Background: The aim of this study was to evaluate mainly the relation between the preliminary suspected clinical diagnosis and the results of the electroneuromyography (ENMG) examinations of the patients whom were referred to ENMG laboratory. We also evaluated the demographic features, complaints, and concomitant diseases of patients referred to our ENMG laboratory from various hospitals and clinics.,Method: A total of three hundred thirty-three patients referred to the ENMG laboratory of the Zonguldak Karaelmas University Neurology Department were included into study. Demographic features, neurological and other physical symptoms, suspected clinical diagnosis and result of electrophysiological examination of all patients were recorded.,Result: Two hundred thirty patients were female and one hundred three patients were males. The mean age was 50.7 +/- 12.3 years. The most common recorded diseases were hypertension (31.8%), diabetes mellitus (18.9%) and thyroid function disorders (11.4 %). History of alcohol intake was recorded in 9 % and smoking, in 36 % of patients. ENMG request was made by various specialists; Neurology, Orthopedics, Neurosurgery, Physical Treatment and Rehabilitation. ENMG abnormalities were found in 66.4 % of examined patients and carpal tunnel syndrome was the most common diagnosis (45.6 %). Consistency between the preliminary diagnosis and actual diagnosis was 63.4 % in carpal tunnel syndrome (CTS) subgroup, however it was 7.7 % for brachial plexopathy.,Conclusion: ENMG investigation continues to play an important role in the differential diagnosis of peripheral nerve diseases. Clinicians should remember that ENMG is an expensive, invasive and uncomfortable test. It also requires a very long time. Paying more attention in history-taking and neurological examination for patients referred to ENMG laboratory by the physician will increase the preliminary diagnosis-diagnosis consistency. This Study also emphasizes that better known and more seen diseases such as CTS are suggested more correctly by all the referral physicians then diseases with complex semiology and neurologic examination such as brachial plexopathy.