2026 ICD-10-CM Diagnosis Code K11.20Sialoadenitis, unspecified

ICD-10-CM Codes›K00–K95›K00-K14›K11

ICD-10-CM K11.20
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K11.20 is a billable ICD-10-CM diagnosis code for sialoadenitis, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 154 through 156. 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
K11.20
Billable Status
Yes — Valid for Submission
Code Describes
Sialoadenitis, unspecified
Short Description
Sialoadenitis, unspecified
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 CodeK11.20Sialoadenitis, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Allergic parotitis
  • Cervical lymphadenitis
  • Head and neck lymphadenopathy
  • Infectious sialoadenitis of major salivary gland
  • Infective sialoadenitis
  • Obstruction of salivary duct
  • Obstructive sialadenitis
  • Obstructive sialoadenitis of major salivary gland
  • Parotitis
  • Parotitis - non-mumps
  • Recurrent parotitis
  • Sialoadenitis
  • Sialoadenitis of minor salivary gland
  • Sialoadenitis of the sublingual gland
  • Sialoadenitis of the submandibular gland
  • Sialodochitis
  • Sialodochitis fibrinosa
  • Submandibular lymphadenitis
  • Submandibular lymphadenopathy
  • Suppurative parotitis
  • Toxic parotitis

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.

    • Sialoadenitis(any gland) (periodic) (suppurative)

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

Clinical InformationClinical

  • Mumps

    an acute infectious disease caused by rubulavirus, spread by direct contact, airborne droplet nuclei, fomites contaminated by infectious saliva, and perhaps urine, and usually seen in children under the age of 15, although adults may also be affected. (from dorland, 28th ed)

  • Parotitis

    inflammation of the parotid gland.

  • Rubulavirus

    a genus of the family paramyxoviridae (subfamily paramyxovirinae) where all the species have hemagglutinin and neuraminidase activities but lack a c protein. mumps virus is the type species.

  • Mumps|Epidemic Parotitis|Epidemic Parotitis

    a contagious viral infection caused by the mumps virus. symptoms include swollen and tender parotid glands, fever, muscle aches and fatigue. due to vaccination programs, mumps has become a rare disease.

  • Parotitis

    inflammation of the parotid glands.

  • Suppurative Parotitis

    parotitis that is caused by a bacterial agent.

  • Submandibular Lymphadenitis

    inflammation of the submandibular lymph nodes.

  • Cervical Lymphadenitis

    inflammation of the cervical lymph nodes.

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 K11.20 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 K11.20Overview

Is K11.20 (Sialoadenitis) a billable code?

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

What MS-DRG does K11.20 group to?

When sialoadenitis, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 154, 155, 156, with relative weights from 0.6911 to 1.5635 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K11.20?

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

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.