Ralph P. Diaz, MD All Business Listings Return to Directory Ralph P. Diaz, MD Listed in Allergy and Immunology - Listings 7471 N Fresno St 93720 (559) 436-4500 Claim Listing Flag ListingReturn to Directory Overview Map & Directions Contact/Other Phone (559) 436-4500Listing Category Allergy and Immunology - Listings Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?