K12.0 – Recurrent oral aphthae
ICD-10-CM 2027 diagnosis code · Diseases of oral cavity and salivary glands
ICD-10-CM code
K12.0
- Code
K12.0(claims format:K120)- Description
- Recurrent oral aphthae
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 11. Diseases of the digestive system (K00-K95)
- Block
- K00-K14 Diseases of oral cavity and salivary glands
- Parent codes
- K12
Notes for K12.0
Applicable to:
- Aphthous stomatitis (major) (minor)
- Bednar's aphthae
- Periadenitis mucosa necrotica recurrens
- Recurrent aphthous ulcer
- Stomatitis herpetiformis
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
K12 – Stomatitis and related lesions
Excludes1 (not coded here):
Use additional code:
- 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)
Index terms for K12.0
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in K12
Frequently asked questions
What is ICD-10 code K12.0?
K12.0 is the ICD-10-CM code for recurrent oral aphthae, in the block K00-K14 (Diseases of oral cavity and salivary glands).
Is K12.0 a billable code?
Yes. K12.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does K12.0 belong to?
It belongs to category K12 – Stomatitis and related lesions.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.