Canadian number for US cell phone for dealing with medical establishment?

I'm a Canadian living in the US, who only has a US phone. Unfortunately I have an elderly and terminally ill family member in Canada. In addition to frequent visits, I'm now having to step in to help organize and advocate for his care. My US phone number seems to be a barrier in terms of accessing medical and social services offices. The office where he gets primary care outright blocks my phone, and other organizations where I have left messages have not responded, presumably due to it being an international number. In the US, we have Google Voice that will allow us to obtain a phone number from a particular area code - and that number can be used for sending and receiving calls and texts. Please recommend a similar service for Canada. I could buy a second SIM card or a cheap Canadian phone, but I'd prefer a virtual service that I can get set up right away, use from both the US and Canada, and can easily cancel when no longer needed. Thanks in advance!