You can substantially reduce your parking costs at the Ottawa Hospital. Check out this link   http://www.ottawahospital.on.ca/en/patients-visitors/directions-maps/parking/

It provides detailed information on parking rates. Below is an excerpt from the above web page.

Day pass (purchase at pay station only)	$13.00
Pass for 7 consecutive days	$45.25
Pass for 30 consecutive days	$92.00
Pass for 5 non-consecutive days	$32.50
Pass for 10 non-consecutive days	$65.00
Pass for 15 non-consecutive days	$97.50
Pass for 30 non-consecutive days	$195.00

If you need to go to a clinic weekly, purchasing a non-consecutive days pass will reduce your parking costs from $13 to $6.50 per visit, a 50% savings!