In simple words: This code indicates a sudden inflammation of the pancreas with tissue damage and infection, where the cause is unknown.

Idiopathic acute pancreatitis with infected necrosis is a severe form of acute pancreatitis characterized by inflammation and necrosis (tissue death) within the pancreas, which has become infected.The term "idiopathic" signifies that the underlying cause of the pancreatitis is unknown.

Example 1: A 45-year-old patient presents with severe abdominal pain, nausea, and vomiting. Blood tests reveal elevated pancreatic enzymes, and imaging confirms acute pancreatitis with infected necrosis. No clear cause (gallstones, alcohol use, etc.) is identified, thus leading to the diagnosis of idiopathic acute pancreatitis with infected necrosis (K85.02)., A patient with a history of recurrent acute pancreatitis is admitted to the hospital with severe abdominal pain and fever. Imaging studies reveal pancreatic necrosis with evidence of infection. After extensive evaluation, no definitive cause for the pancreatitis is found, resulting in the coding of K85.02., A 30-year-old patient experiences sudden onset of severe epigastric pain radiating to the back, along with vomiting and fever.Diagnostic tests reveal elevated lipase and amylase, confirming acute pancreatitis. A CT scan shows infected necrosis of the pancreas.Despite a thorough investigation, no specific cause is identified, so the condition is coded as K85.02.

Documentation for K85.02 should include:* Detailed clinical findings (abdominal pain, nausea, vomiting, fever).* Laboratory results demonstrating elevated pancreatic enzymes.* Imaging studies confirming acute pancreatitis and the presence of infected necrosis (e.g. CT scan, MRI).* Documentation that confirms no other causes were found for pancreatitis despite complete work up.