K12.3
Oral mucositis (ulcerative)
Coding guidance (WHO 2019)
Mucositis(oral) (oropharyngeal): NOS drug-induced radiation induced viral Use additional external cause code (Chapter XX), if desired, to identify external agent Excl.: mucositis (ulcerative) of gastrointestinal tract (except oral cavity and oropharynx) (K92.8)