K12.3
Header — not billableOral mucositis (ulcerative)
The ICD-10 code for oral mucositis (ulcerative) is K12.3.
K12.3 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 5 more specific codes below.
Clinical notes
Excludes2 (not included here)
An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Mucositis (oral) (oropharyneal)
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- K12.0Recurrent oral aphthae
- K12.1Other forms of stomatitis
- K12.2Cellulitis and abscess of mouth
- K12.3Oral mucositis (ulcerative)non-billable header