2026 ICD-10-CM Diagnosis Code K86.9Disease of pancreas, unspecified

ICD-10-CM Codes›K00–K95›K80-K87›K86

ICD-10-CM K86.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K86.9 is a billable ICD-10-CM diagnosis code for disease of pancreas, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 438 through 440. Coders also document this condition as cystic fibrosis of pancreas. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pancreatic disorders (excluding diabetes).

Code Identity

ICD-10-CM Code
K86.9
Billable Status
Yes — Valid for Submission
Code Describes
Disease of pancreas, unspecified
Short Description
Disease of pancreas, unspecified
Same as the full description in the CMS dataset.
Parent Code
K86
Other diseases of pancreas

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK80-K87Disorders of gallbladder, biliary tract and pancreas
CategoryK86Other diseases of pancreas
This CodeK86.9Disease of pancreas, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cystic fibrosis of pancreas
  • Diabetes mellitus associated with pancreatic disease
  • Disorder of pancreas
  • Exocrine pancreatic manifestation co-occurrent and due to cystic fibrosis
  • Impaired glucose tolerance associated with pancreatic disease
  • Pancreatic duct disorder
  • Panniculitis due to action of lipolytic enzymes
  • Panniculitis secondary to pancreatic disease
  • Pleural effusion due to another disorder
  • Pleural effusion due to disorder of pancreas

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Disease, diseased
      • pancreas

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DIG020
Pancreatic disorders (excluding diabetes)
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Pancreatic Diseases

The pancreas is a gland behind your stomach and in front of your spine. It produces juices that help break down food and hormones that help control blood sugar levels. Problems with the pancreas can lead to many health problems. These include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert K86.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
577.9 Pancreatic disease NOS
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K86.9Overview

Is K86.9 (Other diseases of pancreas) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disease of pancreas, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K86.9 group to?

When disease of pancreas, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 438, 439, 440, with relative weights from 0.6214 to 1.6302 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K86.9?

Under the General Equivalence Mappings, disease of pancreas, unspecified converts to ICD-9-CM 577.9 (pancreatic disease NOS). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.