Say you're traveling to some other city this week, but when you arrive you find yourself in urgent need of a doctor's care. Unless you know someone in the region, you're going to be stuck going online hoping and praying some MD can find time to see you, right?

That's what ZocDoc hopes to alleviate.

The free service allows people to find a doctor's real-time availability by going online, and today ZocDoc begins offering its services to those who may be in urgent need of a doctor in the Tampa Bay area (Officials with ZocDoc say they don't give out specifics on the exact number of doctors available in a region).

Tampa is the 18th city in the country to be serviced by ZocDoc.

It won't help you, however, if you're uninsured.