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K12

⚠ Non-billable (Header)

Stomatitis and related lesions

Diseases of the digestive system (K00-K95)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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📋 Code Instructions

  • • 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)

❌ Excludes1

direct

Cannot be coded with K12

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

Child Codes (4)

K12.0Recurrent oral aphthaeK12.1Other forms of stomatitisK12.2Cellulitis and abscess of mouthK12.3Oral mucositis (ulcerative)

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Code Information

CodeK12
BillableNo — Header code
CategoryDiseases of the digestive system (K00-K95)
Excludes15 rule(s)
Excludes20 note(s)
Child codes4

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)