2026 ICD-10-CM Diagnosis Code K13.0Diseases of lips

ICD-10-CM Codes›K00–K95›K00-K14›K13

ICD-10-CM K13.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K13.0 is a billable ICD-10-CM diagnosis code for diseases of lips. 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. 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
K13.0
Billable Status
Yes — Valid for Submission
Code Describes
Diseases of lips
Short Description
Diseases of lips
Same as the full description in the CMS dataset.
Parent Code
K13
Other diseases of lip and oral mucosa

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK13Other diseases of lip and oral mucosa
This CodeK13.0Diseases of lips

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abscess of lip
  • Abscess of oral soft tissue
  • Acquired anomaly of lip
  • Acquired ectropion of lip
  • Allergic contact cheilitis
  • Angular cheilitis
  • Angular cheilitis due to bacterial infection
  • Angular cheilitis due to lack of adequate intermaxillary vertical dimension
  • Angular cheilitis due to nutritional deficiency
  • Blue lips
  • Cellulitis of lip
  • Cellulitis of oral soft tissues
  • Chapping of lips
  • Cheilitis
  • Cheilitis due to atopic dermatitis
  • Cheilitis due to lupus erythematosus
  • Cheilitis glandularis
  • Cheilitis glandularis, deep suppurative type
  • Cheilitis glandularis, superficial suppurative type
  • Cheilitis granulomatosa of Miescher-Melkersson-Rosenthal
  • Cheilitis medicamentosa
  • Cheilodynia
  • Cheilosis
  • Circumscribed palmoplantar keratoderma
  • Contact cheilitis
  • Cracked lips
  • Cyst of oral soft tissue
  • Dermatosis of lip
  • Destructive attachment of labial frenum
  • Disorder of lip
  • Dry lips
  • Eczematous cheilitis
  • Edema of oral soft tissues
  • Enlarged labial frenum
  • Eosinophilic ulcer of lip
  • Erythema multiforme-induced ulceration of lips
  • Eversion of lower lip
  • Eversion of upper lip vermilion
  • Exfoliative cheilitis
  • Exogenous pigmentation of oral mucosa
  • Facial eczema
  • Finding of arrangement of lip
  • Finding of color of lips
  • Finding of moistness of lip
  • Finding of size of lip
  • Focal acral hyperkeratosis
  • Fountain syndrome
  • Granulomatous cheilitis
  • Hyperplasia of salivary gland
  • Hypertrophy of lip
  • Idiopathic exfoliative cheilitis
  • Incompetent lip due to overjet
  • Infection of lip
  • Infective dermatosis of lip
  • Irritant contact cheilitis
  • Irritant contact dermatitis of face
  • Lesion of lip
  • Lip competence - finding
  • Lip discoloration
  • Lip incompetence
  • Lip line
  • Lip swelling
  • Lip ulcer
  • Lip ulcer due to caliber persistent artery
  • Lips habitually held together
  • Local exogenous pigmentation of mucous membrane of lower lip
  • Local exogenous pigmentation of mucous membrane of upper lip
  • Local exogenous pigmentation of oral mucosa
  • Localized swelling of head
  • Lower lip low
  • Lymphedema of lip
  • Median fissure of lip
  • Mucocele of lower lip
  • Mucous cyst of upper lip
  • Pigmentation disorder of lip
  • PLACK syndrome
  • Plasma cell cheilitis
  • Protrusive lower lip
  • Protrusive upper lip
  • Punctate palmoplantar keratoderma
  • Retrusive lower lip
  • Retrusive upper lip
  • Scar of mucous membrane of lower lip
  • Scar of mucous membrane of upper lip
  • Skin and mucous membrane disorder of mouth, lips and tongue
  • Sore lip
  • Staphylococcal angular cheilitis
  • Staphylococcal fissure of lower lip
  • Ulcer of lower lip
  • Volume loss of lip

Tabular List NotesGuidance

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

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

Type 1 Excludes

  • ariboflavinosis E53.0
  • cheilitis due to radiation-related disorders L55 L59
  • congenital fistula of lips Q38.0
  • congenital hypertrophy of lips Q18.6
  • Perlèche due to candidiasis B37.83
  • Perlèche due to riboflavin deficiency E53.0

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.

    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • lip
    • Angulus infectiosus(lips)
    • Atrophy, atrophic(of)
      • lip
    • Baelz's disease(cheilitis glandularis apostematosa)
    • Cellulitis(diffuse) (phlegmonous) (septic) (suppurative)
      • lip
    • Cheilitis(acute) (angular) (catarrhal) (chronic) (exfoliative) (gangrenous) (glandular) (infectional) (suppurative) (ulcerative) (vesicular)
    • Cheilodynia
    • Cheilosis(angular)
    • Cyst(colloid) (mucous) (simple) (retention)
      • lip (gland)
    • Deformity
      • lip (acquired) NEC
    • Disease, diseased
      • Baelz's (cheilitis glandularis apostematosa)
    • Disease, diseased
      • lip
    • Disease, diseased
      • Puente's (simple glandular cheilitis)
    • Disturbance(s)
      • keratinization NEC
        • lip
    • Ectropion
      • lip (acquired)
    • Fissure, fissured
      • lip
    • Fistula(cutaneous)
      • lip
    • Hypertrophy, hypertrophic
      • frenulum, frenum (tongue)
        • lip
    • Hypertrophy, hypertrophic
      • lip
    • Inflammation, inflamed, inflammatory(with exudation)
      • lip
    • Intertrigo
      • labialis
    • Lesion(s) (nontraumatic)
      • lip
    • Myxadenitis labialis
    • Paralysis, paralytic(complete) (incomplete)
      • lip
    • Perlèche NEC
    • Puente's disease(simple glandular cheilitis)
    • Stomatitis(denture) (ulcerative)
      • angular
    • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
      • lip

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

  • Cheilitis

    inflammation of the lips. it is of various etiologies and degrees of pathology.

  • Melkersson-Rosenthal Syndrome

    an idiopathic syndrome characterized by one or more of the following; recurrent orofacial swelling, relapsing facial paralysis, and fissured tongue (lingua plicata). the onset is usually in childhood and relapses are common. cheilitis granulomatosa is a monosymptomatic variant of this condition. (dermatol clin 1996 apr;14(2):371-9; magalini & magalini, dictionary of medical syndromes, 4th ed, p531)

  • Grade 1 Cheilitis, CTCAE|Grade 1 Cheilitis|Grade 1 Cheilitis

    clinical or diagnostic observations only; intervention not indicated

  • Grade 2 Cheilitis, CTCAE|Grade 2 Cheilitis|Grade 2 Cheilitis

    moderate symptoms; limiting instrumental adl or mild/moderate impact on age-appropriate normal daily activity (pediatric)

  • Grade 3 Cheilitis, CTCAE|Grade 3 Cheilitis|Grade 3 Cheilitis

    severe symptoms; intervention indicated; limiting self-care adl or severe impact on age-appropriate normal daily activity (pediatric)

  • Actinic Cheilitis|Actinic Cheilosis|Solar Cheilitis|Solar Cheilosis

    cheilitis due to chronic exposure to ultraviolet (uv) radiation. it may increase the risk for the development of invasive squamous cell carcinoma of the lip.

  • Angular Cheilitis|Cheilosis|Cheilosis|Perleche|Perleche|Perlèche

    inflammation of the skin at the corners of the mouth characterized by redness, fissures or crusts.

  • Cheilitis

    an inflammatory process affecting the lip.

  • Cheilitis, CTCAE|Cheilitis|Cheilitis|Cheilitis

    a disorder characterized by inflammation of the lip.

  • Grade 1 Cheilitis, CTCAE|Grade 1 Cheilitis|Grade 1 Cheilitis

    asymptomatic; clinical or diagnostic observations only; intervention not indicated

  • Grade 2 Cheilitis, CTCAE|Grade 2 Cheilitis|Grade 2 Cheilitis

    moderate symptoms; limiting instrumental adl

  • Grade 3 Cheilitis, CTCAE|Grade 3 Cheilitis|Grade 3 Cheilitis

    severe symptoms; limiting self care adl; intervention indicated

  • Cracking at the Corners of the Mouth (Cheilosis/Cheilitis), PRO-CTCAE|Cheilosis/Cheilitis, PRO-CTCAE|Cracking at the corners of the mouth (cheilosis/cheilitis)|PRO-CTCAE, Cracking at the Corners of the Mouth (Cheilosis/Cheilitis)

    cheilosis or cheilitis as recorded on the pro-ctcae questionnaire.

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 K13.0 to ICD-9-CMHistory

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

ICD-9-CM
528.5 Diseases of lips
Exact Match The mapping is direct, with no qualifiers.

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 K13.0Overview

Is K13.0 (Other diseases of lip and oral mucosa) a billable code?

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

What MS-DRG does K13.0 group to?

When diseases of lips 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 K13.0?

Under the General Equivalence Mappings, diseases of lips converts to ICD-9-CM 528.5 (diseases of lips). The mapping is a direct match.

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.