BACKGROUND This study was conducted to compare BISAP scoring system, Ranson’s score and CRP levels in predicting the clinical outcome in acute pancreatitis and for early detection of severity and organ failure in acute pancreatitis. METHODS This study was an observational longitudinal analytical study conducted among patients admitted with diagnosis of acute pancreatitis, in Father Muller Medical College Hospital, Mangalore, from November 2016 to March 2018. The study was started after obtaining ethical clearance from the institution’s ethical clearance committee. All patients diagnosed with acute pancreatitis between the age 20 and 60 years were included in the study. RESULTS Comparison of serum CRP levels between the Atlanta classified groups shows that severe group has the maximum value of 340.966 and mild has the minimum value of 55.38. This difference is statistically significant with a test value of 16.543 and a P value of < 0.001. On comparison of the test group, Ranson’s score with the BISAP score, the test group had a sensitivity of 89.3 % and specificity of 77.3 %. CONCLUSIONS The study has demonstrated the concordance between Ranson’s score, BISAP score and serum CRP level as predictors of clinical outcome in acute pancreatitis. KEY WORDS Acute Pancreatitis, Clinical Outcome, C Reactive Protein, Scoring Systems.