K12.0
ICD-10BillableRecurrent oral aphthae
Official ICD-10-CM descriptor (FY2026)
Recurrent oral aphthae
K12.0 is valid for submission on a claim — CMS flags it as a billable, specific code.
Inclusion terms
- Aphthous stomatitis (major) (minor)
- Bednar's aphthae
- Periadenitis mucosa necrotica recurrens
- Recurrent aphthous ulcer
- Stomatitis herpetiformis
Related codes in K12
Where this code sits
- Parent code
- K12
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.