Yes, if you have a health issue it is possible that you are medically inadmissible to Canada. Medical inadmissibility comes about in one of two contexts:   The less common of these is medical inadmissibility that results from being assessed as a threat to the health of Canadians. This would be case for those afflicted with a communicable disease that poses a risk of proliferation within Canada. This is relatively rare as there are not many contagious illnesses or conditions that permanently affect one’s state of health. HIV and AIDS are examples of such a situation, and can be grounds for a determination of medical inadmissibility. More often than not, medical inadmissibility is determined by assessing how large a strain a particular individual would put on the Canadian healthcare system. If one’s state of health requires significant and frequent medical intervention, that individual can be found medically inadmissible. There are no strict criteria or guidelines as to what constitutes medical inadmissibility in this context as this determination is made on a case by case basis. However, the cost of any medication required and the frequency with which one must see a medical specialist are among the factors that are considered.