Harmless Acute Pancreatitis Score (HAPS)

Harmless Acute Pancreatitis Score (HAPS)

Rebound tenderness/guarding :
Creatinine :
Hematicrit :

The Harmless Acute Pancreatitis Score is used to predicts within 30 minutes of admission patients whose acute pancreatitis will run a mild course.

Formula :

Points are given for each variable.

Explanation of Result :

A score of 0 is associated with the absence of pancreatic necrosis (Balthazar score, 0–4 points), no need for dialysis or artificial ventilation, and no fatal outcome. 97% specificity and 98% positive predictive value.

* Please verify all calculations prior to clinical use.


  • Lankisch PG, Weber-Dany B, Hebel K, Maisonneuve P, Lowenfels AB. The harmless acute pancreatitis score: a clinical algorithm for rapid initial stratification of nonsevere disease. Clin Gastroenterol Hepatol. 2009 Jun;7(6):702-5; quiz 607. PMID: 19245846.