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K12 Stomatitis and related lesions

ICD-10-CM category K12 sits in Chapter 11 (Diseases of the digestive system, K00-K95). It contains 8 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

K12.3 Oral mucositis (ulcerative)

Billable codes in K12

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

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