2019 ICD-10-CM Diagnosis Code K13.21

Leukoplakia of oral mucosa, including tongue

    2016 2017 2018 2019 Billable/Specific Code
  • K13.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM K13.21 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of K13.21 - other international versions of ICD-10 K13.21 may differ.
Applicable To
  • Leukokeratosis of oral mucosa
  • Leukoplakia of gingiva, lips, tongue
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as K13.21. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • hairy leukoplakia (
    ICD-10-CM Diagnosis Code K13.3

    Hairy leukoplakia

      2016 2017 2018 2019 Billable/Specific Code
    K13.3
    )
  • leukokeratosis nicotina palati (
    ICD-10-CM Diagnosis Code K13.24

    Leukokeratosis nicotina palati

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Smoker's palate
    K13.24
    )
The following code(s) above K13.21 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to K13.21:
  • K00-K95
    2019 ICD-10-CM Range K00-K95

    Diseases of the digestive system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the digestive system
  • K13
    ICD-10-CM Diagnosis Code K13

    Other diseases of lip and oral mucosa

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Includes
    • epithelial disturbances of tongue
    Type 2 Excludes
    • certain disorders of gingiva and edentulous alveolar ridge (K05-K06)
    • cysts of oral region (K09.-)
    • diseases of tongue (K14.-)
    • stomatitis and related lesions (K12.-)
    Use Additional
    • code to identify:
    • alcohol abuse and dependence (F10.-)
    • exposure to environmental tobacco smoke (Z77.22)
    • exposure to tobacco smoke in the perinatal period (P96.81)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    Other diseases of lip and oral mucosa
  • K13.2
    ICD-10-CM Diagnosis Code K13.2

    Leukoplakia and other disturbances of oral epithelium, including tongue

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • carcinoma in situ of oral epithelium (D00.0-)
    • hairy leukoplakia (K13.3)
    Leukoplakia and other disturbances of oral epithelium, including tongue
Approximate Synonyms
  • Leukoplakia of gingiva
  • Leukoplakia of lip
  • Leukoplakia of lips
  • Leukoplakia of mucosa and tongue
  • Leukoplakia of oral mucosa
  • Mucosa and tongue leukoplakia
Clinical Information
  • A white patch or plaque on oral cavity mucosa that cannot be characterized clinically or pathologically as any other disease. The diagnosis of leukoplakia is one of exclusion; other conditions such as candidiasis, lichen planus, leukoedema, etc. Must be ruled out before a diagnosis of leukoplakia can be made. Leukoplakia may be a premalignant condition.
  • A white patch or plaque on oral mucosa that cannot be characterized clinically or pathologically as any other disease. The diagnosis of leukoplakia is one of exclusion; other conditions such as candidiasis, lichen planus, leukoedema, etc. Must be ruled out before a diagnosis of leukoplakia can be made. Leukoplakia may be a premalignant condition.
  • 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).
  • White patch seen on the oral mucosa; considered a premalignant condition and is often tobacco-induced.
ICD-10-CM K13.21 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 011 Tracheostomy for face,mouth & neck diagnoses or laryngectomy with mcc
  • 012 Tracheostomy for face,mouth & neck diagnoses or laryngectomy with cc
  • 013 Tracheostomy for face,mouth & neck diagnoses or laryngectomy without cc/mcc
  • 157 Dental and oral diseases with mcc
  • 158 Dental and oral diseases with cc
  • 159 Dental and oral diseases without cc/mcc

Convert K13.21 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
Code annotations containing back-references to K13.21:
  • Type 2 Excludes: K05.5
    , K14
    ICD-10-CM Diagnosis Code K05.5

    Other periodontal diseases

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Combined periodontic-endodontic lesion
    • Narrow gingival width (of periodontal soft tissue)
    Type 2 Excludes
    • leukoplakia of gingiva (K13.21)
    ICD-10-CM Diagnosis Code K14

    Diseases of tongue

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • erythroplakia (K13.29)
    • focal epithelial hyperplasia (K13.29)
    • leukedema of tongue (K13.29)
    • leukoplakia of tongue (K13.21)
    • hairy leukoplakia (K13.3)
    • macroglossia (congenital) (Q38.2)
    • submucous fibrosis of tongue (K13.5)
    Use Additional
    • code to identify:
    • alcohol abuse and dependence (F10.-)
    • exposure to environmental tobacco smoke (Z77.22)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)

Diagnosis Index entries containing back-references to K13.21:
  • Leukokeratosis - see also Leukoplakia
    • mouth K13.21
    • oral mucosa K13.21
    • tongue K13.21
  • Leukoplakia
    • buccal K13.21
    • gingiva K13.21
    • lip K13.21
    • mouth K13.21
    • oral epithelium, including tongue K13.21 (mucosa)
    • palate K13.21
    • tongue K13.21

ICD-10-CM Codes Adjacent To K13.21
K12.3 Oral mucositis (ulcerative)
K12.30 …… unspecified
K12.31 …… due to antineoplastic therapy
K12.32 …… due to other drugs
K12.33 …… due to radiation
K12.39 Other oral mucositis (ulcerative)
K13 Other diseases of lip and oral mucosa
K13.0 Diseases of lips
K13.1 Cheek and lip biting
K13.2 Leukoplakia and other disturbances of oral epithelium, including tongue
K13.21 Leukoplakia of oral mucosa, including tongue
K13.22 Minimal keratinized residual ridge mucosa
K13.23 Excessive keratinized residual ridge mucosa
K13.24 Leukokeratosis nicotina palati
K13.29 Other disturbances of oral epithelium, including tongue
K13.3 Hairy leukoplakia
K13.4 Granuloma and granuloma-like lesions of oral mucosa
K13.5 Oral submucous fibrosis
K13.6 Irritative hyperplasia of oral mucosa
K13.7 Other and unspecified lesions of oral mucosa
K13.70 Unspecified lesions of oral mucosa

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.