K11.21
✓ Billable
Acute sialoadenitis
ICD-10-CM · FY2026 · Diseases of the Digestive System
Code
K11.21
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Digestive System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code K11.21?
ICD-10-CM code K11.21 represents Acute sialoadenitis. It is a billable diagnosis code in the Diseases of the Digestive System chapter, effective October 1, 2025 – September 30, 2026.
Is K11.21 billable?
Yes. K11.21 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is K11.21 in?
K11.21 belongs to the Diseases of the Digestive System chapter (K00–K95) of ICD-10-CM.
Related codes in the K11 category
K11
Diseases of salivary glands
Non-billable
K11.0
Atrophy of salivary gland
Billable
K11.1
Hypertrophy of salivary gland
Billable
K11.2
Sialoadenitis
Non-billable
K11.3
Abscess of salivary gland
Billable
K11.4
Fistula of salivary gland
Billable
K11.5
Sialolithiasis
Billable
K11.6
Mucocele of salivary gland
Billable
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