J03.9
ICD-10Non-billable categoryAcute tonsillitis, unspecified
Official ICD-10-CM descriptor (FY2026)
Acute tonsillitis, unspecified
J03.9 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Inclusion terms
- Follicular tonsillitis (acute)
- Gangrenous tonsillitis (acute)
- Infective tonsillitis (acute)
- Tonsillitis (acute) NOS
- Ulcerative tonsillitis (acute)
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- influenza virus with other respiratory manifestations (J09.X2, J10.1, J11.1)
ICD-10-CM FY2026 defines 2 codes beneath J03.9. See the ICD-10-CM index for what this site publishes.
Related codes in J03
Where this code sits
- Parent code
- J03
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.