List of Quest Diagnostics Stores in Weslaco, TX Outlet Note Regular Brands Quest Diagnostics Texas Weslaco Rating 4.7 based on 66 votes Products STD Testing Clinical Laboratory Services Drug Test Blood Test NameAddressPhone Name/Address/Phone Quest Diagnostics outlet - Weslaco 1221 E 10th St, Ste A (956) 968-5386 People Also Viewed