K12.33

Billable

Oral mucositis (ulcerative) due to radiation

K12.33 is the ICD-10-CM code for Oral mucositis (ulcerative) due to radiation. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
K00-K95
Parent
K12.3
Edition
FY2026

K00-K95 Diseases of the digestive system

What this means — in plain language

MedlinePlus · NIH

Your 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.

Use additional code

  • external cause code (W88-W90, X39.0-) to identify cause

Medications indicated for this condition

FDA labeling

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 · NIH

Plain-language health-topic references grounded in MedlinePlus (NIH/NLM).

Frequently asked questions

What is ICD-10 code K12.33?
K12.33 is the ICD-10-CM code for "Oral mucositis (ulcerative) due to radiation". It falls under K00-K95 Diseases of the digestive system.
Is K12.33 a billable code?
Yes — K12.33 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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