K11.21 – Acute sialoadenitis

ICD-10-CM 2027 diagnosis code · Diseases of oral cavity and salivary glands

Billable code

ICD-10-CM code K11.21
Code
K11.21 (claims format: K1121)
Description
Acute sialoadenitis
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
11. Diseases of the digestive system (K00-K95)
Block
K00-K14 Diseases of oral cavity and salivary glands
Parent codes
K11 › K11.2

Notes for K11.21

Excludes1 (not coded here):
  • acute recurrent sialoadenitis (K11.22)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

K11 – Diseases of salivary glands

Use additional code:
  • code to identify:
  • alcohol abuse and dependence (F10.-)
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

K11.2 – Sialoadenitis

Applicable to:
  • Parotitis
Excludes1 (not coded here):
  • epidemic parotitis (B26.-)
  • mumps (B26.-)
  • uveoparotid fever [Heerfordt] (D86.89)

Index terms for K11.21

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in K11.2

Frequently asked questions

What is ICD-10 code K11.21?

K11.21 is the ICD-10-CM code for acute sialoadenitis, in the block K00-K14 (Diseases of oral cavity and salivary glands).

Is K11.21 a billable code?

Yes. K11.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does K11.21 belong to?

It belongs to category K11 – Diseases of salivary glands.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.