Oral mucositis (ulcerative) due to radiation

This code signifies inflammation and ulceration of the oral mucous membranes specifically caused by radiation therapy. It represents a painful side effect of radiation, often impacting a patient's ability to eat, speak, and maintain oral hygiene. The "ulcerative" aspect indicates the presence of open sores or lesions.

Apply this code when documentation clearly states oral mucositis, stomatitis, or ulceration of the mouth is a direct consequence of therapeutic radiation. This is commonly seen in patients undergoing radiation for head and neck cancers. Supporting documentation should explicitly link the oral findings to radiation treatment.

• Always sequence this code after the underlying malignancy and the appropriate external cause code for radiation therapy (e.g., Y84.2).
• Differentiate from other forms of mucositis; ensure the documentation specifies radiation as the etiology.
• Do not use for non-ulcerative oral mucositis due to radiation; a different subcategory exists for that presentation.