submitted Oct. 4, 2023

Failed to diagnose strokes in my baby and provide adequate treatment. Despite several other neurologists' proper diagnoses, refuses to correct his error in my son's documentation.
Failed to create his own opinion, influenced by the McMaster SCAN team, namely dr.Kathleen Nolan.
Medicalkidnappingontario.ca

Submitted May 30, 2023

Dr. David Callen is a wonderful Doctor and compassionate human being. He takes his time answering any questions and explains things carefully. It is evident he truly cares for his patients and families and is passionate for what he does. Excellent Doctor.

Submitted Feb. 9, 2023

Extremely compassionate doctor. My newborn baby suffered a stroke causing brain damage and Dr Callen was so gentle and empathetic while explaining to us the diagnosis. Every concern is met and he is very knowledgeable in his field. Dr Callen spends the time to answer any questions you may have.

Submitted Jan. 27, 2023

He is excellent as a doctor, as a health professional and as a human being. By talking to him you can see his extensive knowledge and experience in his field. You can also see the love and professionalism for what he does. On top of all he is a great human being who takes the time to patiently listen to your concerns. He delves into the case with skill and genuine interest. I felt very comfortable and respected talking to him. As a mother, it is important to have a pediatrician who listens to your concerns, because I believe that it is common and normal to be concerned about the well-being of your baby in cases like these.

Submitted April 4, 2022

Dr Callen recently provide my valley with devastating news of a baby who would never a life past that of a babies abilities. I am a nurse of 25 years and have never seen a doctor show such compassion and empathy. His ability to explain to our family what happened to our beautiful baby, was like nothing I have ever seen. He answered every question without hesitation. As a nurse I found my heart ache for him having to provide the parents with this debstating information. He was truely an angel on a dark day.

Submitted April 21, 2021

Dr. Callen is my son's neurologist and he is absolutely fantastic. So thorough, very patient, knowledgeable, kind and very supportive. No question is dumb. He takes the time to listen to address your concerns and never rushes you. I highly recommend him.

Submitted Oct. 1, 2019

I went to Medical School with Dr. Callen and he is top notch.

Submitted Sept. 27, 2019

Very professional and soft spoken, makes you feel like your concerns are met with wisdom and knowledge and hope.

Submitted Dec. 28, 2018