Office and Locations to Provide the Best Patient Care. Schedule an Appointment Today. Outpatient Locations. Center for Spine & Orthopedics. CSO Main Office. 9005 Grant Street Ste 200. Thornton, CO 80229. Phone: 303.287.2800. Northern Colorado.Our Providers‧Conditions & Services‧Patients & Visitors‧News & Events‧About‧Professional Descriptions.