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    v1.0.28
    OpenPayerBilling CodesDisorders of gallbladder, biliary tract and pancreasICD-10-CM k85-acute-pancreatitis
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    ICD-10-CM Code For Acute Pancreatitis: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group K85 includes acute inflammation of the pancreas and related subtypes such as biliary, alcoholic, drug-induced, and idiopathic acute pancreatitis, as well as codes for pancreatitis with necrosis or systemic complications. These ICD-10-CM diagnosis codes are used to document inpatient and outpatient encounters where acute pancreatic inflammation, its etiology, severity, and complications are clinically relevant, capturing disease severity, organ involvement, or clinical complexity relevant to this group. Accurate coding within the ICD-10-CM K85 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM K85: Acute Pancreatitis Overview

    The ICD-10-CM K85 code group represents acute inflammation of the pancreas and related clinical presentations affecting the pancreatic and peripancreatic tissues. These diagnoses target the pancreatic exocrine organ system and associated complications such as necrosis or organ failure. Accurate coding matters for appropriate service-level reimbursement and to ensure clinical records reflect disease severity and resource use.

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    When to Use

    Use a code from this group when a patient presents with a clinically documented diagnosis of acute pancreatitis, including documented etiology or complications such as necrosis, organ failure, or systemic inflammatory response. Select the most specific code available to reflect the underlying cause and severity documented in the medical record.

    ICD-10-CM Codes

    18 rows

    ICD-10-CM CodeDescription
    K85.00Idiopathic acute pancreatitis without necrosis or infection
    K85.01Idiopathic acute pancreatitis with uninfected necrosis
    K85.02Idiopathic acute pancreatitis with infected necrosis
    K85.10Biliary acute pancreatitis without necrosis or infection
    K85.11Biliary acute pancreatitis with uninfected necrosis
    K85.12Biliary acute pancreatitis with infected necrosis
    K85.20Alcohol induced acute pancreatitis without necrosis or infection
    K85.21Alcohol induced acute pancreatitis with uninfected necrosis
    K85.22Alcohol induced acute pancreatitis with infected necrosis
    K85.30Drug induced acute pancreatitis without necrosis or infection
    K85.31Drug induced acute pancreatitis with uninfected necrosis
    K85.32Drug induced acute pancreatitis with infected necrosis
    K85.80Other acute pancreatitis without necrosis or infection
    K85.81Other acute pancreatitis with uninfected necrosis
    K85.82Other acute pancreatitis with infected necrosis
    K85.90Acute pancreatitis without necrosis or infection, unspecified
    K85.91Acute pancreatitis with uninfected necrosis, unspecified
    K85.92Acute pancreatitis with infected necrosis, unspecified

    DRG Codes

    5 rows

    DRG CodeDescription
    438Disorders of Pancreas Except Malignancy with MCC
    439Disorders of Pancreas Except Malignancy with CC
    440Disorders of Pancreas Except Malignancy without CC/MCC
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems

    Typical Clinical Scenarios

    • A middle-aged patient presents to the emergency department with sudden onset severe epigastric pain radiating to the back, nausea, vomiting, and markedly elevated serum lipase and amylase. Imaging (CT abdomen) shows pancreatic inflammation without organ failure or local complications; the history is notable for recent heavy alcohol use. A diagnosis from this group is assigned to characterize an acute alcohol-related episode of pancreatic inflammation. Typical codes: K85.01, K85.11
    • An older adult is admitted urgently with persistent severe abdominal pain, fever, hypotension, and increasing creatinine; CT demonstrates pancreatic necrosis with infected peripancreatic fluid collections and evidence of multi-organ dysfunction requiring critical care support. A code from this group is used to document severe necrotizing acute pancreatitis as the primary reason for hospitalization and to guide clinical severity and resource use tracking. Typical codes: K85.21, K85.31
    • A patient with known gallstones develops biliary obstruction and presents with acute onset epigastric pain and elevated pancreatic enzymes shortly after an ERCP procedure; imaging confirms edematous pancreatitis without necrosis. A diagnosis from this group is assigned to capture acute biliary (gallstone- or procedure-related) pancreatitis as a complication of biliary disease or intervention. Typical codes: K85.00, K85.10

    Related Codes

    K80-CHOLELITHIASIS-GALLSTONE-DISEASE

    ICD-10-CM Code For Cholelithiasis: Group Overview

    K81-CHOLECYSTITIS

    ICD-10-CM Code For Cholecystitis: Group Overview

    K82-OTHER-DISEASES-OF-GALLBLADDER

    ICD-10-CM Code For Other Diseases Of Gallbladder: Group Overview

    K83-OTHER-DISEASES-OF-BILIARY-TRACT

    ICD-10-CM Code For Other Diseases Of Biliary Tract: Group Overview

    K86-OTHER-DISEASES-OF-PANCREAS

    ICD-10-CM Code For Other Diseases Of Pancreas: Group Overview

    K87-GALLBLADDER-BILIARY-TRACT-PANCREAS-DISORDERS

    ICD-10-CM Code For Disorders Of Gallbladder Biliary Tract And Pancreas In Diseases Classified Elsewhere: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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