K85.91 Acute pancreatitis with uninfected necrosis, unspecified

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

Applies from K85 Acute pancreatitis

Includes

• acute (recurrent) pancreatitis
• subacute pancreatitis

Applies from K85.9 Acute pancreatitis, unspecified

Applicable to

• Pancreatitis NOS

MS-DRG index

Defines the logic of DRG(s) 438-440 in MDC 07.

Approximate ICD-9-CM (GEMs)

• 577.0 Acute pancreatitis (approximate)

Code annotations containing back-references to K85.91

Back-references to K85

• Code First: E08 Diabetes mellitus due to underlying condition ("pancreatitis and other diseases of the pancreas (K85-K86.-)")

Diagnosis Index entries for K85.91

• Pancreatitis (annular) (apoplectic) (calcareous) (edematous) (hemorrhagic) (malignant) (subacute) (suppurative) › with necrosis (uninfected)
• Pancreatitis (annular) (apoplectic) (calcareous) (edematous) (hemorrhagic) (malignant) (subacute) (suppurative) › acute (without necrosis or infection) › with necrosis (uninfected)

Nearby codes

• K85.80 Other acute pancreatitis without necrosis or infection
• K85.81 Other acute pancreatitis with uninfected necrosis
• K85.82 Other acute pancreatitis with infected necrosis
• K85.9 Acute pancreatitis, unspecified
• K85.90 Acute pancreatitis without necrosis or infection, unspecified
• K85.91 Acute pancreatitis with uninfected necrosis, unspecified (this code)
• K85.92 Acute pancreatitis with infected necrosis, unspecified