2026 ICD-10-CM Diagnosis Code K13.29Other disturbances of oral epithelium, including tongue

ICD-10-CM Codes›K00–K95›K00-K14›K13

ICD-10-CM K13.29
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K13.29 is a billable ICD-10-CM diagnosis code for other disturbances of oral epithelium, including tongue. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 157 through 159. Coders also document this condition as disturbance of oral epithelium. 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
K13.29
Billable Status
Yes — Valid for Submission
Code Describes
Other disturbances of oral epithelium, including tongue
Short Description
Other disturbances of oral epithelium, including tongue
Same as the full description in the CMS dataset.
Parent Code
K13.2
Leukoplakia and other disturbances of oral epithelium, including tongue

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK13Other diseases of lip and oral mucosa
This CodeK13.29Other disturbances of oral epithelium, including tongue

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disturbance of oral epithelium
  • Erythroleukoplakia of internal part of mouth
  • Erythroplakia of mouth
  • Erythroplakia of tongue
  • Focal epithelial hyperplasia of mouth
  • Focal epithelial hyperplasia of tongue
  • Leukedema of mouth
  • Leukedema of tongue

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Erythroplakia of mouth or tongue
  • Focal epithelial hyperplasia of mouth or tongue
  • Leukoedema of mouth or tongue
  • Other oral epithelium disturbances

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.

    • Disturbance(s)
      • keratinization NEC
        • oral (mucosa) (soft tissue)
    • Disturbance(s)
      • keratinization NEC
        • tongue
    • Disturbance(s)
      • oral epithelium, including tongue NEC
    • Erythroplakia, oral epithelium, and tongue
    • Hyperplasia, hyperplastic
      • epithelial
        • focal, oral, including tongue
    • Hyperplasia, hyperplastic
      • epithelial
        • tongue
    • Ichthyosis(congenital)
      • lingual
    • Leukoedema, oral epithelium
    • Lingua
      • tylosis
    • Plaque(s)
      • tongue
    • Psoriasis
      • buccal
    • Psoriasis
      • mouth
    • Tylosis(acquired)
      • buccalis
    • Tylosis(acquired)
      • linguae
    • White
      • patches of mouth

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

Mouth Disorders

Your mouth is one of the most important parts of your body. It has many different functions. It allows you to:

Read the full article at MedlinePlus

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

Convert K13.29 to ICD-9-CMHistory

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

ICD-9-CM
528.79 Dist oral epithelium NEC
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 K13.29Overview

Is K13.29 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other disturbances of oral epithelium, including tongue on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K13.29 group to?

When other disturbances of oral epithelium, including tongue is the principal diagnosis on an inpatient stay, it groups to MS-DRG 157, 158, 159, with relative weights from 0.7085 to 1.7168 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K13.29?

Under the General Equivalence Mappings, other disturbances of oral epithelium, including tongue converts to ICD-9-CM 528.79 (dist oral epithelium NEC). 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.