You are considered a new patient if this will your first visit with us, or if it has been more than 3 years since you have seen an Austin Gastro physician. North Offices. (Cedar Park, Georgetown, Northwest/Shoal Creek, Round Rock - all 3) (512) 244-2273. Central Offices. (Bailey Square, Manor, St. David's Plaza, Westlake) (512) 454-4588..