K11.21
Billable codeAcute sialoadenitis
The ICD-10 code for acute sialoadenitis is K11.21.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
- acute recurrent sialoadenitis (K11.22)
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- K11.20Sialoadenitis, unspecified
- K11.22Acute recurrent sialoadenitis
- K11.23Chronic sialoadenitis
- K11.21Acute sialoadenitis
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 5272Approximate match
Associated MS-DRGs
K11.21 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.
- DRG 011Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC
- DRG 012Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC
- DRG 013Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC
- DRG 154Other Ear, Nose, Mouth and Throat Diagnoses with MCC
- DRG 155Other Ear, Nose, Mouth and Throat Diagnoses with CC
- DRG 156Other Ear, Nose, Mouth and Throat Diagnoses without CC/MCC