Safety code for door opening
An approved window for egress has the following requirements: 

1st floor:
Clear opening width ≥ 20"
Clear opening height ≥ 24"
Minimum clear opening sq.ft. = 5.0 sq.ft.


So I believe this counts as approved egress. 

As for an egress door, this site explains that code dictates that you only need one:


  This is a question that get asked quite often and many people are surprised to find out there is only one required exit door in a single family home per the IRC. However, there are requirements this door must meet. It must be a side hinged door, a minimum size of 3 feet wide and 6 feet 8 inches tall. So that sliding door, NOPE it doesn't meet building code for an exit door.


In summary, as long as you have one door per code (3' wide hinged door), you are set in terms of exterior doors. Your sliding door won't count as an egress door, but should count as a means of egress in terms of a window (if needed...such as part of a bedroom).