Is K12 a billable code?
No. K12 is a header code that groups 8 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
K12: Stomatitis and related lesions
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
K12 groups related diagnoses under stomatitis and related lesions. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under K12
- 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)
K12 questions
What does K12 mean?
K12 is the ICD-10-CM code for Stomatitis and related lesions. It is in chapter 11, Diseases of the digestive system (K00-K95).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.