ICD-10-CM › K00-K95 › K00-K14 › K12 Stomatitis and related lesions › K12.0
Recurrent oral aphthae
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Recurrent oral aphthae
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from K12 Stomatitis and related lesions
Excludes1 - never coded here
- cancrum oris (A69.0)
- cheilitis (K13.0)
- gangrenous stomatitis (A69.0)
- herpesviral [herpes simplex] gingivostomatitis (B00.2)
- noma (A69.0)
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)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Canker
- Bednar's > aphthae
- Sore > mouth > canker
- Stomatitis > aphthous
- Aphthae, aphthous > oral
- Aphthae, aphthous > ulcer
- Stomatitis > herpetiformis
- Aphthae, aphthous > Bednar's
- Aphthae, aphthous > stomatitis
- Periadenitis mucosa necrotica recurrens
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative > aphthous
Codes in the same group
| Code | Description | Status |
|---|---|---|
| K12.1 | Other forms of stomatitis | Valid |
| K12.2 | Cellulitis and abscess of mouth | Valid |
| K12.3 | Oral mucositis (ulcerative) | Not billable |