All ICD10 Codes
K12Not billable, use a more specific code below

Stomatitis and related lesions

In Diseases of oral cavity and salivary glands (K00-K14), chapter 11: Diseases of the Digestive System

8 billable codes under K12: 1 is a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

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Instructional notes

Excludes1: not coded here, use a different code

  • cancrum oris (A69.0)
  • cheilitis (K13.0)
  • gangrenous stomatitis (A69.0)
  • herpesviral [herpes simplex] gingivostomatitis (B00.2)
  • noma (A69.0)

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.

Read Section I.C.11 (page 58)

All codes under K12

K12 can't be used on a claim. Pick a billable code below; grey headings group them.

K12 MS-DRGs

This code does not group to an MS-DRG as a principal diagnosis.

Other codes that refer to K12

Notes on these codes point to K12.

  • K13 Excludes2: stomatitis and related lesions (K12.-)
  • L51 Use Additional Code: stomatitis (K12.-)

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 MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.