K86.1Other chronic pancreatitis

K86.1 is the ICD-10-CM diagnosis code for other chronic pancreatitis. It belongs to category K86 (other diseases of pancreas), block K80-K87 (disorders of gallbladder, biliary tract and pancreas) and chapter 11 (diseases of the digestive system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within K86, choose K86.1 (Other chronic pancreatitis) only when documentation doesn't support a more specific option: alcohol-induced chronic pancreatitis (K86.0), cyst of pancreas (K86.2), pseudocyst of pancreas (K86.3), other specified diseases of pancreas (K86.8) and disease of pancreas, unspecified (K86.9).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 438 (Disorders of Pancreas Except Malignancy with MCC, relative weight 1.5765), DRG 439 (Disorders of Pancreas Except Malignancy with CC, relative weight 0.8402) and DRG 440 (Disorders of Pancreas Except Malignancy without CC/MCC, relative weight 0.5965), in MDC 07 (Diseases and Disorders of the Hepatobiliary System and Pancreas), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 577.1 (chronic pancreatitis) and 577.8 (other specified diseases of pancreas).