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  6. 2024 ICD-10-CM Code K13.21

2024 ICD-10-CM Diagnosis Code K13.21

Leukoplakia of oral mucosa, including tongue

ICD-10-CM Code:
K13.21
ICD-10 Code for:
Leukoplakia of oral mucosa, including tongue
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Diseases of the digestive system
    (K00–K95)
    • Diseases of oral cavity and salivary glands
      (K00-K14)
      • Other diseases of lip and oral mucosa
        (K13)

K13.21 is a billable diagnosis code used to specify a medical diagnosis of leukoplakia of oral mucosa, including tongue. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Dysplastic oral leukoplakia
  • Homogenous oral leukoplakia
  • Hyperplasia of gingiva
  • Leukoplakia
  • Leukoplakia of buccal mucosa
  • Leukoplakia of gingiva
  • Leukoplakia of lips
  • Leukoplakia of oral mucosa
  • Leukoplakia of oral mucosa and tongue
  • Leukoplakia of tongue
  • Leukoplakia of tongue
  • Leukoplakia of tongue
  • Leukoplakia of tongue associated with HIV disease
  • Oral leukoplakia caused by sanguinarine
  • Oral syphilis
  • Palmoplantar keratoderma with leukoplakia
  • Proliferative verrucous oral leukoplakia
  • Speckled oral leukoplakia
  • Syphilitic leukoplakia of tongue
  • Syphilitic oral leukoplakia
  • Ulcerated oral leukoplakia
  • Verrucous oral leukoplakia

Clinical Classification

Clinical CategoryCCSR Category CodeInpatient Default CCSROutpatient Default CCSR
Any dental condition including traumatic injuryDEN001N - Not default inpatient assignment for principal diagnosis or first-listed diagnosis.N - Not default outpatient assignment for principal diagnosis or first-listed diagnosis.
Diseases of mouth; excluding dentalDIG003Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.
Nontraumatic dental conditionsDEN002N - Not default inpatient assignment for principal diagnosis or first-listed diagnosis.N - Not default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

  • Leukoplakia

    a white patch lesion found on a mucous membrane that cannot be scraped off. leukoplakia is generally considered a precancerous condition, however its appearance may also result from a variety of hereditary diseases.

  • Leukoplakia, Hairy

    epithelial hyperplasia of the oral mucosa associated with epstein-barr virus (herpesvirus 4, human) and found almost exclusively in persons with hiv infection. the lesion consists of a white patch that is often corrugated or hairy.

  • Leukoplakia, Oral

    a white patch seen on the oral mucosa. it is considered a premalignant condition and is often tobacco-induced. when evidence of epstein-barr virus is present, the condition is called hairy leukoplakia (leukoplakia, hairy).

  • Leukoplakia of Buccal Mucosa

    a clinical term that indicates the presence of a white patch on the buccal mucosa in the mouth which cannot be characterized as any other disease. it may be a precancerous condition and in most cases histologic examination reveals keratosis.

  • Speckled Oral Leukoplakia

    non-homogenous leukoplakia on the oral mucosa. it is associated with a high risk for malignant transformation.

  • Palmoplantar Keratoderma with Leukoplakia

    a hereditary syndrome this is characterized by palmoplantar keratoderma accompanied by leukoplakia and may be associated with a high lifetime risk of esophageal cancer, as seen in howel-evans syndrome.

  • Hairy Leukoplakia of Tongue

    an epithelial hyperplasia on the surface of the tongue associated with epstein-barr virus and found almost exclusively in persons with hiv infection. the lesion consists of a white patch that is often corrugated or hairy.

  • Leukoplakia of Tongue

    a clinical term that indicates the presence of a white patch on the surface of the tongue which cannot be characterized as any other disease. it may be a precancerous condition and in most cases histologic examination reveals keratosis.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Leukokeratosis of oral mucosa
  • Leukoplakia of gingiva, lips, tongue

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • hairy leukoplakia K13.3
  • leukokeratosis nicotina palati K13.24

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert K13.21 to ICD-9-CM

  • ICD-9-CM Code: 528.6 - Leukoplakia oral mucosa
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

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.