K12.3

K12.3: Oral mucositis (ulcerative)

Non-billable headerICD-10-CM

K12.3 is a non-billable header ICD-10-CM code for oral mucositis (ulcerative). It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

gastrointestinal mucositis (ulcerative) (K92.81)
mucositis (ulcerative) of vagina and vulva (N76.81)
nasal mucositis (ulcerative) (J34.81)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Mucositis (oral) (oropharyneal)

Excludes1 inherited from the categories above K12.3

A category’s note binds every code beneath it.

Written on K12: Stomatitis and related lesions

cancrum oris (A69.0)
cheilitis (K13.0)
gangrenous stomatitis (A69.0)
herpesviral [herpes simplex] gingivostomatitis (B00.2)
noma (A69.0)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead K12.3

5 child codes. Green means billable.