I’ve already registered online for my K1 Visa Medical Exam at SLEC, does this guarantee me an appointment? Posted on August 24, 2014August 24, 2014 by Mrs. Presson The online registration at St. Luke’s Medical Center Extension Clinic (SLEC) does not guarantee you an appointment slot. It is “First Come, First Serve”. The online registration only takes out the hassle of filling up forms and registering on-site. You will still have to line up in the wee hours of the morning outside of…