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  3. Ch. K00-K95
  4. Sec. K00-K14
  5. Category K12
Category K12

Stomatitis and related lesions

Clinical Classification Guidelines

Specific Diagnosis Codes

Recurrent oral aphthae
K12.0
Other forms of stomatitis
K12.1
Cellulitis and abscess of mouth
K12.2
Oral mucositis (ulcerative)
K12.3
Oral mucositis (ulcerative), unspecified
K12.30
Oral mucositis (ulcerative) due to antineoplastic therapy
K12.31
Oral mucositis (ulcerative) due to other drugs
K12.32
Oral mucositis (ulcerative) due to radiation
K12.33
Other oral mucositis (ulcerative)
K12.39
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Data updated for October 2025 release.

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