Reading comprehension is one of the most valuable academic skills taught in school. Selecting the appropriate assessment instrument to ensure early identification and intervention is important as there is an amalgam of cognitive abilities and academic skills involved in reading comprehension. The GORT-5 is the most recent edition of a test that measures reading rate, accuracy, fluency, and comprehension among school-age children and young adults. The current study evaluated the concurrent validity of the GORT-5 with the WJ-IV ACH for a group of referred students. Findings indicate that Pearson correlation coefficients for all GORT-5 and WJ-IV ACH score comparisons were very large (0.70-0.89). Generally, GORT-5 scores were 2-3 points higher than WJ-IV ACH cluster scores. The diagnostic accuracy of the GORT-5 is excellent, with very few students' scores yielding a false negative.