ICD-10-CM · Chapter 11 · K00-K95
K12 Stomatitis and related lesions
Excludes 1 (cannot be coded together)
- 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)
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| K12..0 | Recurrent oral aphthae | Yes |
| K12..1 | Other forms of stomatitis | Yes |
| K12..2 | Cellulitis and abscess of mouth | Yes |
| K12..3 | Oral mucositis (ulcerative) | No |
| K12..30 | Oral mucositis (ulcerative), unspecified | Yes |
| K12..31 | Oral mucositis (ulcerative) due to antineoplastic therapy | Yes |
| K12..32 | Oral mucositis (ulcerative) due to other drugs | Yes |
| K12..33 | Oral mucositis (ulcerative) due to radiation | Yes |
| K12..39 | Other oral mucositis (ulcerative) | Yes |
Last reviewed: September 2026