DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

K13 Other diseases of lip and oral mucosa

  • Header · not billable

K13 is not billable. The category heads 13 billable codes in FY2027, grouped under 8 subdivisions.

Index → code

Where it sits

  1. Chapter 11 Diseases of the digestive system (K00-K95)
  2. K00-K14 Diseases of oral cavity and salivary glands (K00-K14)
  3. K13 Other diseases of lip and oral mucosa
Billable codes
13
Subdivisions
8
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
92

Codes in K13

  1. K13.0
    Diseases of lips
    Billable
    Inclusion terms 11, Excludes1 6

    Inclusion terms

    • Abscess of lips
    • Angular cheilitis
    • Cellulitis of lips
    • Cheilitis NOS
    • Cheilodynia
    • Cheilosis
    • Exfoliative cheilitis
    • Fistula of lips
    • Glandular cheilitis
    • Hypertrophy of lips
    • Perlèche NEC

    Excludes1

    • ariboflavinosis (E53.0) E53.0
    • cheilitis due to radiation-related disorders (L55-L59) L55 L59
    • congenital fistula of lips (Q38.0) Q38.0
    • congenital hypertrophy of lips (Q18.6) Q18.6
    • Perlèche due to candidiasis (B37.83) B37.83
    • Perlèche due to riboflavin deficiency (E53.0) E53.0
  2. K13.1
    Cheek and lip biting
    Billable
  3. K13.2
    Leukoplakia and other disturbances of oral epithelium, including tongue
    Header
    Excludes1 2

    Excludes1

    • carcinoma in situ of oral epithelium (D00.0-) D00.0
    • hairy leukoplakia (K13.3) K13.3
  4. K13.21
    Leukoplakia of oral mucosa, including tongue
    Billable
    Inclusion terms 2, Excludes1 2

    Inclusion terms

    • Leukokeratosis of oral mucosa
    • Leukoplakia of gingiva, lips, tongue

    Excludes1

    • hairy leukoplakia (K13.3) K13.3
    • leukokeratosis nicotina palati (K13.24) K13.24
  5. K13.22
    Minimal keratinized residual ridge mucosa
    Billable
    Inclusion terms 1

    Inclusion terms

    • Minimal keratinization of alveolar ridge mucosa
  6. K13.23
    Excessive keratinized residual ridge mucosa
    Billable
    Inclusion terms 1

    Inclusion terms

    • Excessive keratinization of alveolar ridge mucosa
  7. K13.24
    Leukokeratosis nicotina palati
    Billable
    Inclusion terms 1

    Inclusion terms

    • Smoker's palate
  8. K13.29
    Other disturbances of oral epithelium, including tongue
    Billable
    Inclusion terms 4

    Inclusion terms

    • Erythroplakia of mouth or tongue
    • Focal epithelial hyperplasia of mouth or tongue
    • Leukoedema of mouth or tongue
    • Other oral epithelium disturbances
  9. K13.3
    Hairy leukoplakia
    Billable
  10. K13.4
    Granuloma and granuloma-like lesions of oral mucosa
    Billable
    Inclusion terms 3

    Inclusion terms

    • Eosinophilic granuloma
    • Granuloma pyogenicum
    • Verrucous xanthoma
  11. K13.5
    Oral submucous fibrosis
    Billable
    Inclusion terms 1

    Inclusion terms

    • Submucous fibrosis of tongue
  12. K13.6
    Irritative hyperplasia of oral mucosa
    Billable
    Excludes2 1

    Excludes2

    • irritative hyperplasia of edentulous ridge [denture hyperplasia] (K06.2) K06.2
  13. K13.7
    Other and unspecified lesions of oral mucosa
    Header
  14. K13.70
    Unspecified lesions of oral mucosa
    Billable
  15. K13.79
    Other lesions of oral mucosa
    Billable
    Inclusion terms 1

    Inclusion terms

    • Focal oral mucinosis

Sources of each column.

Instructions

At K13

Includes

  • epithelial disturbances of tongue

Excludes2

  • certain disorders of gingiva and edentulous alveolar ridge (K05-K06) K05 K06
  • cysts of oral region (K09.-) K09
  • diseases of tongue (K14.-) K14
  • stomatitis and related lesions (K12.-) K12

Use additional code

  • code to identify:
  • alcohol abuse and dependence (F10.-) F10
  • exposure to environmental tobacco smoke (Z77.22) Z77.22
  • exposure to tobacco smoke in the perinatal period (P96.81) P96.81
  • history of tobacco dependence (Z87.891) Z87.891
  • occupational exposure to environmental tobacco smoke (Z57.31) Z57.31
  • tobacco dependence (F17.-) F17
  • tobacco use (Z72.0) Z72.0

Notes that also apply

Chapter 11 instructions (Excludes2 8): printed on the chapter 11 page.

Index entries

  • Angulus infectiosus (lips) → K13.0
  • Baelz's disease (cheilitis glandularis apostematosa) → K13.0
  • Cheilitis (acute) (angular) (catarrhal) (chronic) (exfoliative) (gangrenous) (glandular) (infectional) (suppurative) (ulcerative) (vesicular) → K13.0
  • Cheilodynia → K13.0
  • Cheilosis (angular) → K13.0
  • Myxadenitis labialis → K13.0
  • Perlèche NEC → K13.0
  • Puente's disease (simple glandular cheilitis) → K13.0
  • Biting, cheek or lip → K13.1
  • Erythroplakia, oral epithelium, and tongue → K13.29
  • Leukoedema, oral epithelium → K13.29
  • Palatoplegia → K13.79
  • Stomatorrhagia → K13.79
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)lip → K13.0
  • Atrophy, atrophic (of)lip → K13.0
  • Cellulitis (diffuse) (phlegmonous) (septic) (suppurative)lip → K13.0
  • Cyst (colloid) (mucous) (simple) (retention)lip (gland) → K13.0
  • Deformitylip (acquired) NEC → K13.0
  • Disease, diseasedBaelz's (cheilitis glandularis apostematosa) → K13.0
  • Disease, diseasedlip → K13.0
  • Disease, diseasedPuente's (simple glandular cheilitis) → K13.0
  • Ectropionlip (acquired) → K13.0
  • Fissure, fissuredlip → K13.0
  • Fistula (cutaneous)lip → K13.0
  • Hypertrophy, hypertrophiclip → K13.0
  • Inflammation, inflamed, inflammatory (with exudation)lip → K13.0
  • Intertrigolabialis → K13.0
  • Lesion(s) (nontraumatic)lip → K13.0
  • Paralysis, paralytic (complete) (incomplete)lip → K13.0
  • Stomatitis (denture) (ulcerative)angular → K13.0
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativelip → K13.0
  • Leukokeratosismouth → K13.21
  • Leukokeratosisoral mucosa → K13.21
  • Leukokeratosistongue → K13.21
  • Leukoplakiabuccal → K13.21
  • Leukoplakiagingiva → K13.21
  • Leukoplakialip → K13.21
  • Leukoplakiamouth → K13.21
  • Leukoplakiaoral epithelium, including tongue (mucosa) → K13.21
  • Leukoplakiapalate → K13.21

52 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

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