San Marcos Office Location | Appointment Request | Post-Appointment Survey San Marcos Dental Office Karina A. Gregg, DDS San Elijo Dental Address: 1691 Melrose Drive #160 San Marcos, CA 92078 Phone: (760) 798-0828 Email: Office Hours: Monday: 9:00am to 6:00pm Tuesday: 9:00am to 6:00pm Wednesday: 9:00am to 6:00pm Thursday: 9:00am to 6:00pm Friday: 9:00am to 6:00pm View Larger Map Back to Top