UCHealth Family Medicine - Littleton. 206 W. County Line Road Suite 300 Highlands Ranch, CO 80129. 303.795.5980. 303.795.7881. Schedule online. ×. We are open and look forward to seeing you. Please stop and schedule a Virtual Visit visit if ANY of these apply to you: International travel in the last 30 days.Find a Doctor‧View All 7 Providers‧Kari Barton, MD.