Other diseases of lip and oral mucosa
In Diseases of oral cavity and salivary glands (K00-K14), chapter 11: Diseases of the Digestive System
13 billable codes under K13: none are a CC or MCC; none map to an HCC.
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Instructional notes
Includes: conditions that are coded here
- epithelial disturbances of tongue
Excludes2: not included here, code separately if applicable
Use additional code: add a second code for this, listed after this one
- 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)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
There are no chapter-specific rules for Chapter 11 yet, so the general rules in Section I.B apply.
All codes under K13
K13 can't be used on a claim. Pick a billable code below; grey headings group them.
- K13.0Diseases of lips
- K13.1Cheek and lip biting
- K13.2Leukoplakia and other disturbances of oral epithelium, including tongue
- K13.21Leukoplakia of oral mucosa, including tongue
- K13.22Minimal keratinized residual ridge mucosa
- K13.23Excessive keratinized residual ridge mucosa
- K13.24Leukokeratosis nicotina palati
- K13.29Other disturbances of oral epithelium, including tongue
- K13.3Hairy leukoplakia
- K13.4Granuloma and granuloma-like lesions of oral mucosa
- K13.5Oral submucous fibrosis
- K13.6Irritative hyperplasia of oral mucosa
- K13.7Other and unspecified lesions of oral mucosa
- K13.70Unspecified lesions of oral mucosa
- K13.79Other lesions of oral mucosa
K13 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Mouth Disorders
Your mouth is one of the most important parts of your body. It has many different functions. It allows you to: Any problem that affects your mouth can make it hard to eat, drink, or even smile. Some common mouth problems include:
Read more about mouth disorders on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.