His name is Dr. Adrian Santana and you can find him at the Hotel Marquez, #75 Calle Filipinas. Turn left right after the OXO store at the entrance to Barra, go two blocks down to the hotel on the left. There's a restaurant, Sr. Froy's, on the right.
His number is 045-331-382-9177. He speaks English and you can park in the hotel parking lot. He charges $400 pesos for an hour and a half treatment. The room is spacious, clean, quiet and cool. I've never had anyone so good and believe me, I've gone to many Dr.'s here.