K12.3
Non-billableOral mucositis (ulcerative)
K12.3 is the ICD-10-CM code for Oral mucositis (ulcerative). It is a non-billable category code — use a more specific child code such as K12.30 for billing.
K00-K95 Diseases of the digestive system
What this means — in plain language
MedlinePlus · NIHYour mouth is one of the most important parts of your body. It has many different functions. It allows you to: Take in food and drink Breathe in air Start digestion, with your teeth chewing the food you eat and your salivary glands releasing saliva to help break down the food Speak and sing Show emotion, by smiling or pouting Any problem that affects your mouth can make it hard to eat, drink, or even smile. Some…
Read more about Mouth Disorders at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •Mucositis (oral) (oropharyneal)
Excludes2 — not included here
Medications indicated for this condition
FDA labeling- Cevimeline›
- PaliferminMucocutaneous Epithelial Cell Growth Factor [EPC]›
- penicillin V›
- Silver Nitrate Applicators›
Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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