Mission Viejo - Urgent Care. Address. 26800 Crown Valley Pkwy., Suite 150 Mission Viejo, CA 92691 Driving Directions. Hours. Mon - Sat: 8 a.m. - 8 p.m. ... Introducing MyChart, your new patient portal. MyChart makes it easy to get care and manage your health including checking in for your next appointment. Sign Up for MyChart Login to MyChart.