K12.0
ICD-10-CMThis code represents a chronic or recurring inflammatory condition characterized by painful, open sores (ulcers) on the mucous membranes inside the mouth. These lesions are typically round or oval with a white or yellowish center and a red border, and they are not associated with herpes simplex virus infection.
Use this code when documentation clearly indicates a diagnosis of recurrent aphthous stomatitis or recurrent aphthous ulcers. This applies to patients experiencing repeated episodes of oral aphthae, rather than a single, isolated occurrence. Supporting documentation should specify the recurrent nature of the condition.
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