K12.31: Oral mucositis (ulcerative) due to antineoplastic therapy
K12.31 is the billable ICD-10-CM diagnosis code for Oral mucositis (ulcerative) due to antineoplastic therapy. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code K12.31?
K12.31 is the ICD-10-CM diagnosis code for Oral mucositis (ulcerative) due to antineoplastic therapy. It belongs to category K12 (Stomatitis and related lesions).
Is K12.31 a billable code?
Yes. K12.31 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does K12.31 belong to?
K12.31 is part of ICD-10-CM category K12 — Stomatitis and related lesions, which has 16 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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