Background: The success of Mohs micrographic surgery (MMS) depends partly on the correct diagnosis of slides.
Objectives: To determine reliability of diagnosis from Mohs slides.
Methods: This was a prospective study evaluating the reliability of diagnosis from Mohs slides of basal cell carcinoma (BCC) presence, BCC location on the slide and BCC subtype among six raters who independently assessed 50 Mohs slides twice with a 2-month interval.