Patient Portal; Home/ Locations/ Our Locations/ Northwest Medical Plaza - Pinnacle ... Northwest Medical Plaza - Pinnacle 2000 S 42nd St. | Suite 100 Rogers, AR 72758 Phone: (479) 273-9173 Fax: (479) 464-9989 Directions. Hours: Monday - Friday: 8 a.m. - 5 p.m. Walk-in Clinic Hours:.