OBJECTIVES: To differentiate three types of Mechanical Neck Disorders (MND) by Current Perception Threshold (CPT). Specific aims were to: 1) Look whether differences in CPT exist in MND categories, and 2) Estimate the predicted  probability of the neurological symptoms in type-3 of MND. METHODS: The study design was a laboratory based cross-sectional discriminative analysis. Patients  with MND (N = 106) were assessed for CPT into three groups: MND-mixed (N=60), MND-2 (N=29), MND-3 (N=17). CPT testing was performed in a standard Quantatative Sensory Testing laboratory. A one-way ANOVA with post hoc was done for compare the mean CPT score between the groups. An independent sample t-test was done  to compare the mean CPT and  estimated effect size between MND-2 and MND-3 group. The discriminative analysis predicted the group membership in one of the categories. A binary logistic regression model predicted probability of higher CPT in MND-3, where CPT score counted as the risk factor to having neurological symptoms. A Receiver Operating Characteristic (ROC) curve was created from predicted probability by binary covariate. RESULTS: Mean CPT differed significantly across the three groups (F 2, 96 = 6.69, p = 0.002), with a significant higher preference rating in MND-3 (p = 0.004). Moderate discriminates and a small to medium effect size found between the  MND-2 and MND-3. Model discrimination (between MND-2 and MND-3) showed 86.2% specificity and 64.7% sensitivity, where an area under the ROC curve was 0.836 (95% CI = 0.716 - 0.956, p = 0.000). CONCLUSIONS: CPT test was capable of differentiate MND categories. CPT might be a potential  tool for evaluating  neurological involvement or hypersensitivity in  neck pain.