Dr. Kenneth Sekine Dr. Todd Rasner Dr. Mitzi Brock ... Patient Portal. News. Testimonials. Careers. Mandarin Office (Main) 11945 San Jose Blvd, Building 400 Jacksonville, FL 32223 Phone: 904.262.5333. Bartram Park Office 13241 Bartram Park Blvd, Building 2201 ... Sekine Rasner and Brock MD PA ....