K11.21: Acute sialoadenitis
K11.21 is the billable ICD-10-CM diagnosis code for Acute sialoadenitis. 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 K11.21?
K11.21 is the ICD-10-CM diagnosis code for Acute sialoadenitis. It belongs to category K11 (Diseases of salivary glands).
Is K11.21 a billable code?
Yes. K11.21 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 K11.21 belong to?
K11.21 is part of ICD-10-CM category K11 — Diseases of salivary glands, which has 26 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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