2026 ICD-10-CM Diagnosis Code K11.23Chronic sialoadenitis

ICD-10-CM Codes›K00–K95›K00-K14›K11

ICD-10-CM K11.23
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K11.23 is a billable ICD-10-CM diagnosis code for chronic sialoadenitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 11 through 13, 154 through 156. Coders also document this condition as acute on chronic sialoadenitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury, Diseases of mouth; excluding dental, and Nontraumatic dental conditions.

Code Identity

ICD-10-CM Code
K11.23
Billable Status
Yes — Valid for Submission
Code Describes
Chronic sialoadenitis
Short Description
Chronic sialoadenitis
Same as the full description in the CMS dataset.
Parent Code
K11.2
Sialoadenitis

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK11Diseases of salivary glands
This CodeK11.23Chronic sialoadenitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute on chronic sialoadenitis
  • Acute sialoadenitis
  • Chronic sclerosing sialadenitis
  • Chronic sialadenitis
  • Immunoglobulin G4 related disease
  • Immunoglobulin G4 related submandibular gland disease
  • Sialoadenitis of the submandibular gland

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR DEN001
Any dental condition including traumatic injury
Default principal diagnosis: inpatient No · outpatient No
CCSR DIG003
Diseases of mouth; excluding dental
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR DEN002
Nontraumatic dental conditions
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Salivary Gland Disorders

Your salivary glands are in your mouth. You have three pairs of major salivary glands and hundreds of small (minor) glands. They make saliva (spit) and empty it into your mouth through openings called ducts. Saliva makes your food moist, which helps you chew and swallow. It helps you digest your food.

Read the full article at MedlinePlus

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

Convert K11.23 to ICD-9-CMHistory

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

ICD-9-CM
527.2 Sialoadenitis
Approximate The match is approximate rather than exact.

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 K11.23Overview

What is the ICD-10 code for chronic sialoadenitis?

The ICD-10-CM code for chronic sialoadenitis is K11.23 (sometimes written as K1123). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is K11.23 (Sialoadenitis) a billable code?

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

What MS-DRG does K11.23 group to?

When chronic sialoadenitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 11, 12, 13, 154, 155, 156, with relative weights from 0.6911 to 5.4541 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K11.23?

Under the General Equivalence Mappings, chronic sialoadenitis converts to ICD-9-CM 527.2 (sialoadenitis). The mapping is approximate, so confirm the match fits the documentation.