Can US Medicare premiums be claimed as a medical expense deduction on Canadian Income Tax?

[TurboTaxBrenda1]

No, as per CRA- 

Report online 11500 of your return the full amount, in Canadian dollars, of your U.S. Social Security benefits and any U.S. Medicare premiums paid on your behalf. You can claim a deduction for part of this income. See Line 25600.

Use the Bank of Canada exchange rate in effect on the day you received the pension. If you received the pension at different times during the year, use the average annual rate. The average monthly rate and the daily rate are available by visiting the Bank of Canada website.