This is a PsA research clinic, and they will do a work up and give you a second opinion if you have --
1. A diagnosis of PsA from a rheumatologist
2. A referral (from the family doc is fine, doesn't have to be the rheumatologist)
3. An OHIP card (if you have to ask what an OHIP card is, you don't have one, LOL!)
Note for #2 -- if you are Canadian, but not living in Ontario, the clinic can accommodate you as well, with a couple of minor administrative tweaks.
After the second opinion, they will work with your rheumatologist on your treatment.
The clinic is run by the authors of
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=gladman+chandran+psoriatic
If you can't go to the clinic, at least get the book!
Here is all of the information you and your referring doctor need:
http://www.uhn.ca/Arthritis/PatientsFamilies/Clinics_Tests/Psoriatic_Arthritis/pages/about_us.aspx
Note that you can be referred by any doctor (like your GP) but you must have a diagnosis of PsA from a rheumatologist.