K11.21 Acute sialoadenitis

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• acute recurrent sialoadenitis (K11.22)

Applies from 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)

Applies from K11.2 Sialoadenitis

Applicable to

• Parotitis

Excludes1 (never code together)

• epidemic parotitis (B26.-)
• mumps (B26.-)
• uveoparotid fever [Heerfordt] (D86.89)

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 527.2 Sialoadenitis (approximate)

Diagnosis Index entries for K11.21

• Sialoadenitis (any gland) (periodic) (suppurative) › acute

Nearby codes

• K11 Diseases of salivary glands
• K11.0 Atrophy of salivary gland
• K11.1 Hypertrophy of salivary gland
• K11.2 Sialoadenitis
• K11.20 Sialoadenitis, unspecified
• K11.21 Acute sialoadenitis (this code)
• K11.22 Acute recurrent sialoadenitis
• K11.23 Chronic sialoadenitis
• K11.3 Abscess of salivary gland
• K11.4 Fistula of salivary gland
• K11.5 Sialolithiasis