Introduction: To study usefulness of total creatine kinase (CK) as a screening tool in various neurological and psychiatric disorders in emergency setting of a tertiary care hospital. Materials and Methods: A 1-year retrospective study was conducted on 102 patients with complaints pertaining to neurological and psychiatric disorders in a tertiary neurosciences centre in a metropolitan city. Blood samples in plain vial were received in Emergency Laboratory and total CK levels were measured by automated analyzer and its correlation with various diseases was analyzed. Results: It was observed that CK activity was raised in various psychiatric conditions-acute transient psychotic disorder, alcohol dependence syndrome, delirium, psychosis, mental retardation, catatonia, bipolar affective disorder (BAD), depression and mania and also in neurological disorders-seizures, meningitis, myasthenia gravis (multiple sclerosis), Guillain-Barre syndrome, extra pyramidal syndrome, neuroleptic malignant syndrome and infarct. Conclusion: This study demonstrated that CK is a sensitive and an important screening parameter in diagnosis and monitoring of various neurological and psychiatric disorders in emergency setting. It is also helpful in identifying people at high risk for various neuro-psychiatric diseases.