There is a really good guy at CMQ but I can't remember his name. Write to Pam. She'll give you the skinny.
Edited to add that I was going through some old paperwork this morning and found the information on the dermatologist I saw in PV:
Dr. Eduardo Cervantes
CMQ, Basilio Badillo #365
Telephone: 223-0011 / 222-5119
As I recall, his chairside manner wasn't that great but he knows his stuff!