2027 ICD-10-CM Diagnosis Code K13Other diseases of lip and oral mucosa

ICD-10-CM Codes›K00–K95›K00-K14›K13

ICD-10-CM K13
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

K13 is a non-billable ICD-10-CM category code for other diseases of lip and oral mucosa, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K13.0, K13.1, K13.21, and K13.22.

Code Identity

ICD-10-CM Code
K13
Billable Status
No — Non-Billable Category
Code Describes
Other diseases of lip and oral mucosa
Short Description
Other diseases of lip and oral mucosa
Same as the full description in the CMS dataset.
Chapter
K00-K14
Diseases of oral cavity and salivary glands

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK13Other diseases of lip and oral mucosa
This CodeK13Other diseases of lip and oral mucosa

Specific Coding for Other diseases of lip and oral mucosaOverview

Non-specific codes like K13 require more characters. Use one of these billable codes instead:

  • Use K13.0 for Diseases of lips

  • Use K13.1 for Cheek and lip biting

  • K13.2 for Leukoplakia and other disturbances of oral epithelium, including tongue

  • Use K13.21 for Leukoplakia of oral mucosa, including tongue

  • Use K13.22 for Minimal keratinized residual ridge mucosa

  • Use K13.23 for Excessive keratinized residual ridge mucosa

  • Use K13.24 for Leukokeratosis nicotina palati

  • Use K13.29 for Other disturbances of oral epithelium, including tongue

  • Use K13.3 for Hairy leukoplakia

  • Use K13.4 for Granuloma and granuloma-like lesions of oral mucosa

  • Use K13.5 for Oral submucous fibrosis

  • Use K13.6 for Irritative hyperplasia of oral mucosa

  • K13.7 for Other and unspecified lesions of oral mucosa

  • Use K13.70 for Unspecified lesions of oral mucosa

  • Use K13.79 for Other lesions of oral mucosa

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K13: its own notes plus those printed at Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

  • epithelial disturbances of tongue

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On K13 itself
  • certain disorders of gingiva and edentulous alveolar ridge (K05-K06)
  • cysts of oral region (K09.-)
  • diseases of tongue (K14.-)
  • stomatitis and related lesions (K12.-)
From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 codes
  • 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)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

  • 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)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

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.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K13Overview

What is the ICD-10 code for other diseases of lip and oral mucosa?

K13 is the ICD-10-CM category for other diseases of lip and oral mucosa, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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

No. This is a category header that groups the codes for other diseases of lip and oral mucosa, and headers cannot be submitted on claims. Claims for other diseases of lip and oral mucosa need a more specific code from this category, such as K13.0, K13.1, and K13.21.

Does K13 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: 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); and 2 more listed in the Instructional Notes section. The additional code is reported after K13.