Aims: In this study, it is aimed to detect electrophysiological correlation of patients who were referred to TrakyaUniversity Medical Research Center Neurology Clinics Electromyography (EMG) lab in 2014 with Carpal Tunnel Syndrome (CTS) pre-diagnosis and grade them based on electrophysiological features.Methods: Electromyography (EMG) records of 174 patients who were sent to electromyography lab in 2014 withCarpal Tunnel Syndrome (CTS) pre diagnosis were scanned retrospectively. Patients were recorded with the data of gender and age. Correlation between pre diagnosis and electrophysiological diagnosis were reported statistically by using Kappa and McNemar tests. Patients were classified based on sex using Chi-square test. Number and percentages, arithmetic mean± standard deviation, median (minimum-maximum) were used as descriptive analysis. Results: Out of all electrophysiological diagnosis, 62 patients (35.6%) were consistent with pre diagnosis when 112(64.4%) were inconsistent. Out of patients who were diagnosed with Carpal Tunnel Syndrome (CTS) according to their electromyography (EMG) findings, 31 patients (48.4%) had mild syndrome.Conclusion: A big inconsistency between pre diagnosis and electromyography (EMG) results was detected. It isimportant to make a more careful and detailed examination to fix this problem