Trauma in India is a significant social and financial burden which requires prioritized attention. The death rate ought to be reduced with better organized systems of trauma care. The need for a scoring system to assess the severity of injuries in poly–trauma patients continues to be a challenge. An accurate scoring system is hence required to predict the morbidity and survival rate in a triage setting. The Injury Severity Score (ISS) does not take into scoring the multiple injuries in the same body region, whereas a New Injury Severity Score (NISS) may prove to provide a more accurate measure of trauma severity by considering the patient‘s three greatest injuries irrespective of the body region. This study proves that NISS score often increases the apparent injury severity and is a better tool for prediction of short–term mortality.