With over 50 years of subspecialty experience, find the Orthopedic provider that is right for you, right here in Williston. Gregory A. Brown, MD, PhD Orthopaedic Surgery Greg Rennirt, MD Orthopedic Surgery Cherise Norby, APRN, FNP Orthopedic Surgery Specializing in total joint replacement. Specializing in sports injuries. Osteoporosis Clinic Now Open! We are proud to provide the quality care you need, close to home. No referral needed and same day appointments available. Call today! 701.774-7080 CHI St. Alexius Health. Williston With over 50 years of subspecialty experience , find the Orthopedic provider that is right for you , right here in Williston . Gregory A. Brown , MD , PhD Orthopaedic Surgery Greg Rennirt , MD Orthopedic Surgery Cherise Norby , APRN , FNP Orthopedic Surgery Specializing in total joint replacement . Specializing in sports injuries . Osteoporosis Clinic Now Open ! We are proud to provide the quality care you need , close to home . No referral needed and same day appointments available . Call today ! 701.774-7080 CHI St. Alexius Health . Williston