Timothy S. Johnston, M.D. and Associates Return to Central California Businesses Directory Timothy S. Johnston, M.D. and Associates Claim Listing Return to Central California Businesses Directory Description Details Address 3349 G St. # F City Merced State California ZIP Code 95340 Phone 209-349-8459 Listing Category Family Practice Doctor - Listings Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?